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Unitedhealth Group Inc – ‘10-K’ for 12/31/17 – ‘EX-101.LAB’

On:  Tuesday, 2/13/18, at 4:10pm ET   ·   For:  12/31/17   ·   Accession #:  731766-18-5   ·   File #:  1-10864

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  As Of               Filer                 Filing    For·On·As Docs:Size

 2/13/18  Unitedhealth Group Inc            10-K       12/31/17  103:18M

Annual Report   —   Form 10-K   —   Sect. 13 / 15(d) – SEA’34
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-K        Annual Report                                       HTML   1.36M 
 2: EX-10.51    Material Contract                                   HTML     68K 
 4: EX-21.1     Subsidiaries List                                   HTML    229K 
 5: EX-23.1     Consent of Experts or Counsel                       HTML     30K 
 6: EX-24.1     Power of Attorney                                   HTML     38K 
 3: EX-12.1     Statement re: Computation of Ratios                 HTML     42K 
 7: EX-31.1     Certification -- §302 - SOA'02                      HTML     44K 
 8: EX-32.1     Certification -- §906 - SOA'02                      HTML     33K 
15: R1          Document and Entity Information Document            HTML     58K 
16: R2          Consolidated Balance Sheets                         HTML    125K 
17: R3          Consolidated Balance Sheet (Parenthetical)          HTML     55K 
18: R4          Consolidated Statements of Operations               HTML     97K 
19: R5          Consolidated Statements of Comprehensive Income     HTML     66K 
20: R6          Consolidated Statements of Changes in Equity        HTML    109K 
21: R7          Consolidated Statements of Cash Flows               HTML    124K 
22: R8          Description of Business (Notes)                     HTML     30K 
23: R9          Basis of Presentation, Uses of Estimates and        HTML     95K 
                Significant Accounting Policies (Notes)                          
24: R10         Investments (Notes)                                 HTML    252K 
25: R11         Fair Value (Notes)                                  HTML    180K 
26: R12         Property, Plant, and Capitalized Software (Notes)   HTML     52K 
27: R13         Goodwill and Intangible Assets (Notes)              HTML    115K 
28: R14         Medical Costs Payable (Notes)                       HTML     79K 
29: R15         Commercial Paper and Long-Term Debt (Notes)         HTML    237K 
30: R16         Income Taxes (Notes)                                HTML    159K 
31: R17         Shareholders' Equity (Notes)                        HTML     49K 
32: R18         Share-Based Compensation (Notes)                    HTML    110K 
33: R19         Commitments and Contingencies (Notes)               HTML     48K 
34: R20         Segment Financial Information (Notes)               HTML    306K 
35: R21         Quarterly Financial Data (Unaudited) (Notes)        HTML     80K 
36: R22         Schedule I (Notes)                                  HTML    200K 
37: R23         Basis of Presentation, Uses of Estimates and        HTML    153K 
                Significant Accounting Policies (Policies)                       
38: R24         Fair Value Fair Value (Policies)                    HTML     43K 
39: R25         Schedule I (Policies)                               HTML    121K 
40: R26         Basis of Presentation, Uses of Estimates and        HTML     69K 
                Significant Accounting Policies (Tables)                         
41: R27         Investments (Tables)                                HTML    250K 
42: R28         Fair Value (Tables)                                 HTML    170K 
43: R29         Property, Plant, and Capitalized Software (Tables)  HTML     50K 
44: R30         Goodwill and Intangible Assets (Tables)             HTML    120K 
45: R31         Medical Costs Payable (Tables)                      HTML     80K 
46: R32         Commercial Paper and Long-Term Debt (Tables)        HTML    236K 
47: R33         Income Taxes (Tables)                               HTML    160K 
48: R34         Shareholders' Equity (Tables)                       HTML     41K 
49: R35         Share-Based Compensation (Tables)                   HTML    113K 
50: R36         Commitments and Contingencies (Tables)              HTML     39K 
51: R37         Segment Financial Information (Tables)              HTML    297K 
52: R38         Quarterly Financial Data (Unaudited) (Tables)       HTML     80K 
53: R39         Schedule I (Tables)                                 HTML    204K 
54: R40         Basis of Presentation, Uses of Estimates and        HTML     86K 
                Significant Accounting Policies (Details)                        
55: R41         Basis of Presentation, Uses of Estimates and        HTML     41K 
                Significant Accounting Policies Useful lives for                 
                property, equipment and capitalized software                     
                (Details)                                                        
56: R42         Basis of Presentation, Uses of Estimates and        HTML     52K 
                Significant Accounting Policies Redeemable                       
                Noncontrolling Interests (Details)                               
57: R43         Investments (Narrative) (Details)                   HTML     36K 
58: R44         Investments (Short-Term and Long-Term Investments)  HTML     95K 
                (Details)                                                        
59: R45         Investments (Amortized Cost and Fair Value of       HTML    103K 
                Available-for-Sale Debt Securities by Contractual                
                Maturity) (Details)                                              
60: R46         Investments (Fair Value of Available-For-Sale       HTML     73K 
                Investments with Gross Unrealized Losses by                      
                Investment Type and Length of Time That Individual               
                Securities Have Been in a Continuous Unrealized                  
                Loss Position) (Details)                                         
61: R47         Investments (Net Realized Gains) (Details)          HTML     48K 
62: R48         Fair Value (Narrative) (Details)                    HTML     46K 
63: R49         Fair Value (Financial Assets and Liabilities,       HTML     88K 
                Measured at Fair Value on a Recurring Basis)                     
                (Details)                                                        
64: R50         Fair Value (Financial Assets and Liabilities, Not   HTML     78K 
                Measured at Fair Value on a Recurring Basis)                     
                (Details)                                                        
65: R51         Property, Plant, and Capitalized Software           HTML     34K 
                (Details)                                                        
66: R52         Property, Plant, and Capitalized Software Property  HTML     53K 
                Plant and Equipment Table (Details)                              
67: R53         Goodwill and Intangible Assets (Details)            HTML     32K 
68: R54         Goodwill and Intangible Assets Changes in the       HTML     49K 
                Carrying Amount of Goodwill by Reporting Segment                 
                (Details)                                                        
69: R55         Goodwill and Intangible Assets Gross carrying       HTML     47K 
                value, accumulated amortization and net carrying                 
                value of intangible assets (Details)                             
70: R56         Goodwill and Intangible Assets Weighted-average     HTML     41K 
                useful lives assigned to finite-lived intangible                 
                assets acquired in business combinations (Details)               
71: R57         Goodwill and Intangible Assets Amortization         HTML     40K 
                Expense relating to Intangible Assets (Details)                  
72: R58         Medical Costs Payable (Details)                     HTML     29K 
73: R59         Medical Costs Payable Rollforward (Details)         HTML     53K 
74: R60         Medical Costs Payable, Incurred and Paid Medical    HTML     43K 
                Cost Development (Details)                                       
75: R61         Commercial Paper and Long-Term Debt (Narrative)     HTML     65K 
                (Details)                                                        
76: R62         Commercial Paper and Long-Term Debt (Details)       HTML    191K 
77: R63         Commercial Paper and Long-Term Debt Maturities of   HTML     45K 
                commercial paper and long-term debt (Details)                    
78: R64         Income Taxes (Details)                              HTML     62K 
79: R65         Income Taxes Reconciliation of Provision for        HTML     46K 
                Income Taxes (Details)                                           
80: R66         Income Tax Reconciliation of the tax provision at   HTML     80K 
                the U.S. Federal Statutory Rate (Details)                        
81: R67         Income Taxes Components of Deferred Tax Assets and  HTML     79K 
                Liabilities (Details)                                            
82: R68         Income Taxes Reconciliation of the beginning and    HTML     45K 
                ending amount of unrecognized tax benefits                       
                (Details)                                                        
83: R69         Shareholders' Equity (Details)                      HTML     45K 
84: R70         Shareholders' Equity Share Repurchases (Details)    HTML     40K 
85: R71         Share-Based Compensation Narrative (Details)        HTML     36K 
86: R72         Share-Based Compensation (Stock Option and SAR      HTML     76K 
                Activity) (Details)                                              
87: R73         Share-Based Compensation (Restricted Share          HTML     46K 
                Activity) (Details)                                              
88: R74         Share-Based Compensation Other Share-Based          HTML     61K 
                Compensation Data (Details)                                      
89: R75         Share-Based Compensation (Share-Based Compensation  HTML     48K 
                Principal Fair Value Assumptions) (Details)                      
90: R76         Commitments and Contingencies (Details)             HTML     36K 
91: R77         Commitments and Contingencies Future Lease          HTML     45K 
                Payments (Details)                                               
92: R78         Segment Financial Information (Narrative)           HTML     43K 
                (Details)                                                        
93: R79         Segment Financial Information (Details)             HTML    121K 
94: R80         Quarterly Financial Data (Unaudited) (Details)      HTML     61K 
95: R81         Schedule I (Details)                                HTML     41K 
96: R82         Schedule I Condensed Balance Sheets (Details)       HTML    109K 
97: R83         Schedule I Balance Sheet Document (Details)         HTML     49K 
98: R84         Schedule I Condensed Statement of Comprehensive     HTML     66K 
                Income (Details)                                                 
99: R85         Schedule I Statement of Cash Flows (Details)        HTML    102K 
100: R86         Schedule I Maturities of Commercial Paper and       HTML     48K  
                Long-Term Debt (Details)                                         
102: XML         IDEA XML File -- Filing Summary                      XML    190K  
101: EXCEL       IDEA Workbook of Financial Reports                  XLSX    133K  
 9: EX-101.INS  XBRL Instance -- unh-20171231                        XML   5.79M 
11: EX-101.CAL  XBRL Calculations -- unh-20171231_cal                XML    313K 
12: EX-101.DEF  XBRL Definitions -- unh-20171231_def                 XML   1.44M 
13: EX-101.LAB  XBRL Labels -- unh-20171231_lab                      XML   2.38M 
14: EX-101.PRE  XBRL Presentations -- unh-20171231_pre               XML   1.66M 
10: EX-101.SCH  XBRL Schema -- unh-20171231                          XSD    219K 
103: ZIP         XBRL Zipped Folder -- 0000731766-18-000005-xbrl      Zip    409K

‘EX-101.LAB’   —   XBRL Labels — unh-20171231_lab

This Exhibit is an XBRL XML File.

                                                                                                                                                                                
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<link:label id="lab_unh_A2.375notesdueOctober2022MemberMember_F284851D5957691A675A8A89F2ACC585_label_en-US" xlink:label="lab_unh_A2.375notesdueOctober2022MemberMember_F284851D5957691A675A8A89F2ACC585" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 2.375% notes due October 2022 [Member] [Member] </link:label>
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<link:label id="lab_unh_A1.950notesdueOctober2020MemberMember_D96D53BAC2DB03228DAB8A89F2ACEBFE_label_en-US" xlink:label="lab_unh_A1.950notesdueOctober2020MemberMember_D96D53BAC2DB03228DAB8A89F2ACEBFE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 1.950% notes due October 2020 [Member] [Member] </link:label>
<link:label id="lab_unh_A1.950notesdueOctober2020MemberMember_D96D53BAC2DB03228DAB8A89F2ACEBFE_documentation_en-US" xlink:label="lab_unh_A1.950notesdueOctober2020MemberMember_D96D53BAC2DB03228DAB8A89F2ACEBFE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 1.950% notes due October 2020 [Member] [Member] </link:label>
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<link:label id="lab_unh_A2.950notesdueOctober2027Member_101EE6B177E29C8455D58A89F2ACE116_label_en-US" xlink:label="lab_unh_A2.950notesdueOctober2027Member_101EE6B177E29C8455D58A89F2ACE116" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 2.950% notes due October 2027 [Member] </link:label>
<link:label id="lab_unh_A2.950notesdueOctober2027Member_101EE6B177E29C8455D58A89F2ACE116_documentation_en-US" xlink:label="lab_unh_A2.950notesdueOctober2027Member_101EE6B177E29C8455D58A89F2ACE116" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 2.950% notes due October 2027 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A2.950notesdueOctober2027Member" xlink:label="loc_unh_A2.950notesdueOctober2027Member_101EE6B177E29C8455D58A89F2ACE116" xlink:type="locator"/>
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<link:label id="lab_unh_A3.750notesdueOctober2047Member_A35B534141906D9C55E98A89F2AC5EBE_label_en-US" xlink:label="lab_unh_A3.750notesdueOctober2047Member_A35B534141906D9C55E98A89F2AC5EBE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 3.750% notes due October 2047 [Member] </link:label>
<link:label id="lab_unh_A3.750notesdueOctober2047Member_A35B534141906D9C55E98A89F2AC5EBE_documentation_en-US" xlink:label="lab_unh_A3.750notesdueOctober2047Member_A35B534141906D9C55E98A89F2AC5EBE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 3.750% notes due October 2047 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A3.750notesdueOctober2047Member" xlink:label="loc_unh_A3.750notesdueOctober2047Member_A35B534141906D9C55E98A89F2AC5EBE" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ConsolidatedEntitiesAxis_FF4CD20EE5D12681599E8A89F2ACCE86_terseLabel_en-US" xlink:label="lab_us-gaap_ConsolidatedEntitiesAxis_FF4CD20EE5D12681599E8A89F2ACCE86" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Consolidated Entities [Axis] </link:label>
<link:label id="lab_us-gaap_ConsolidatedEntitiesAxis_FF4CD20EE5D12681599E8A89F2ACCE86_label_en-US" xlink:label="lab_us-gaap_ConsolidatedEntitiesAxis_FF4CD20EE5D12681599E8A89F2ACCE86" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Consolidated Entities [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_FF4CD20EE5D12681599E8A89F2ACCE86" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ConsolidatedEntitiesDomain_97985A573AFC67D10EE68A89F2ACCD63_terseLabel_en-US" xlink:label="lab_us-gaap_ConsolidatedEntitiesDomain_97985A573AFC67D10EE68A89F2ACCD63" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Consolidated Entities [Domain] </link:label>
<link:label id="lab_us-gaap_ConsolidatedEntitiesDomain_97985A573AFC67D10EE68A89F2ACCD63_label_en-US" xlink:label="lab_us-gaap_ConsolidatedEntitiesDomain_97985A573AFC67D10EE68A89F2ACCD63" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Consolidated Entities [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_97985A573AFC67D10EE68A89F2ACCD63" xlink:type="locator"/>
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<link:label id="lab_us-gaap_SubsidiariesMember_D0DEFEDB9C2005C067A18A89F2ACE869_terseLabel_en-US" xlink:label="lab_us-gaap_SubsidiariesMember_D0DEFEDB9C2005C067A18A89F2ACE869" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Subsidiaries [Member] </link:label>
<link:label id="lab_us-gaap_SubsidiariesMember_D0DEFEDB9C2005C067A18A89F2ACE869_label_en-US" xlink:label="lab_us-gaap_SubsidiariesMember_D0DEFEDB9C2005C067A18A89F2ACE869" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Subsidiaries [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_D0DEFEDB9C2005C067A18A89F2ACE869" xlink:type="locator"/>
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<link:label id="lab_unh_CreditFacilityNameAxis_F4B822124BF48BAEE06F8A89F2ACD075_terseLabel_en-US" xlink:label="lab_unh_CreditFacilityNameAxis_F4B822124BF48BAEE06F8A89F2ACD075" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Credit Facility Name [Axis] </link:label>
<link:label id="lab_unh_CreditFacilityNameAxis_F4B822124BF48BAEE06F8A89F2ACD075_label_en-US" xlink:label="lab_unh_CreditFacilityNameAxis_F4B822124BF48BAEE06F8A89F2ACD075" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Credit Facility Name [Axis] </link:label>
<link:label id="lab_unh_CreditFacilityNameAxis_F4B822124BF48BAEE06F8A89F2ACD075_documentation_en-US" xlink:label="lab_unh_CreditFacilityNameAxis_F4B822124BF48BAEE06F8A89F2ACD075" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Credit Facility Name [Axis] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_CreditFacilityNameAxis" xlink:label="loc_unh_CreditFacilityNameAxis_F4B822124BF48BAEE06F8A89F2ACD075" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_CreditFacilityNameAxis_F4B822124BF48BAEE06F8A89F2ACD075" xlink:to="lab_unh_CreditFacilityNameAxis_F4B822124BF48BAEE06F8A89F2ACD075" xlink:type="arc"/>
<link:label id="lab_unh_CreditFacilityNameDomain_98012C2289FC18EA29DA8A89F2ACC0CA_terseLabel_en-US" xlink:label="lab_unh_CreditFacilityNameDomain_98012C2289FC18EA29DA8A89F2ACC0CA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Credit Facility Name [Domain] </link:label>
<link:label id="lab_unh_CreditFacilityNameDomain_98012C2289FC18EA29DA8A89F2ACC0CA_label_en-US" xlink:label="lab_unh_CreditFacilityNameDomain_98012C2289FC18EA29DA8A89F2ACC0CA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Credit Facility Name [Domain] </link:label>
<link:label id="lab_unh_CreditFacilityNameDomain_98012C2289FC18EA29DA8A89F2ACC0CA_documentation_en-US" xlink:label="lab_unh_CreditFacilityNameDomain_98012C2289FC18EA29DA8A89F2ACC0CA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> [Domain] for Credit Facility Name [Axis] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_CreditFacilityNameDomain" xlink:label="loc_unh_CreditFacilityNameDomain_98012C2289FC18EA29DA8A89F2ACC0CA" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_CreditFacilityNameDomain_98012C2289FC18EA29DA8A89F2ACC0CA" xlink:to="lab_unh_CreditFacilityNameDomain_98012C2289FC18EA29DA8A89F2ACC0CA" xlink:type="arc"/>
<link:label id="lab_unh_FiveYear30BillionCreditFacilityMember_D6F46204D8D8DE1240A98A89F2AC59B5_terseLabel_en-US" xlink:label="lab_unh_FiveYear30BillionCreditFacilityMember_D6F46204D8D8DE1240A98A89F2AC59B5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Five Year $3.0 Billion Credit Facility [Member] </link:label>
<link:label id="lab_unh_FiveYear30BillionCreditFacilityMember_D6F46204D8D8DE1240A98A89F2AC59B5_label_en-US" xlink:label="lab_unh_FiveYear30BillionCreditFacilityMember_D6F46204D8D8DE1240A98A89F2AC59B5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Five Year $3.0 Billion Credit Facility [Member] </link:label>
<link:label id="lab_unh_FiveYear30BillionCreditFacilityMember_D6F46204D8D8DE1240A98A89F2AC59B5_documentation_en-US" xlink:label="lab_unh_FiveYear30BillionCreditFacilityMember_D6F46204D8D8DE1240A98A89F2AC59B5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Five Year $3.0 Billion Credit Facility [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_FiveYear30BillionCreditFacilityMember" xlink:label="loc_unh_FiveYear30BillionCreditFacilityMember_D6F46204D8D8DE1240A98A89F2AC59B5" xlink:type="locator"/>
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<link:label id="lab_unh_ThreeYear3.0BillionCreditFacilityMember_0F31F79BD8A53299B2388A89F2AC6453_terseLabel_en-US" xlink:label="lab_unh_ThreeYear3.0BillionCreditFacilityMember_0F31F79BD8A53299B2388A89F2AC6453" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Three Year $3.0 Billion Credit Facility [Member] </link:label>
<link:label id="lab_unh_ThreeYear3.0BillionCreditFacilityMember_0F31F79BD8A53299B2388A89F2AC6453_label_en-US" xlink:label="lab_unh_ThreeYear3.0BillionCreditFacilityMember_0F31F79BD8A53299B2388A89F2AC6453" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Three Year 3.0 Billion Credit Facility [Member] </link:label>
<link:label id="lab_unh_ThreeYear3.0BillionCreditFacilityMember_0F31F79BD8A53299B2388A89F2AC6453_documentation_en-US" xlink:label="lab_unh_ThreeYear3.0BillionCreditFacilityMember_0F31F79BD8A53299B2388A89F2AC6453" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Three Year 3.0 Billion Credit Facility [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_ThreeYear3.0BillionCreditFacilityMember" xlink:label="loc_unh_ThreeYear3.0BillionCreditFacilityMember_0F31F79BD8A53299B2388A89F2AC6453" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_ThreeYear3.0BillionCreditFacilityMember_0F31F79BD8A53299B2388A89F2AC6453" xlink:to="lab_unh_ThreeYear3.0BillionCreditFacilityMember_0F31F79BD8A53299B2388A89F2AC6453" xlink:type="arc"/>
<link:label id="lab_unh_A364Day4.0BillionCreditFacilityMember_C1D9B188D3B3A86A54EE8A89F2AC7971_terseLabel_en-US" xlink:label="lab_unh_A364Day4.0BillionCreditFacilityMember_C1D9B188D3B3A86A54EE8A89F2AC7971" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 364 Day $4.0 Billion Credit Facility [Member] </link:label>
<link:label id="lab_unh_A364Day4.0BillionCreditFacilityMember_C1D9B188D3B3A86A54EE8A89F2AC7971_label_en-US" xlink:label="lab_unh_A364Day4.0BillionCreditFacilityMember_C1D9B188D3B3A86A54EE8A89F2AC7971" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 364 Day $4.0 Billion Credit Facility [Member] </link:label>
<link:label id="lab_unh_A364Day4.0BillionCreditFacilityMember_C1D9B188D3B3A86A54EE8A89F2AC7971_documentation_en-US" xlink:label="lab_unh_A364Day4.0BillionCreditFacilityMember_C1D9B188D3B3A86A54EE8A89F2AC7971" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 364 Day $4.0 Billion Credit Facility [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A364Day4.0BillionCreditFacilityMember" xlink:label="loc_unh_A364Day4.0BillionCreditFacilityMember_C1D9B188D3B3A86A54EE8A89F2AC7971" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A364Day4.0BillionCreditFacilityMember_C1D9B188D3B3A86A54EE8A89F2AC7971" xlink:to="lab_unh_A364Day4.0BillionCreditFacilityMember_C1D9B188D3B3A86A54EE8A89F2AC7971" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShortTermDebtTypeAxis_7EF59A2443CD7D1F44478A89F2ADAFF0_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeAxis_7EF59A2443CD7D1F44478A89F2ADAFF0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Short-term Debt, Type [Axis] </link:label>
<link:label id="lab_us-gaap_ShortTermDebtTypeAxis_7EF59A2443CD7D1F44478A89F2ADAFF0_label_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeAxis_7EF59A2443CD7D1F44478A89F2ADAFF0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Short-term Debt, Type [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_7EF59A2443CD7D1F44478A89F2ADAFF0" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShortTermDebtTypeDomain_A0ABC778737FD56A54EC8A89F2AD6C60_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeDomain_A0ABC778737FD56A54EC8A89F2AD6C60" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Short-term Debt, Type [Domain] </link:label>
<link:label id="lab_us-gaap_ShortTermDebtTypeDomain_A0ABC778737FD56A54EC8A89F2AD6C60_label_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeDomain_A0ABC778737FD56A54EC8A89F2AD6C60" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Short-term Debt, Type [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_A0ABC778737FD56A54EC8A89F2AD6C60" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CommercialPaperMember_2A128B4CE0F9CEEED98E8A89F2AD6D7A_terseLabel_en-US" xlink:label="lab_us-gaap_CommercialPaperMember_2A128B4CE0F9CEEED98E8A89F2AD6D7A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Commercial Paper [Member] </link:label>
<link:label id="lab_us-gaap_CommercialPaperMember_2A128B4CE0F9CEEED98E8A89F2AD6D7A_label_en-US" xlink:label="lab_us-gaap_CommercialPaperMember_2A128B4CE0F9CEEED98E8A89F2AD6D7A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Commercial Paper [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommercialPaperMember" xlink:label="loc_us-gaap_CommercialPaperMember_2A128B4CE0F9CEEED98E8A89F2AD6D7A" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommercialPaperMember_2A128B4CE0F9CEEED98E8A89F2AD6D7A" xlink:to="lab_us-gaap_CommercialPaperMember_2A128B4CE0F9CEEED98E8A89F2AD6D7A" xlink:type="arc"/>
<link:label id="lab_us-gaap_RangeAxis_21E00DDD014AE676164E8A89F2AD24B1_terseLabel_en-US" xlink:label="lab_us-gaap_RangeAxis_21E00DDD014AE676164E8A89F2AD24B1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Range [Axis] </link:label>
<link:label id="lab_us-gaap_RangeAxis_21E00DDD014AE676164E8A89F2AD24B1_label_en-US" xlink:label="lab_us-gaap_RangeAxis_21E00DDD014AE676164E8A89F2AD24B1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Range [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_21E00DDD014AE676164E8A89F2AD24B1" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RangeAxis_21E00DDD014AE676164E8A89F2AD24B1" xlink:to="lab_us-gaap_RangeAxis_21E00DDD014AE676164E8A89F2AD24B1" xlink:type="arc"/>
<link:label id="lab_us-gaap_RangeMember_58ED6327C3B74470C98B8A89F2AD40ED_verboseLabel_en-US" xlink:label="lab_us-gaap_RangeMember_58ED6327C3B74470C98B8A89F2AD40ED" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Range [Member] </link:label>
<link:label id="lab_us-gaap_RangeMember_58ED6327C3B74470C98B8A89F2AD40ED_label_en-US" xlink:label="lab_us-gaap_RangeMember_58ED6327C3B74470C98B8A89F2AD40ED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Range [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_58ED6327C3B74470C98B8A89F2AD40ED" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RangeMember_58ED6327C3B74470C98B8A89F2AD40ED" xlink:to="lab_us-gaap_RangeMember_58ED6327C3B74470C98B8A89F2AD40ED" xlink:type="arc"/>
<link:label id="lab_us-gaap_MinimumMember_93F644A1FBBA60E7C0A88A89F2ADF017_terseLabel_en-US" xlink:label="lab_us-gaap_MinimumMember_93F644A1FBBA60E7C0A88A89F2ADF017" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Minimum [Member] </link:label>
<link:label id="lab_us-gaap_MinimumMember_93F644A1FBBA60E7C0A88A89F2ADF017_label_en-US" xlink:label="lab_us-gaap_MinimumMember_93F644A1FBBA60E7C0A88A89F2ADF017" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Minimum [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_93F644A1FBBA60E7C0A88A89F2ADF017" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinimumMember_93F644A1FBBA60E7C0A88A89F2ADF017" xlink:to="lab_us-gaap_MinimumMember_93F644A1FBBA60E7C0A88A89F2ADF017" xlink:type="arc"/>
<link:label id="lab_us-gaap_MaximumMember_5667389303F7398FE67C8A89F2ADDA47_terseLabel_en-US" xlink:label="lab_us-gaap_MaximumMember_5667389303F7398FE67C8A89F2ADDA47" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Maximum [Member] </link:label>
<link:label id="lab_us-gaap_MaximumMember_5667389303F7398FE67C8A89F2ADDA47_label_en-US" xlink:label="lab_us-gaap_MaximumMember_5667389303F7398FE67C8A89F2ADDA47" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Maximum [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_5667389303F7398FE67C8A89F2ADDA47" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MaximumMember_5667389303F7398FE67C8A89F2ADDA47" xlink:to="lab_us-gaap_MaximumMember_5667389303F7398FE67C8A89F2ADDA47" xlink:type="arc"/>
<link:label id="lab_us-gaap_CreditFacilityAxis_4D33CB6FA9A630477FCD8A89F2ADAEE7_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis_4D33CB6FA9A630477FCD8A89F2ADAEE7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Credit Facility [Axis] </link:label>
<link:label id="lab_us-gaap_CreditFacilityAxis_4D33CB6FA9A630477FCD8A89F2ADAEE7_label_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis_4D33CB6FA9A630477FCD8A89F2ADAEE7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Credit Facility [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_4D33CB6FA9A630477FCD8A89F2ADAEE7" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditFacilityAxis_4D33CB6FA9A630477FCD8A89F2ADAEE7" xlink:to="lab_us-gaap_CreditFacilityAxis_4D33CB6FA9A630477FCD8A89F2ADAEE7" xlink:type="arc"/>
<link:label id="lab_us-gaap_CreditFacilityDomain_2CB35B5F69545C4469538A89F2AD5703_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain_2CB35B5F69545C4469538A89F2AD5703" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Credit Facility [Domain] </link:label>
<link:label id="lab_us-gaap_CreditFacilityDomain_2CB35B5F69545C4469538A89F2AD5703_label_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain_2CB35B5F69545C4469538A89F2AD5703" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Credit Facility [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_2CB35B5F69545C4469538A89F2AD5703" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditFacilityDomain_2CB35B5F69545C4469538A89F2AD5703" xlink:to="lab_us-gaap_CreditFacilityDomain_2CB35B5F69545C4469538A89F2AD5703" xlink:type="arc"/>
<link:label id="lab_us-gaap_RevolvingCreditFacilityMember_8B210A575F83E0EC9C298A89F2ADC858_terseLabel_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember_8B210A575F83E0EC9C298A89F2ADC858" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Revolving Credit Facility [Member] </link:label>
<link:label id="lab_us-gaap_RevolvingCreditFacilityMember_8B210A575F83E0EC9C298A89F2ADC858_label_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember_8B210A575F83E0EC9C298A89F2ADC858" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Revolving Credit Facility [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_8B210A575F83E0EC9C298A89F2ADC858" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevolvingCreditFacilityMember_8B210A575F83E0EC9C298A89F2ADC858" xlink:to="lab_us-gaap_RevolvingCreditFacilityMember_8B210A575F83E0EC9C298A89F2ADC858" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentLineItems_D6555E61BAEF1E0EA1C38A89F2ADA771_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems_D6555E61BAEF1E0EA1C38A89F2ADA771" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt Instrument [Line Items] </link:label>
<link:label id="lab_us-gaap_DebtInstrumentLineItems_D6555E61BAEF1E0EA1C38A89F2ADA771_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems_D6555E61BAEF1E0EA1C38A89F2ADA771" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_D6555E61BAEF1E0EA1C38A89F2ADA771" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentLineItems_D6555E61BAEF1E0EA1C38A89F2ADA771" xlink:to="lab_us-gaap_DebtInstrumentLineItems_D6555E61BAEF1E0EA1C38A89F2ADA771" xlink:type="arc"/>
<link:label id="lab_us-gaap_RepaymentsOfAssumedDebt_C3C8EB249B6819DFC6CA8A89F2ADCB1D_terseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfAssumedDebt_C3C8EB249B6819DFC6CA8A89F2ADCB1D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Repayments of Assumed Debt </link:label>
<link:label id="lab_us-gaap_RepaymentsOfAssumedDebt_C3C8EB249B6819DFC6CA8A89F2ADCB1D_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfAssumedDebt_C3C8EB249B6819DFC6CA8A89F2ADCB1D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Repayments of Assumed Debt </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RepaymentsOfAssumedDebt" xlink:label="loc_us-gaap_RepaymentsOfAssumedDebt_C3C8EB249B6819DFC6CA8A89F2ADCB1D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfAssumedDebt_C3C8EB249B6819DFC6CA8A89F2ADCB1D" xlink:to="lab_us-gaap_RepaymentsOfAssumedDebt_C3C8EB249B6819DFC6CA8A89F2ADCB1D" xlink:type="arc"/>
<link:label id="lab_us-gaap_OtherLongTermDebt_511AF17679A78A0DC8038A89F2AEC2A1_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLongTermDebt_511AF17679A78A0DC8038A89F2AEC2A1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other Long-term Debt </link:label>
<link:label id="lab_us-gaap_OtherLongTermDebt_511AF17679A78A0DC8038A89F2AEC2A1_label_en-US" xlink:label="lab_us-gaap_OtherLongTermDebt_511AF17679A78A0DC8038A89F2AEC2A1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Long-term Debt </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherLongTermDebt" xlink:label="loc_us-gaap_OtherLongTermDebt_511AF17679A78A0DC8038A89F2AEC2A1" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLongTermDebt_511AF17679A78A0DC8038A89F2AEC2A1" xlink:to="lab_us-gaap_OtherLongTermDebt_511AF17679A78A0DC8038A89F2AEC2A1" xlink:type="arc"/>
<link:label id="lab_us-gaap_OtherLongTermDebtCurrent_891AE8D44D7D082A91468A89F2AE93FA_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLongTermDebtCurrent_891AE8D44D7D082A91468A89F2AE93FA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other Long-term Debt, Current </link:label>
<link:label id="lab_us-gaap_OtherLongTermDebtCurrent_891AE8D44D7D082A91468A89F2AE93FA_label_en-US" xlink:label="lab_us-gaap_OtherLongTermDebtCurrent_891AE8D44D7D082A91468A89F2AE93FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Long-term Debt, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherLongTermDebtCurrent" xlink:label="loc_us-gaap_OtherLongTermDebtCurrent_891AE8D44D7D082A91468A89F2AE93FA" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLongTermDebtCurrent_891AE8D44D7D082A91468A89F2AE93FA" xlink:to="lab_us-gaap_OtherLongTermDebtCurrent_891AE8D44D7D082A91468A89F2AE93FA" xlink:type="arc"/>
<link:label id="lab_us-gaap_LineOfCredit_714CBB3E00E0D73626808A89F2AE7502_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCredit_714CBB3E00E0D73626808A89F2AE7502" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term Line of Credit </link:label>
<link:label id="lab_us-gaap_LineOfCredit_714CBB3E00E0D73626808A89F2AE7502_label_en-US" xlink:label="lab_us-gaap_LineOfCredit_714CBB3E00E0D73626808A89F2AE7502" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Line of Credit </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_714CBB3E00E0D73626808A89F2AE7502" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCredit_714CBB3E00E0D73626808A89F2AE7502" xlink:to="lab_us-gaap_LineOfCredit_714CBB3E00E0D73626808A89F2AE7502" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShortTermDebtWeightedAverageInterestRate_59A0297C609D36704EA28A89F2AEB906_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermDebtWeightedAverageInterestRate_59A0297C609D36704EA28A89F2AEB906" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Short-term Debt, Weighted Average Interest Rate, at Point in Time </link:label>
<link:label id="lab_us-gaap_ShortTermDebtWeightedAverageInterestRate_59A0297C609D36704EA28A89F2AEB906_label_en-US" xlink:label="lab_us-gaap_ShortTermDebtWeightedAverageInterestRate_59A0297C609D36704EA28A89F2AEB906" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Short-term Debt, Weighted Average Interest Rate, at Point in Time </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortTermDebtWeightedAverageInterestRate" xlink:label="loc_us-gaap_ShortTermDebtWeightedAverageInterestRate_59A0297C609D36704EA28A89F2AEB906" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortTermDebtWeightedAverageInterestRate_59A0297C609D36704EA28A89F2AEB906" xlink:to="lab_us-gaap_ShortTermDebtWeightedAverageInterestRate_59A0297C609D36704EA28A89F2AEB906" xlink:type="arc"/>
<link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_A02059A9E0D091E84C7E8A89F2AEB583_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_A02059A9E0D091E84C7E8A89F2AEB583" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Line of Credit, Credit Facility, Maximum Borrowing Capacity </link:label>
<link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_A02059A9E0D091E84C7E8A89F2AEB583_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_A02059A9E0D091E84C7E8A89F2AEB583" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Line of Credit Facility, Maximum Borrowing Capacity </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_A02059A9E0D091E84C7E8A89F2AEB583" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_A02059A9E0D091E84C7E8A89F2AEB583" xlink:to="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_A02059A9E0D091E84C7E8A89F2AEB583" xlink:type="arc"/>
<link:label id="lab_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_F23A149B23F94C25B0618A89F2AE75B2_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_F23A149B23F94C25B0618A89F2AE75B2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Interest Rate During Period </link:label>
<link:label id="lab_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_F23A149B23F94C25B0618A89F2AE75B2_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_F23A149B23F94C25B0618A89F2AE75B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Line of Credit Facility, Interest Rate During Period </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityInterestRateDuringPeriod" xlink:label="loc_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_F23A149B23F94C25B0618A89F2AE75B2" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_F23A149B23F94C25B0618A89F2AE75B2" xlink:to="lab_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_F23A149B23F94C25B0618A89F2AE75B2" xlink:type="arc"/>
<link:label id="lab_us-gaap_LineOfCreditFacilityExpirationPeriod_4ABC9112B2C853BCAE178A89F2AE7C4F_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityExpirationPeriod_4ABC9112B2C853BCAE178A89F2AE7C4F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Maturity Period, Line of Credit </link:label>
<link:label id="lab_us-gaap_LineOfCreditFacilityExpirationPeriod_4ABC9112B2C853BCAE178A89F2AE7C4F_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityExpirationPeriod_4ABC9112B2C853BCAE178A89F2AE7C4F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Line of Credit Facility, Expiration Period </link:label>
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<link:label id="lab_us-gaap_StatementTable_E6BE5E8DB26E6E62B6D350C3FAE1FA3E_terseLabel_en-US" xlink:label="lab_us-gaap_StatementTable_E6BE5E8DB26E6E62B6D350C3FAE1FA3E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Statement [Table] </link:label>
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<link:label id="lab_unh_MedicalCostsAndMedicalCostsPayableAxis_EC38AF2179F613B02BFE50C3FAE13144_label_en-US" xlink:label="lab_unh_MedicalCostsAndMedicalCostsPayableAxis_EC38AF2179F613B02BFE50C3FAE13144" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Medical Costs and Medical Costs Payable [Axis] </link:label>
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<link:label id="lab_unh_MedicalCostsAndMedicalCostsPayableDomain_2CC0974C0FD72CDC3A1A50C3FAE14E02_documentation_en-US" xlink:label="lab_unh_MedicalCostsAndMedicalCostsPayableDomain_2CC0974C0FD72CDC3A1A50C3FAE14E02" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Medical Costs and Medical Costs Payable [Domain] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_MedicalCostsAndMedicalCostsPayableDomain" xlink:label="loc_unh_MedicalCostsAndMedicalCostsPayableDomain_2CC0974C0FD72CDC3A1A50C3FAE14E02" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OtherCurrentLiabilitiesMember_F216DEFC010DB11ADD7950C3FAE1C7B9_terseLabel_en-US" xlink:label="lab_us-gaap_OtherCurrentLiabilitiesMember_F216DEFC010DB11ADD7950C3FAE1C7B9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other Current Liabilities [Member] </link:label>
<link:label id="lab_us-gaap_OtherCurrentLiabilitiesMember_F216DEFC010DB11ADD7950C3FAE1C7B9_label_en-US" xlink:label="lab_us-gaap_OtherCurrentLiabilitiesMember_F216DEFC010DB11ADD7950C3FAE1C7B9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Current Liabilities [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherCurrentLiabilitiesMember" xlink:label="loc_us-gaap_OtherCurrentLiabilitiesMember_F216DEFC010DB11ADD7950C3FAE1C7B9" xlink:type="locator"/>
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<link:label id="lab_us-gaap_StatementLineItems_8478FC5D5D4F1877F0F950C3FAE152E0_terseLabel_en-US" xlink:label="lab_us-gaap_StatementLineItems_8478FC5D5D4F1877F0F950C3FAE152E0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Statement [Line Items] </link:label>
<link:label id="lab_us-gaap_StatementLineItems_8478FC5D5D4F1877F0F950C3FAE152E0_label_en-US" xlink:label="lab_us-gaap_StatementLineItems_8478FC5D5D4F1877F0F950C3FAE152E0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Statement [Line Items] </link:label>
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<link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount_5C9FC905781795C9CF8650C3FAE19C28_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount_5C9FC905781795C9CF8650C3FAE19C28" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount </link:label>
<link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount_5C9FC905781795C9CF8650C3FAE19C28_label_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount_5C9FC905781795C9CF8650C3FAE19C28" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount </link:label>
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<link:label id="lab_us-gaap_SegmentReportingAbstract_C05A33C3ADABE5D2D62750C3FB1810FC_label_en-US" xlink:label="lab_us-gaap_SegmentReportingAbstract_C05A33C3ADABE5D2D62750C3FB1810FC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Segment Reporting [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_C05A33C3ADABE5D2D62750C3FB1810FC" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4B1A1487045B8891E05750C3FB183112_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4B1A1487045B8891E05750C3FB183112" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of Segment Reporting Information, by Segment [Table] </link:label>
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<link:label id="lab_us-gaap_OperatingSegmentsMember_1DCE787029771B6EA09550C3FB18E78B_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingSegmentsMember_1DCE787029771B6EA09550C3FB18E78B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Operating Segments [Member] </link:label>
<link:label id="lab_us-gaap_OperatingSegmentsMember_1DCE787029771B6EA09550C3FB18E78B_label_en-US" xlink:label="lab_us-gaap_OperatingSegmentsMember_1DCE787029771B6EA09550C3FB18E78B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Segments [Member] </link:label>
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<link:label id="lab_us-gaap_IntersegmentEliminationMember_B1DE0091A0BCC104913A50C3FB187A12_terseLabel_en-US" xlink:label="lab_us-gaap_IntersegmentEliminationMember_B1DE0091A0BCC104913A50C3FB187A12" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Optum Eliminations [Member] </link:label>
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<link:label id="lab_unh_IntersegmentMember_76C58E6698D93ECCF32B50C3FB19D0B2_documentation_en-US" xlink:label="lab_unh_IntersegmentMember_76C58E6698D93ECCF32B50C3FB19D0B2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Intersegment [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_IntersegmentMember" xlink:label="loc_unh_IntersegmentMember_76C58E6698D93ECCF32B50C3FB19D0B2" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_IntersegmentMember_76C58E6698D93ECCF32B50C3FB19D0B2" xlink:to="lab_unh_IntersegmentMember_76C58E6698D93ECCF32B50C3FB19D0B2" xlink:type="arc"/>
<link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_54764A82156CF19D4E0C50C3FB196329_terseLabel_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis_54764A82156CF19D4E0C50C3FB196329" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Segments [Axis] </link:label>
<link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_54764A82156CF19D4E0C50C3FB196329_label_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis_54764A82156CF19D4E0C50C3FB196329" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Segments [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_54764A82156CF19D4E0C50C3FB196329" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_54764A82156CF19D4E0C50C3FB196329" xlink:to="lab_us-gaap_StatementBusinessSegmentsAxis_54764A82156CF19D4E0C50C3FB196329" xlink:type="arc"/>
<link:label id="lab_us-gaap_SegmentDomain_65BB1A35F1B93AEC545550C3FB192456_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentDomain_65BB1A35F1B93AEC545550C3FB192456" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Segments [Domain] </link:label>
<link:label id="lab_us-gaap_SegmentDomain_65BB1A35F1B93AEC545550C3FB192456_label_en-US" xlink:label="lab_us-gaap_SegmentDomain_65BB1A35F1B93AEC545550C3FB192456" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Segments [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_65BB1A35F1B93AEC545550C3FB192456" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentDomain_65BB1A35F1B93AEC545550C3FB192456" xlink:to="lab_us-gaap_SegmentDomain_65BB1A35F1B93AEC545550C3FB192456" xlink:type="arc"/>
<link:label id="lab_unh_UnitedhealthcareMember_C7A39B561E1B6C6E32FC50C3FB19CCB1_terseLabel_en-US" xlink:label="lab_unh_UnitedhealthcareMember_C7A39B561E1B6C6E32FC50C3FB19CCB1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> UnitedHealthcare [Member] </link:label>
<link:label id="lab_unh_UnitedhealthcareMember_C7A39B561E1B6C6E32FC50C3FB19CCB1_label_en-US" xlink:label="lab_unh_UnitedhealthcareMember_C7A39B561E1B6C6E32FC50C3FB19CCB1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Unitedhealthcare [Member] </link:label>
<link:label id="lab_unh_UnitedhealthcareMember_C7A39B561E1B6C6E32FC50C3FB19CCB1_documentation_en-US" xlink:label="lab_unh_UnitedhealthcareMember_C7A39B561E1B6C6E32FC50C3FB19CCB1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> UnitedHealthcare [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_UnitedhealthcareMember" xlink:label="loc_unh_UnitedhealthcareMember_C7A39B561E1B6C6E32FC50C3FB19CCB1" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_UnitedhealthcareMember_C7A39B561E1B6C6E32FC50C3FB19CCB1" xlink:to="lab_unh_UnitedhealthcareMember_C7A39B561E1B6C6E32FC50C3FB19CCB1" xlink:type="arc"/>
<link:label id="lab_unh_TotalOptumMember_D69E21D92679B9D8366350C3FB1A86C0_terseLabel_en-US" xlink:label="lab_unh_TotalOptumMember_D69E21D92679B9D8366350C3FB1A86C0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Optum [Member] </link:label>
<link:label id="lab_unh_TotalOptumMember_D69E21D92679B9D8366350C3FB1A86C0_label_en-US" xlink:label="lab_unh_TotalOptumMember_D69E21D92679B9D8366350C3FB1A86C0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Total Optum [Member] </link:label>
<link:label id="lab_unh_TotalOptumMember_D69E21D92679B9D8366350C3FB1A86C0_documentation_en-US" xlink:label="lab_unh_TotalOptumMember_D69E21D92679B9D8366350C3FB1A86C0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> total [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_TotalOptumMember" xlink:label="loc_unh_TotalOptumMember_D69E21D92679B9D8366350C3FB1A86C0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_TotalOptumMember_D69E21D92679B9D8366350C3FB1A86C0" xlink:to="lab_unh_TotalOptumMember_D69E21D92679B9D8366350C3FB1A86C0" xlink:type="arc"/>
<link:label id="lab_unh_OptumhealthMember_2C4142159795740169F150C3FB1A54D6_terseLabel_en-US" xlink:label="lab_unh_OptumhealthMember_2C4142159795740169F150C3FB1A54D6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> OptumHealth [Member] </link:label>
<link:label id="lab_unh_OptumhealthMember_2C4142159795740169F150C3FB1A54D6_label_en-US" xlink:label="lab_unh_OptumhealthMember_2C4142159795740169F150C3FB1A54D6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Optumhealth [Member] </link:label>
<link:label id="lab_unh_OptumhealthMember_2C4142159795740169F150C3FB1A54D6_documentation_en-US" xlink:label="lab_unh_OptumhealthMember_2C4142159795740169F150C3FB1A54D6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> OptumHealth Member </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_OptumhealthMember" xlink:label="loc_unh_OptumhealthMember_2C4142159795740169F150C3FB1A54D6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_OptumhealthMember_2C4142159795740169F150C3FB1A54D6" xlink:to="lab_unh_OptumhealthMember_2C4142159795740169F150C3FB1A54D6" xlink:type="arc"/>
<link:label id="lab_unh_OptuminsightMember_61FA08AB3A000EB3586950C3FB1AF5A1_terseLabel_en-US" xlink:label="lab_unh_OptuminsightMember_61FA08AB3A000EB3586950C3FB1AF5A1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> OptumInsight [Member] </link:label>
<link:label id="lab_unh_OptuminsightMember_61FA08AB3A000EB3586950C3FB1AF5A1_label_en-US" xlink:label="lab_unh_OptuminsightMember_61FA08AB3A000EB3586950C3FB1AF5A1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Optuminsight [Member] </link:label>
<link:label id="lab_unh_OptuminsightMember_61FA08AB3A000EB3586950C3FB1AF5A1_documentation_en-US" xlink:label="lab_unh_OptuminsightMember_61FA08AB3A000EB3586950C3FB1AF5A1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> OptumInsight [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_OptuminsightMember" xlink:label="loc_unh_OptuminsightMember_61FA08AB3A000EB3586950C3FB1AF5A1" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_OptuminsightMember_61FA08AB3A000EB3586950C3FB1AF5A1" xlink:to="lab_unh_OptuminsightMember_61FA08AB3A000EB3586950C3FB1AF5A1" xlink:type="arc"/>
<link:label id="lab_unh_OptumrxMember_6339A4B1FC206D605EC650C3FB1AAAAF_terseLabel_en-US" xlink:label="lab_unh_OptumrxMember_6339A4B1FC206D605EC650C3FB1AAAAF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> OptumRx [Member] </link:label>
<link:label id="lab_unh_OptumrxMember_6339A4B1FC206D605EC650C3FB1AAAAF_label_en-US" xlink:label="lab_unh_OptumrxMember_6339A4B1FC206D605EC650C3FB1AAAAF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Optumrx [Member] </link:label>
<link:label id="lab_unh_OptumrxMember_6339A4B1FC206D605EC650C3FB1AAAAF_documentation_en-US" xlink:label="lab_unh_OptumrxMember_6339A4B1FC206D605EC650C3FB1AAAAF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> OptumRx [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_OptumrxMember" xlink:label="loc_unh_OptumrxMember_6339A4B1FC206D605EC650C3FB1AAAAF" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_OptumrxMember_6339A4B1FC206D605EC650C3FB1AAAAF" xlink:to="lab_unh_OptumrxMember_6339A4B1FC206D605EC650C3FB1AAAAF" xlink:type="arc"/>
<link:label id="lab_us-gaap_SegmentReportingInformationLineItems_D270BDC4A1FB72A0BF1550C3FB1A823B_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingInformationLineItems_D270BDC4A1FB72A0BF1550C3FB1A823B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Statement [Line Items] </link:label>
<link:label id="lab_us-gaap_SegmentReportingInformationLineItems_D270BDC4A1FB72A0BF1550C3FB1A823B_label_en-US" xlink:label="lab_us-gaap_SegmentReportingInformationLineItems_D270BDC4A1FB72A0BF1550C3FB1A823B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Segment Reporting Information [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_D270BDC4A1FB72A0BF1550C3FB1A823B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_D270BDC4A1FB72A0BF1550C3FB1A823B" xlink:to="lab_us-gaap_SegmentReportingInformationLineItems_D270BDC4A1FB72A0BF1550C3FB1A823B" xlink:type="arc"/>
<link:label id="lab_us-gaap_PremiumsEarnedNet_B9D2257FDA7843B2057750C3FB1A57D0_verboseLabel_en-US" xlink:label="lab_us-gaap_PremiumsEarnedNet_B9D2257FDA7843B2057750C3FB1A57D0" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Premiums, revenues - external customers </link:label>
<link:label id="lab_us-gaap_PremiumsEarnedNet_B9D2257FDA7843B2057750C3FB1A57D0_label_en-US" xlink:label="lab_us-gaap_PremiumsEarnedNet_B9D2257FDA7843B2057750C3FB1A57D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Premiums Earned, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PremiumsEarnedNet" xlink:label="loc_us-gaap_PremiumsEarnedNet_B9D2257FDA7843B2057750C3FB1A57D0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PremiumsEarnedNet_B9D2257FDA7843B2057750C3FB1A57D0" xlink:to="lab_us-gaap_PremiumsEarnedNet_B9D2257FDA7843B2057750C3FB1A57D0" xlink:type="arc"/>
<link:label id="lab_us-gaap_SalesRevenueGoodsNet_94A844C4C18C2A65B30E50C3FB1ABBB9_verboseLabel_en-US" xlink:label="lab_us-gaap_SalesRevenueGoodsNet_94A844C4C18C2A65B30E50C3FB1ABBB9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Products, revenues - external customers </link:label>
<link:label id="lab_us-gaap_SalesRevenueGoodsNet_94A844C4C18C2A65B30E50C3FB1ABBB9_label_en-US" xlink:label="lab_us-gaap_SalesRevenueGoodsNet_94A844C4C18C2A65B30E50C3FB1ABBB9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Sales Revenue, Goods, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SalesRevenueGoodsNet" xlink:label="loc_us-gaap_SalesRevenueGoodsNet_94A844C4C18C2A65B30E50C3FB1ABBB9" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SalesRevenueGoodsNet_94A844C4C18C2A65B30E50C3FB1ABBB9" xlink:to="lab_us-gaap_SalesRevenueGoodsNet_94A844C4C18C2A65B30E50C3FB1ABBB9" xlink:type="arc"/>
<link:label id="lab_us-gaap_SalesRevenueServicesNet_40710356F0E89541C75E50C3FB1A9AA2_verboseLabel_en-US" xlink:label="lab_us-gaap_SalesRevenueServicesNet_40710356F0E89541C75E50C3FB1A9AA2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Services, revenues - external customers </link:label>
<link:label id="lab_us-gaap_SalesRevenueServicesNet_40710356F0E89541C75E50C3FB1A9AA2_label_en-US" xlink:label="lab_us-gaap_SalesRevenueServicesNet_40710356F0E89541C75E50C3FB1A9AA2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Sales Revenue, Services, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SalesRevenueServicesNet" xlink:label="loc_us-gaap_SalesRevenueServicesNet_40710356F0E89541C75E50C3FB1A9AA2" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SalesRevenueServicesNet_40710356F0E89541C75E50C3FB1A9AA2" xlink:to="lab_us-gaap_SalesRevenueServicesNet_40710356F0E89541C75E50C3FB1A9AA2" xlink:type="arc"/>
<link:label id="lab_us-gaap_InvestmentIncomeInterestAndDividend_AA1AC1403C5F316C41BC50C3FB1A610F_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIncomeInterestAndDividend_AA1AC1403C5F316C41BC50C3FB1A610F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Investment and other income </link:label>
<link:label id="lab_us-gaap_InvestmentIncomeInterestAndDividend_AA1AC1403C5F316C41BC50C3FB1A610F_label_en-US" xlink:label="lab_us-gaap_InvestmentIncomeInterestAndDividend_AA1AC1403C5F316C41BC50C3FB1A610F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Investment Income, Interest and Dividend </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentIncomeInterestAndDividend" xlink:label="loc_us-gaap_InvestmentIncomeInterestAndDividend_AA1AC1403C5F316C41BC50C3FB1A610F" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIncomeInterestAndDividend_AA1AC1403C5F316C41BC50C3FB1A610F" xlink:to="lab_us-gaap_InvestmentIncomeInterestAndDividend_AA1AC1403C5F316C41BC50C3FB1A610F" xlink:type="arc"/>
<link:label id="lab_us-gaap_Revenues_8D13E88A20AE2F323BFB50C3FB1A4653_terseLabel_en-US" xlink:label="lab_us-gaap_Revenues_8D13E88A20AE2F323BFB50C3FB1A4653" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Total revenues </link:label>
<link:label id="lab_us-gaap_Revenues_8D13E88A20AE2F323BFB50C3FB1A4653_label_en-US" xlink:label="lab_us-gaap_Revenues_8D13E88A20AE2F323BFB50C3FB1A4653" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Revenues </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_8D13E88A20AE2F323BFB50C3FB1A4653" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Revenues_8D13E88A20AE2F323BFB50C3FB1A4653" xlink:to="lab_us-gaap_Revenues_8D13E88A20AE2F323BFB50C3FB1A4653" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingIncomeLoss_46D488FCDA9E0585DF6D50C3FB1AD844_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingIncomeLoss_46D488FCDA9E0585DF6D50C3FB1AD844" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Earnings from operations </link:label>
<link:label id="lab_us-gaap_OperatingIncomeLoss_46D488FCDA9E0585DF6D50C3FB1AD844_label_en-US" xlink:label="lab_us-gaap_OperatingIncomeLoss_46D488FCDA9E0585DF6D50C3FB1AD844" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Income (Loss) </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_46D488FCDA9E0585DF6D50C3FB1AD844" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingIncomeLoss_46D488FCDA9E0585DF6D50C3FB1AD844" xlink:to="lab_us-gaap_OperatingIncomeLoss_46D488FCDA9E0585DF6D50C3FB1AD844" xlink:type="arc"/>
<link:label id="lab_us-gaap_InterestExpense_97436AAAFAAD5EFFF62A50C3FB1A9C0B_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_InterestExpense_97436AAAFAAD5EFFF62A50C3FB1A9C0B" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Interest expense </link:label>
<link:label id="lab_us-gaap_InterestExpense_97436AAAFAAD5EFFF62A50C3FB1A9C0B_label_en-US" xlink:label="lab_us-gaap_InterestExpense_97436AAAFAAD5EFFF62A50C3FB1A9C0B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Interest Expense </link:label>
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<link:label id="lab_us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_B9B90AE850BE5FAA481750C3FA0D09B0_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_B9B90AE850BE5FAA481750C3FA0D09B0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Restricted Share Activity [Table Text Block] </link:label>
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<link:label id="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_16741982B3D193BCAF2A8A89BCE6FF60_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_16741982B3D193BCAF2A8A89BCE6FF60" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Deferred Income Tax Expense (Benefit) </link:label>
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<link:label id="lab_us-gaap_ShareBasedCompensation_8B0AC38A8F32593142E18A89BCE63836_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_8B0AC38A8F32593142E18A89BCE63836" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Share-based compensation </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensation_8B0AC38A8F32593142E18A89BCE63836_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_8B0AC38A8F32593142E18A89BCE63836" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation </link:label>
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<link:label id="lab_us-gaap_OtherNoncashIncomeExpense_DC584A8B5DCA41EE46B48A89BCE67B90_negatedLabel_en-US" xlink:label="lab_us-gaap_OtherNoncashIncomeExpense_DC584A8B5DCA41EE46B48A89BCE67B90" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Other, net </link:label>
<link:label id="lab_us-gaap_OtherNoncashIncomeExpense_DC584A8B5DCA41EE46B48A89BCE67B90_label_en-US" xlink:label="lab_us-gaap_OtherNoncashIncomeExpense_DC584A8B5DCA41EE46B48A89BCE67B90" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Noncash Income (Expense) </link:label>
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<link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_738E6434C949B2ACA9AF8A89BCE656F7_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_738E6434C949B2ACA9AF8A89BCE656F7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Net change in other operating items, net of effects from acquisitions and changes in AARP balances: </link:label>
<link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_738E6434C949B2ACA9AF8A89BCE656F7_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_738E6434C949B2ACA9AF8A89BCE656F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Increase (Decrease) in Operating Capital [Abstract] </link:label>
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<link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_2045533A22CFBCF603188A89BCE7887F_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_2045533A22CFBCF603188A89BCE7887F" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Accounts receivable </link:label>
<link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_2045533A22CFBCF603188A89BCE7887F_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_2045533A22CFBCF603188A89BCE7887F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Increase (Decrease) in Accounts Receivable </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_2045533A22CFBCF603188A89BCE7887F" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_877488659801EF76FC4A8A89BCE7C184_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_877488659801EF76FC4A8A89BCE7C184" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Other assets </link:label>
<link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_877488659801EF76FC4A8A89BCE7C184_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_877488659801EF76FC4A8A89BCE7C184" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Increase (Decrease) in Other Operating Assets </link:label>
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<link:label id="lab_us-gaap_IncreaseDecreaseInHealthCareInsuranceLiabilities_66B4BCF4C73FA9F7EA088A89BCE73A0A_verboseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInHealthCareInsuranceLiabilities_66B4BCF4C73FA9F7EA088A89BCE73A0A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Medical costs payable </link:label>
<link:label id="lab_us-gaap_IncreaseDecreaseInHealthCareInsuranceLiabilities_66B4BCF4C73FA9F7EA088A89BCE73A0A_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInHealthCareInsuranceLiabilities_66B4BCF4C73FA9F7EA088A89BCE73A0A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Increase (Decrease) in Health Care Insurance Liabilities </link:label>
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<link:label id="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_5D42F6EB8C326CB544B48A89BCE79A1F_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_5D42F6EB8C326CB544B48A89BCE79A1F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accounts payable and other liabilities </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_5D42F6EB8C326CB544B48A89BCE79A1F" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncreaseDecreaseInDeferredRevenue_3B4B4230283B38F6E3DC8A89BCE71BCB_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInDeferredRevenue_3B4B4230283B38F6E3DC8A89BCE71BCB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Unearned revenues </link:label>
<link:label id="lab_us-gaap_IncreaseDecreaseInDeferredRevenue_3B4B4230283B38F6E3DC8A89BCE71BCB_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInDeferredRevenue_3B4B4230283B38F6E3DC8A89BCE71BCB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Increase (Decrease) in Deferred Revenue </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredRevenue_3B4B4230283B38F6E3DC8A89BCE71BCB" xlink:type="locator"/>
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<link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_9795A17C69CA5B572C2F8A89BCE7B36C_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_9795A17C69CA5B572C2F8A89BCE7B36C" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Cash flows from operating activities </link:label>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_9795A17C69CA5B572C2F8A89BCE7B36C_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_9795A17C69CA5B572C2F8A89BCE7B36C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Cash Provided by (Used in) Operating Activities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9795A17C69CA5B572C2F8A89BCE7B36C" xlink:type="locator"/>
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<link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F069CA1F13C95A442C938A89BCE7B417_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F069CA1F13C95A442C938A89BCE7B417" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Investing activities </link:label>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F069CA1F13C95A442C938A89BCE7B417_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F069CA1F13C95A442C938A89BCE7B417" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Cash Provided by (Used in) Investing Activities [Abstract] </link:label>
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<link:label id="lab_us-gaap_PaymentsToAcquireInvestments_E9B28E49F7A8AA3B54968A89BCE71DD1_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireInvestments_E9B28E49F7A8AA3B54968A89BCE71DD1" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Purchases of investments </link:label>
<link:label id="lab_us-gaap_PaymentsToAcquireInvestments_E9B28E49F7A8AA3B54968A89BCE71DD1_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireInvestments_E9B28E49F7A8AA3B54968A89BCE71DD1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments to Acquire Investments </link:label>
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<link:label id="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_272B59D2EEF262FC09BD8A89BCE7D1BB_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_272B59D2EEF262FC09BD8A89BCE7D1BB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Sales of investments </link:label>
<link:label id="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_272B59D2EEF262FC09BD8A89BCE7D1BB_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_272B59D2EEF262FC09BD8A89BCE7D1BB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Proceeds from Sale of Available-for-sale Securities </link:label>
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<link:label id="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_2C95B2A631306752B96C8A89BCE7A2B2_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_2C95B2A631306752B96C8A89BCE7A2B2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Maturities of investments </link:label>
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<link:label id="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_C218C7E8D4F394E51D518A89BCE7BDEE_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_C218C7E8D4F394E51D518A89BCE7BDEE" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Cash paid for acquisitions, net of cash assumed </link:label>
<link:label id="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_C218C7E8D4F394E51D518A89BCE7BDEE_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_C218C7E8D4F394E51D518A89BCE7BDEE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments to Acquire Businesses, Net of Cash Acquired </link:label>
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<link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_7768B5D280F12A7F72138A89BCE7B608_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_7768B5D280F12A7F72138A89BCE7B608" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Purchases of property, equipment and capitalized software </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_7768B5D280F12A7F72138A89BCE7B608" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_7768B5D280F12A7F72138A89BCE7B608" xlink:to="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_7768B5D280F12A7F72138A89BCE7B608" xlink:type="arc"/>
<link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_A32BC870A624B1F835028A89BCE7D359_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_A32BC870A624B1F835028A89BCE7D359" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Other, net </link:label>
<link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_A32BC870A624B1F835028A89BCE7D359_label_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_A32BC870A624B1F835028A89BCE7D359" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments for (Proceeds from) Other Investing Activities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_A32BC870A624B1F835028A89BCE7D359" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_A32BC870A624B1F835028A89BCE7D359" xlink:to="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_A32BC870A624B1F835028A89BCE7D359" xlink:type="arc"/>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_5A11A26C75ABD18FADCF8A89BCE74820_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_5A11A26C75ABD18FADCF8A89BCE74820" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Cash flows used for investing activities </link:label>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_5A11A26C75ABD18FADCF8A89BCE74820_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_5A11A26C75ABD18FADCF8A89BCE74820" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Cash Provided by (Used in) Investing Activities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_5A11A26C75ABD18FADCF8A89BCE74820" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_5A11A26C75ABD18FADCF8A89BCE74820" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_5A11A26C75ABD18FADCF8A89BCE74820" xlink:type="arc"/>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_6DE6D5D73C30E65CC06A8A89BCE7D7A7_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_6DE6D5D73C30E65CC06A8A89BCE7D7A7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Financing activities </link:label>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_6DE6D5D73C30E65CC06A8A89BCE7D7A7_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_6DE6D5D73C30E65CC06A8A89BCE7D7A7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Cash Provided by (Used in) Financing Activities [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_6DE6D5D73C30E65CC06A8A89BCE7D7A7" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_6DE6D5D73C30E65CC06A8A89BCE7D7A7" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_6DE6D5D73C30E65CC06A8A89BCE7D7A7" xlink:type="arc"/>
<link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_7EA27DB13EC1DBE0589B8A89BCE7A5A5_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_7EA27DB13EC1DBE0589B8A89BCE7A5A5" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Common share repurchases </link:label>
<link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_7EA27DB13EC1DBE0589B8A89BCE7A5A5_label_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_7EA27DB13EC1DBE0589B8A89BCE7A5A5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments for Repurchase of Common Stock </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_7EA27DB13EC1DBE0589B8A89BCE7A5A5" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_7EA27DB13EC1DBE0589B8A89BCE7A5A5" xlink:to="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_7EA27DB13EC1DBE0589B8A89BCE7A5A5" xlink:type="arc"/>
<link:label id="lab_us-gaap_PaymentsOfDividendsCommonStock_885A7262B3490FEFAB0D8A89BCE7AC02_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsCommonStock_885A7262B3490FEFAB0D8A89BCE7AC02" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Cash dividends paid </link:label>
<link:label id="lab_us-gaap_PaymentsOfDividendsCommonStock_885A7262B3490FEFAB0D8A89BCE7AC02_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsCommonStock_885A7262B3490FEFAB0D8A89BCE7AC02" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments of Ordinary Dividends, Common Stock </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_885A7262B3490FEFAB0D8A89BCE7AC02" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDividendsCommonStock_885A7262B3490FEFAB0D8A89BCE7AC02" xlink:to="lab_us-gaap_PaymentsOfDividendsCommonStock_885A7262B3490FEFAB0D8A89BCE7AC02" xlink:type="arc"/>
<link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_01078D5AD8CDB054FAF48A89BCE87CD9_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_01078D5AD8CDB054FAF48A89BCE87CD9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Proceeds from common stock issuances </link:label>
<link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_01078D5AD8CDB054FAF48A89BCE87CD9_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_01078D5AD8CDB054FAF48A89BCE87CD9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Proceeds from Issuance of Common Stock </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_01078D5AD8CDB054FAF48A89BCE87CD9" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_01078D5AD8CDB054FAF48A89BCE87CD9" xlink:to="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_01078D5AD8CDB054FAF48A89BCE87CD9" xlink:type="arc"/>
<link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_7E6BDACB38657BA1DF548A89BCE83096_negatedLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_7E6BDACB38657BA1DF548A89BCE83096" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Repayments of long-term debt </link:label>
<link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_7E6BDACB38657BA1DF548A89BCE83096_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_7E6BDACB38657BA1DF548A89BCE83096" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Repayments of Long-term Debt </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_7E6BDACB38657BA1DF548A89BCE83096" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfLongTermDebt_7E6BDACB38657BA1DF548A89BCE83096" xlink:to="lab_us-gaap_RepaymentsOfLongTermDebt_7E6BDACB38657BA1DF548A89BCE83096" xlink:type="arc"/>
<link:label id="lab_us-gaap_ProceedsFromRepaymentsOfCommercialPaper_CAB052BEC858AC21F5B78A89BCE8F6CB_verboseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromRepaymentsOfCommercialPaper_CAB052BEC858AC21F5B78A89BCE8F6CB" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> (Repayments of) proceeds from commercial paper, net </link:label>
<link:label id="lab_us-gaap_ProceedsFromRepaymentsOfCommercialPaper_CAB052BEC858AC21F5B78A89BCE8F6CB_label_en-US" xlink:label="lab_us-gaap_ProceedsFromRepaymentsOfCommercialPaper_CAB052BEC858AC21F5B78A89BCE8F6CB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Proceeds from (Repayments of) Commercial Paper </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfCommercialPaper" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfCommercialPaper_CAB052BEC858AC21F5B78A89BCE8F6CB" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromRepaymentsOfCommercialPaper_CAB052BEC858AC21F5B78A89BCE8F6CB" xlink:to="lab_us-gaap_ProceedsFromRepaymentsOfCommercialPaper_CAB052BEC858AC21F5B78A89BCE8F6CB" xlink:type="arc"/>
<link:label id="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_DA39033E8DCD4D3866748A89BCE87CCF_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_DA39033E8DCD4D3866748A89BCE87CCF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Proceeds from issuance of long-term debt </link:label>
<link:label id="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_DA39033E8DCD4D3866748A89BCE87CCF_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_DA39033E8DCD4D3866748A89BCE87CCF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Proceeds from Issuance of Long-term Debt </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_DA39033E8DCD4D3866748A89BCE87CCF" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncreaseDecreaseInCustomerDeposits_CDF160392755541165418A89BCE8192A_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInCustomerDeposits_CDF160392755541165418A89BCE8192A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Customer funds administered </link:label>
<link:label id="lab_us-gaap_IncreaseDecreaseInCustomerDeposits_CDF160392755541165418A89BCE8192A_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInCustomerDeposits_CDF160392755541165418A89BCE8192A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Increase (Decrease) in Customer Deposits </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInCustomerDeposits" xlink:label="loc_us-gaap_IncreaseDecreaseInCustomerDeposits_CDF160392755541165418A89BCE8192A" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_357EB892E268AFC2AA4C8A89BCE87114_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_357EB892E268AFC2AA4C8A89BCE87114" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other, net </link:label>
<link:label id="lab_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_357EB892E268AFC2AA4C8A89BCE87114_label_en-US" xlink:label="lab_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_357EB892E268AFC2AA4C8A89BCE87114" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Proceeds from (Payments for) Other Financing Activities </link:label>
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<link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_B99AC39548CF64AF52958A89BCE8C33B_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_B99AC39548CF64AF52958A89BCE8C33B" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Cash flows (used for) from financing activities </link:label>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_B99AC39548CF64AF52958A89BCE8C33B_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_B99AC39548CF64AF52958A89BCE8C33B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Cash Provided by (Used in) Financing Activities </link:label>
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<link:label id="lab_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_5DCE4AA51F649A4AC52A8A89BCE87E1D_terseLabel_en-US" xlink:label="lab_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_5DCE4AA51F649A4AC52A8A89BCE87E1D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Effect of exchange rate changes on cash and cash equivalents </link:label>
<link:label id="lab_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_5DCE4AA51F649A4AC52A8A89BCE87E1D_label_en-US" xlink:label="lab_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_5DCE4AA51F649A4AC52A8A89BCE87E1D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Effect of Exchange Rate on Cash and Cash Equivalents </link:label>
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<link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_D9CD3B1AC2CDE58A53B58A89BCE8B78A_periodEndLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_D9CD3B1AC2CDE58A53B58A89BCE8B78A" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US"> Cash and cash equivalents, end of period </link:label>
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<link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_CFE46E38293B137127E98A89BCE8620C_label_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_CFE46E38293B137127E98A89BCE8620C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Supplemental Cash Flow Information [Abstract] </link:label>
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<link:label id="lab_us-gaap_InterestPaid_AD379526903CBA35A9738A89BCE89A7B_label_en-US" xlink:label="lab_us-gaap_InterestPaid_AD379526903CBA35A9738A89BCE89A7B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Interest Paid </link:label>
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<link:label id="lab_us-gaap_IncomeTaxesPaidNet_A7CED308A82909A630C28A89BCE843D4_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet_A7CED308A82909A630C28A89BCE843D4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cash paid for income taxes </link:label>
<link:label id="lab_us-gaap_IncomeTaxesPaidNet_A7CED308A82909A630C28A89BCE843D4_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet_A7CED308A82909A630C28A89BCE843D4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Taxes Paid, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_A7CED308A82909A630C28A89BCE843D4" xlink:type="locator"/>
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<link:label id="lab_unh_SupplementalscheduleofnoncashinvestingactivitiesAbstract_AB146F6570F04E3E36668A89BCE8AC4E_terseLabel_en-US" xlink:label="lab_unh_SupplementalscheduleofnoncashinvestingactivitiesAbstract_AB146F6570F04E3E36668A89BCE8AC4E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Supplemental schedule of non-cash investing activities </link:label>
<link:label id="lab_unh_SupplementalscheduleofnoncashinvestingactivitiesAbstract_AB146F6570F04E3E36668A89BCE8AC4E_label_en-US" xlink:label="lab_unh_SupplementalscheduleofnoncashinvestingactivitiesAbstract_AB146F6570F04E3E36668A89BCE8AC4E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Supplemental schedule of non-cash investing activities [Abstract] </link:label>
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<link:loc xlink:href="unh-20171231.xsd#unh_SupplementalscheduleofnoncashinvestingactivitiesAbstract" xlink:label="loc_unh_SupplementalscheduleofnoncashinvestingactivitiesAbstract_AB146F6570F04E3E36668A89BCE8AC4E" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationGiven1_9CD81770E4A3E8A3A0EA8A89BCE84E38_terseLabel_en-US" xlink:label="lab_us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationGiven1_9CD81770E4A3E8A3A0EA8A89BCE84E38" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Common stock issued for acquisitions </link:label>
<link:label id="lab_us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationGiven1_9CD81770E4A3E8A3A0EA8A89BCE84E38_label_en-US" xlink:label="lab_us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationGiven1_9CD81770E4A3E8A3A0EA8A89BCE84E38" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Significant Noncash Transaction, Value of Consideration Given </link:label>
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<link:label id="lab_us-gaap_PropertyPlantAndEquipmentAbstract_5B0ECB45C7A474DBF02750C3FB2C4424_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentAbstract_5B0ECB45C7A474DBF02750C3FB2C4424" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAbstract_5B0ECB45C7A474DBF02750C3FB2C4424" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_224B07E425960BE2BB3A50C3FB2CB900_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_224B07E425960BE2BB3A50C3FB2CB900" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment [Table] </link:label>
<link:label id="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_224B07E425960BE2BB3A50C3FB2CB900_label_en-US" xlink:label="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_224B07E425960BE2BB3A50C3FB2CB900" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment [Table] </link:label>
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<link:label id="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_308A22E0F7D3B536B21550C3FB2C5357_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_308A22E0F7D3B536B21550C3FB2C5357" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Type [Axis] </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_308A22E0F7D3B536B21550C3FB2C5357_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_308A22E0F7D3B536B21550C3FB2C5357" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Type [Axis] </link:label>
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<link:label id="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_5B06F08862FC0950585650C3FB2CF4E4_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_5B06F08862FC0950585650C3FB2CF4E4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Type [Domain] </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_5B06F08862FC0950585650C3FB2CF4E4_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_5B06F08862FC0950585650C3FB2CF4E4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Type [Domain] </link:label>
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<link:label id="lab_us-gaap_RangeMember_DB37E39C301AFDF3292050C3FB2C3DF4_terseLabel_en-US" xlink:label="lab_us-gaap_RangeMember_DB37E39C301AFDF3292050C3FB2C3DF4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Range [Domain] </link:label>
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<link:label id="lab_us-gaap_PropertyPlantAndEquipmentLineItems_223FD44941CAC220BE5E50C3FB2C4BAB_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentLineItems_223FD44941CAC220BE5E50C3FB2C4BAB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment [Line Items] </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentLineItems_223FD44941CAC220BE5E50C3FB2C4BAB_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentLineItems_223FD44941CAC220BE5E50C3FB2C4BAB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment [Line Items] </link:label>
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<link:label id="lab_us-gaap_AssetsAbstract_9FCB21C72F5D4B3AD0007C1AFB126CDE_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract_9FCB21C72F5D4B3AD0007C1AFB126CDE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Assets </link:label>
<link:label id="lab_us-gaap_AssetsAbstract_9FCB21C72F5D4B3AD0007C1AFB126CDE_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract_9FCB21C72F5D4B3AD0007C1AFB126CDE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Assets [Abstract] </link:label>
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<link:label id="lab_us-gaap_AssetsCurrentAbstract_2010D4CAEBE5CBDAD9597C1AFB12BB8B_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsCurrentAbstract_2010D4CAEBE5CBDAD9597C1AFB12BB8B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Current assets: </link:label>
<link:label id="lab_us-gaap_AssetsCurrentAbstract_2010D4CAEBE5CBDAD9597C1AFB12BB8B_label_en-US" xlink:label="lab_us-gaap_AssetsCurrentAbstract_2010D4CAEBE5CBDAD9597C1AFB12BB8B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Assets, Current [Abstract] </link:label>
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<link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_846B7036E4DD4B20B39B7C1AFB12A3B0_verboseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_846B7036E4DD4B20B39B7C1AFB12A3B0" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Cash and cash equivalents </link:label>
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<link:label id="lab_us-gaap_NotesReceivableRelatedPartiesCurrent_592504DE372E769AFD337C1AFB129D77_label_en-US" xlink:label="lab_us-gaap_NotesReceivableRelatedPartiesCurrent_592504DE372E769AFD337C1AFB129D77" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Notes Receivable, Related Parties, Current </link:label>
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<link:label id="lab_us-gaap_OtherAssetsCurrent_7502D3E43B71937015CE7C1AFB1245CA_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsCurrent_7502D3E43B71937015CE7C1AFB1245CA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other current assets </link:label>
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<link:label id="lab_us-gaap_LongTermDebtCurrent_1394441D3C84B5EA56447C1AFB134C4C_label_en-US" xlink:label="lab_us-gaap_LongTermDebtCurrent_1394441D3C84B5EA56447C1AFB134C4C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Current Maturities </link:label>
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<link:label id="lab_us-gaap_LiabilitiesCurrent_FC6C402FDFDD285AEE6B7C1AFB130061_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_FC6C402FDFDD285AEE6B7C1AFB130061" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Total current liabilities </link:label>
<link:label id="lab_us-gaap_LiabilitiesCurrent_FC6C402FDFDD285AEE6B7C1AFB130061_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_FC6C402FDFDD285AEE6B7C1AFB130061" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liabilities, Current </link:label>
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<link:label id="lab_us-gaap_LongTermDebtNoncurrent_5DBAF59EA9E2EC3CE8E07C1AFB134B65_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtNoncurrent_5DBAF59EA9E2EC3CE8E07C1AFB134B65" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term debt, less current maturities </link:label>
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<link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_4B8CF6668501851AF9707C1AFB13E730_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent_4B8CF6668501851AF9707C1AFB13E730" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Liabilities, Noncurrent </link:label>
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<link:label id="lab_us-gaap_Liabilities_F243193B8BC028DD13DA7C1AFB138573_terseLabel_en-US" xlink:label="lab_us-gaap_Liabilities_F243193B8BC028DD13DA7C1AFB138573" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Total liabilities </link:label>
<link:label id="lab_us-gaap_Liabilities_F243193B8BC028DD13DA7C1AFB138573_label_en-US" xlink:label="lab_us-gaap_Liabilities_F243193B8BC028DD13DA7C1AFB138573" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liabilities </link:label>
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<link:label id="lab_us-gaap_PreferredStockValue_011682125FB2D183F7E87C1AFB136B1E_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockValue_011682125FB2D183F7E87C1AFB136B1E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Preferred stock, $0.001 par value - 10 shares authorized; no shares issued or outstanding </link:label>
<link:label id="lab_us-gaap_PreferredStockValue_011682125FB2D183F7E87C1AFB136B1E_label_en-US" xlink:label="lab_us-gaap_PreferredStockValue_011682125FB2D183F7E87C1AFB136B1E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Preferred Stock, Value, Issued </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_011682125FB2D183F7E87C1AFB136B1E" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CommonStockValue_AE87979E9D536D7C194F7C1AFB13671F_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockValue_AE87979E9D536D7C194F7C1AFB13671F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Common stock, $0.01 par value - 3,000 shares authorized; 969 and 952 issued and outstanding </link:label>
<link:label id="lab_us-gaap_CommonStockValue_AE87979E9D536D7C194F7C1AFB13671F_label_en-US" xlink:label="lab_us-gaap_CommonStockValue_AE87979E9D536D7C194F7C1AFB13671F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Common Stock, Value, Issued </link:label>
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<link:label id="lab_us-gaap_AdditionalPaidInCapital_3B80D2A7C2F74C9048A97C1AFB1351D0_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapital_3B80D2A7C2F74C9048A97C1AFB1351D0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Additional paid-in capital </link:label>
<link:label id="lab_us-gaap_AdditionalPaidInCapital_3B80D2A7C2F74C9048A97C1AFB1351D0_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapital_3B80D2A7C2F74C9048A97C1AFB1351D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Additional Paid in Capital </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaap_AdditionalPaidInCapital_3B80D2A7C2F74C9048A97C1AFB1351D0" xlink:type="locator"/>
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<link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_6970F754B6F3D12997907C1AFB14ED90_terseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_6970F754B6F3D12997907C1AFB14ED90" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Retained earnings </link:label>
<link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_6970F754B6F3D12997907C1AFB14ED90_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_6970F754B6F3D12997907C1AFB14ED90" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Retained Earnings (Accumulated Deficit) </link:label>
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<link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_49FE3ADF57A5FA16AFD87C1AFB147289_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_49FE3ADF57A5FA16AFD87C1AFB147289" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accumulated other comprehensive loss </link:label>
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<link:label id="lab_us-gaap_StockholdersEquity_047FE1344DDCA5BE2BC67C1AFB148E78_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_047FE1344DDCA5BE2BC67C1AFB148E78" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Total UnitedHealth Group shareholders’ equity </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LandAndLandImprovements" xlink:label="loc_us-gaap_LandAndLandImprovements_51A7DEF02BDF5F4398BC50C3FA3AE16D" xlink:type="locator"/>
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<link:label id="lab_us-gaap_BuildingsAndImprovementsGross_4145622DABB5DC02144E50C3FA3A3570_terseLabel_en-US" xlink:label="lab_us-gaap_BuildingsAndImprovementsGross_4145622DABB5DC02144E50C3FA3A3570" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Buildings and improvements </link:label>
<link:label id="lab_us-gaap_BuildingsAndImprovementsGross_4145622DABB5DC02144E50C3FA3A3570_label_en-US" xlink:label="lab_us-gaap_BuildingsAndImprovementsGross_4145622DABB5DC02144E50C3FA3A3570" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Buildings and Improvements, Gross </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BuildingsAndImprovementsGross" xlink:label="loc_us-gaap_BuildingsAndImprovementsGross_4145622DABB5DC02144E50C3FA3A3570" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BuildingsAndImprovementsGross_4145622DABB5DC02144E50C3FA3A3570" xlink:to="lab_us-gaap_BuildingsAndImprovementsGross_4145622DABB5DC02144E50C3FA3A3570" xlink:type="arc"/>
<link:label id="lab_us-gaap_MachineryAndEquipmentGross_95FB66179DC95B0FF67050C3FA3A9545_terseLabel_en-US" xlink:label="lab_us-gaap_MachineryAndEquipmentGross_95FB66179DC95B0FF67050C3FA3A9545" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Computer equipment </link:label>
<link:label id="lab_us-gaap_MachineryAndEquipmentGross_95FB66179DC95B0FF67050C3FA3A9545_label_en-US" xlink:label="lab_us-gaap_MachineryAndEquipmentGross_95FB66179DC95B0FF67050C3FA3A9545" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Machinery and Equipment, Gross </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MachineryAndEquipmentGross" xlink:label="loc_us-gaap_MachineryAndEquipmentGross_95FB66179DC95B0FF67050C3FA3A9545" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MachineryAndEquipmentGross_95FB66179DC95B0FF67050C3FA3A9545" xlink:to="lab_us-gaap_MachineryAndEquipmentGross_95FB66179DC95B0FF67050C3FA3A9545" xlink:type="arc"/>
<link:label id="lab_us-gaap_FurnitureAndFixturesGross_5B6A55688DA5649B545450C3FA3A4885_terseLabel_en-US" xlink:label="lab_us-gaap_FurnitureAndFixturesGross_5B6A55688DA5649B545450C3FA3A4885" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Furniture and fixtures </link:label>
<link:label id="lab_us-gaap_FurnitureAndFixturesGross_5B6A55688DA5649B545450C3FA3A4885_label_en-US" xlink:label="lab_us-gaap_FurnitureAndFixturesGross_5B6A55688DA5649B545450C3FA3A4885" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Furniture and Fixtures, Gross </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FurnitureAndFixturesGross" xlink:label="loc_us-gaap_FurnitureAndFixturesGross_5B6A55688DA5649B545450C3FA3A4885" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FurnitureAndFixturesGross_5B6A55688DA5649B545450C3FA3A4885" xlink:to="lab_us-gaap_FurnitureAndFixturesGross_5B6A55688DA5649B545450C3FA3A4885" xlink:type="arc"/>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation_3166B54AE729E70DFB2A50C3FA3AFBDB_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation_3166B54AE729E70DFB2A50C3FA3AFBDB" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Less accumulated depreciation </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation_3166B54AE729E70DFB2A50C3FA3AFBDB_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation_3166B54AE729E70DFB2A50C3FA3AFBDB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Other, Accumulated Depreciation </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation_3166B54AE729E70DFB2A50C3FA3AFBDB" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation_3166B54AE729E70DFB2A50C3FA3AFBDB" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentOtherAccumulatedDepreciation_3166B54AE729E70DFB2A50C3FA3AFBDB" xlink:type="arc"/>
<link:label id="lab_unh_PropertyPlantandEquipmentExcludingCapitalizedComputerSoftwareNet_60F4A443222022ABACF750C3FA3A0268_totalLabel_en-US" xlink:label="lab_unh_PropertyPlantandEquipmentExcludingCapitalizedComputerSoftwareNet_60F4A443222022ABACF750C3FA3A0268" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Property and equipment, net </link:label>
<link:label id="lab_unh_PropertyPlantandEquipmentExcludingCapitalizedComputerSoftwareNet_60F4A443222022ABACF750C3FA3A0268_label_en-US" xlink:label="lab_unh_PropertyPlantandEquipmentExcludingCapitalizedComputerSoftwareNet_60F4A443222022ABACF750C3FA3A0268" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant, and Equipment Excluding Capitalized Computer Software, Net </link:label>
<link:label id="lab_unh_PropertyPlantandEquipmentExcludingCapitalizedComputerSoftwareNet_60F4A443222022ABACF750C3FA3A0268_documentation_en-US" xlink:label="lab_unh_PropertyPlantandEquipmentExcludingCapitalizedComputerSoftwareNet_60F4A443222022ABACF750C3FA3A0268" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Property, Plant, and Equipment Excluding Capitalized Computer Software, Net </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_PropertyPlantandEquipmentExcludingCapitalizedComputerSoftwareNet" xlink:label="loc_unh_PropertyPlantandEquipmentExcludingCapitalizedComputerSoftwareNet_60F4A443222022ABACF750C3FA3A0268" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_PropertyPlantandEquipmentExcludingCapitalizedComputerSoftwareNet_60F4A443222022ABACF750C3FA3A0268" xlink:to="lab_unh_PropertyPlantandEquipmentExcludingCapitalizedComputerSoftwareNet_60F4A443222022ABACF750C3FA3A0268" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalizedComputerSoftwareGross_4202D782E51252B86E5750C3FA3ABC52_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalizedComputerSoftwareGross_4202D782E51252B86E5750C3FA3ABC52" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Capitalized software </link:label>
<link:label id="lab_us-gaap_CapitalizedComputerSoftwareGross_4202D782E51252B86E5750C3FA3ABC52_label_en-US" xlink:label="lab_us-gaap_CapitalizedComputerSoftwareGross_4202D782E51252B86E5750C3FA3ABC52" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capitalized Computer Software, Gross </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalizedComputerSoftwareGross" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareGross_4202D782E51252B86E5750C3FA3ABC52" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalizedComputerSoftwareGross_4202D782E51252B86E5750C3FA3ABC52" xlink:to="lab_us-gaap_CapitalizedComputerSoftwareGross_4202D782E51252B86E5750C3FA3ABC52" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization_26C4ACBC504403DFD65D50C3FA3AF88F_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization_26C4ACBC504403DFD65D50C3FA3AF88F" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Less accumulated amortization </link:label>
<link:label id="lab_us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization_26C4ACBC504403DFD65D50C3FA3AF88F_label_en-US" xlink:label="lab_us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization_26C4ACBC504403DFD65D50C3FA3AF88F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capitalized Computer Software, Accumulated Amortization </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization_26C4ACBC504403DFD65D50C3FA3AF88F" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization_26C4ACBC504403DFD65D50C3FA3AF88F" xlink:to="lab_us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization_26C4ACBC504403DFD65D50C3FA3AF88F" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalizedComputerSoftwareNet_CE675F63BAEA69674B2850C3FA3AAAAE_totalLabel_en-US" xlink:label="lab_us-gaap_CapitalizedComputerSoftwareNet_CE675F63BAEA69674B2850C3FA3AAAAE" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Capitalized software, net </link:label>
<link:label id="lab_us-gaap_CapitalizedComputerSoftwareNet_CE675F63BAEA69674B2850C3FA3AAAAE_label_en-US" xlink:label="lab_us-gaap_CapitalizedComputerSoftwareNet_CE675F63BAEA69674B2850C3FA3AAAAE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capitalized Computer Software, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalizedComputerSoftwareNet" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareNet_CE675F63BAEA69674B2850C3FA3AAAAE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalizedComputerSoftwareNet_CE675F63BAEA69674B2850C3FA3AAAAE" xlink:to="lab_us-gaap_CapitalizedComputerSoftwareNet_CE675F63BAEA69674B2850C3FA3AAAAE" xlink:type="arc"/>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_36F0921411DF70F4DEEE50C3FA3B7C08_totalLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_36F0921411DF70F4DEEE50C3FA3B7C08" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total property, equipment and capitalized software, net </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_36F0921411DF70F4DEEE50C3FA3B7C08_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_36F0921411DF70F4DEEE50C3FA3B7C08" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_36F0921411DF70F4DEEE50C3FA3B7C08" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_36F0921411DF70F4DEEE50C3FA3B7C08" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentNet_36F0921411DF70F4DEEE50C3FA3B7C08" xlink:type="arc"/>
<link:label id="lab_unh_QuarterlyFinancialDataUnauditedAbstract_950C588A90BCF6FF77E650C3FAAA1982_label_en-US" xlink:label="lab_unh_QuarterlyFinancialDataUnauditedAbstract_950C588A90BCF6FF77E650C3FAAA1982" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Quarterly Financial Data (Unaudited) [Abstract] </link:label>
<link:label id="lab_unh_QuarterlyFinancialDataUnauditedAbstract_950C588A90BCF6FF77E650C3FAAA1982_documentation_en-US" xlink:label="lab_unh_QuarterlyFinancialDataUnauditedAbstract_950C588A90BCF6FF77E650C3FAAA1982" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Quarterly Financial Data (Unaudited) [Abstract] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_QuarterlyFinancialDataUnauditedAbstract" xlink:label="loc_unh_QuarterlyFinancialDataUnauditedAbstract_950C588A90BCF6FF77E650C3FAAA1982" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_QuarterlyFinancialDataUnauditedAbstract_950C588A90BCF6FF77E650C3FAAA1982" xlink:to="lab_unh_QuarterlyFinancialDataUnauditedAbstract_950C588A90BCF6FF77E650C3FAAA1982" xlink:type="arc"/>
<link:label id="lab_unh_QuarterlyfinancialdataAxis_051536B51B2844AC50F350C3FAAB5314_terseLabel_en-US" xlink:label="lab_unh_QuarterlyfinancialdataAxis_051536B51B2844AC50F350C3FAAB5314" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Quarterly financial data [Axis] </link:label>
<link:label id="lab_unh_QuarterlyfinancialdataAxis_051536B51B2844AC50F350C3FAAB5314_label_en-US" xlink:label="lab_unh_QuarterlyfinancialdataAxis_051536B51B2844AC50F350C3FAAB5314" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Quarterly financial data [Axis] </link:label>
<link:label id="lab_unh_QuarterlyfinancialdataAxis_051536B51B2844AC50F350C3FAAB5314_documentation_en-US" xlink:label="lab_unh_QuarterlyfinancialdataAxis_051536B51B2844AC50F350C3FAAB5314" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Quarterly financial data [Axis] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_QuarterlyfinancialdataAxis" xlink:label="loc_unh_QuarterlyfinancialdataAxis_051536B51B2844AC50F350C3FAAB5314" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_QuarterlyfinancialdataAxis_051536B51B2844AC50F350C3FAAB5314" xlink:to="lab_unh_QuarterlyfinancialdataAxis_051536B51B2844AC50F350C3FAAB5314" xlink:type="arc"/>
<link:label id="lab_unh_QuarterlyfinancialdataDomain_C1806491413A9FC8999850C3FAABE5E9_terseLabel_en-US" xlink:label="lab_unh_QuarterlyfinancialdataDomain_C1806491413A9FC8999850C3FAABE5E9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Quarterly financial data [Domain] </link:label>
<link:label id="lab_unh_QuarterlyfinancialdataDomain_C1806491413A9FC8999850C3FAABE5E9_label_en-US" xlink:label="lab_unh_QuarterlyfinancialdataDomain_C1806491413A9FC8999850C3FAABE5E9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Quarterly financial data [Domain] </link:label>
<link:label id="lab_unh_QuarterlyfinancialdataDomain_C1806491413A9FC8999850C3FAABE5E9_documentation_en-US" xlink:label="lab_unh_QuarterlyfinancialdataDomain_C1806491413A9FC8999850C3FAABE5E9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> [Domain] for Quarterly financial data [Axis] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_QuarterlyfinancialdataDomain" xlink:label="loc_unh_QuarterlyfinancialdataDomain_C1806491413A9FC8999850C3FAABE5E9" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_QuarterlyfinancialdataDomain_C1806491413A9FC8999850C3FAABE5E9" xlink:to="lab_unh_QuarterlyfinancialdataDomain_C1806491413A9FC8999850C3FAABE5E9" xlink:type="arc"/>
<link:label id="lab_unh_QuarterlyFinancialDataUnauditedMember_247592535F2BAC1BE55050C3FAAB9594_terseLabel_en-US" xlink:label="lab_unh_QuarterlyFinancialDataUnauditedMember_247592535F2BAC1BE55050C3FAAB9594" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Quarterly Financial Data (Unaudited) [Member] </link:label>
<link:label id="lab_unh_QuarterlyFinancialDataUnauditedMember_247592535F2BAC1BE55050C3FAAB9594_label_en-US" xlink:label="lab_unh_QuarterlyFinancialDataUnauditedMember_247592535F2BAC1BE55050C3FAAB9594" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Quarterly Financial Data (Unaudited) [Member] </link:label>
<link:label id="lab_unh_QuarterlyFinancialDataUnauditedMember_247592535F2BAC1BE55050C3FAAB9594_documentation_en-US" xlink:label="lab_unh_QuarterlyFinancialDataUnauditedMember_247592535F2BAC1BE55050C3FAAB9594" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Quarterly Financial Data (Unaudited) [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_QuarterlyFinancialDataUnauditedMember" xlink:label="loc_unh_QuarterlyFinancialDataUnauditedMember_247592535F2BAC1BE55050C3FAAB9594" xlink:type="locator"/>
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<link:label id="lab_us-gaap_Revenues_C31B8603B3EF2C72B7E750C3FAAB8409_verboseLabel_en-US" xlink:label="lab_us-gaap_Revenues_C31B8603B3EF2C72B7E750C3FAAB8409" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Revenues </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_C31B8603B3EF2C72B7E750C3FAAB8409" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Revenues_C31B8603B3EF2C72B7E750C3FAAB8409" xlink:to="lab_us-gaap_Revenues_C31B8603B3EF2C72B7E750C3FAAB8409" xlink:type="arc"/>
<link:label id="lab_us-gaap_CostsAndExpenses_7BC49D16B37211DEB2C550C3FAAB9B23_terseLabel_en-US" xlink:label="lab_us-gaap_CostsAndExpenses_7BC49D16B37211DEB2C550C3FAAB9B23" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Operating costs </link:label>
<link:label id="lab_us-gaap_CostsAndExpenses_7BC49D16B37211DEB2C550C3FAAB9B23_label_en-US" xlink:label="lab_us-gaap_CostsAndExpenses_7BC49D16B37211DEB2C550C3FAAB9B23" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Costs and Expenses </link:label>
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<link:label id="lab_us-gaap_ProductOrServiceAxis_27B822D843AC451AC6CA7C1AFBDB3D54_terseLabel_en-US" xlink:label="lab_us-gaap_ProductOrServiceAxis_27B822D843AC451AC6CA7C1AFBDB3D54" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Products and Services [Axis] </link:label>
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<link:label id="lab_us-gaap_ProductsAndServicesDomain_D6764363B03E37A600807C1AFBDB19C0_terseLabel_en-US" xlink:label="lab_us-gaap_ProductsAndServicesDomain_D6764363B03E37A600807C1AFBDB19C0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Products and Services [Domain] </link:label>
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<link:label id="lab_us-gaap_HealthInsuranceProductLineMember_A3DBAFB6DEB5738AFBEA7C1AFBDB9F29_terseLabel_en-US" xlink:label="lab_us-gaap_HealthInsuranceProductLineMember_A3DBAFB6DEB5738AFBEA7C1AFBDB9F29" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Health Insurance Product Line [Member] </link:label>
<link:label id="lab_us-gaap_HealthInsuranceProductLineMember_A3DBAFB6DEB5738AFBEA7C1AFBDB9F29_label_en-US" xlink:label="lab_us-gaap_HealthInsuranceProductLineMember_A3DBAFB6DEB5738AFBEA7C1AFBDB9F29" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Health Insurance Product Line [Member] </link:label>
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<link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearAxis_82A569D2490C0DFB8BDB7C1AFBDBA74B_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearAxis_82A569D2490C0DFB8BDB7C1AFBDBA74B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Short-duration Insurance Contracts, Accident Year [Axis] </link:label>
<link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearAxis_82A569D2490C0DFB8BDB7C1AFBDBA74B_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearAxis_82A569D2490C0DFB8BDB7C1AFBDBA74B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Short-duration Insurance Contracts, Accident Year [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsAccidentYearAxis" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsAccidentYearAxis_82A569D2490C0DFB8BDB7C1AFBDBA74B" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearDomain_72DBCAEE45A889BAE1B57C1AFBDCF64F_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearDomain_72DBCAEE45A889BAE1B57C1AFBDCF64F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Short-duration Insurance Contracts, Accident Year [Domain] </link:label>
<link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearDomain_72DBCAEE45A889BAE1B57C1AFBDCF64F_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearDomain_72DBCAEE45A889BAE1B57C1AFBDCF64F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Short-duration Insurance Contracts, Accident Year [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsAccidentYearDomain" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsAccidentYearDomain_72DBCAEE45A889BAE1B57C1AFBDCF64F" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2015Member_8F44ED22D48246C216D67C1AFBDCAF1A_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2015Member_8F44ED22D48246C216D67C1AFBDCAF1A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Short-duration Insurance Contracts, Accident Year 2016 [Member] </link:label>
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<link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2016Member_1908C0AB60CB925038DE7C1AFBDCC000_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2016Member_1908C0AB60CB925038DE7C1AFBDCC000" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Short-duration Insurance Contracts, Accident Year 2017 [Member] </link:label>
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<link:label id="lab_us-gaap_ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet_F21697D9B24A4C6B69887C1AFBDC6D1A_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet_F21697D9B24A4C6B69887C1AFBDC6D1A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Net Incurred Medical Costs </link:label>
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<link:label id="lab_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet_19E312664CBDFEA380207C1AFBDCE97C_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet_19E312664CBDFEA380207C1AFBDCE97C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet_19E312664CBDFEA380207C1AFBDCE97C" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_84529B0A78E35E2B2B577C1AFB9BC425_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_84529B0A78E35E2B2B577C1AFB9BC425" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Tax provision at the U.S. federal statutory rate, Amount </link:label>
<link:label id="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_84529B0A78E35E2B2B577C1AFB9BC425_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_84529B0A78E35E2B2B577C1AFB9BC425" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_84529B0A78E35E2B2B577C1AFB9BC425" xlink:type="locator"/>
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<link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_D40814100535D6BC94A67C1AFB9B4FB0_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_D40814100535D6BC94A67C1AFB9B4FB0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Tax provision at the U.S. federal statutory rate, Percent </link:label>
<link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_D40814100535D6BC94A67C1AFB9B4FB0_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_D40814100535D6BC94A67C1AFB9B4FB0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_D40814100535D6BC94A67C1AFB9B4FB0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_D40814100535D6BC94A67C1AFB9B4FB0" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_D40814100535D6BC94A67C1AFB9B4FB0" xlink:type="arc"/>
<link:label id="lab_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_43530C29563C8FE58C847C1AFB9BBE16_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_43530C29563C8FE58C847C1AFB9BBE16" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Change in tax law, Amount </link:label>
<link:label id="lab_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_43530C29563C8FE58C847C1AFB9BBE16_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_43530C29563C8FE58C847C1AFB9BBE16" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_43530C29563C8FE58C847C1AFB9BBE16" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_43530C29563C8FE58C847C1AFB9BBE16" xlink:to="lab_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_43530C29563C8FE58C847C1AFB9BBE16" xlink:type="arc"/>
<link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_F3A83EFD93D4D96F26777C1AFB9B2636_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_F3A83EFD93D4D96F26777C1AFB9B2636" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Change in tax law, Percent </link:label>
<link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_F3A83EFD93D4D96F26777C1AFB9B2636_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_F3A83EFD93D4D96F26777C1AFB9B2636" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_F3A83EFD93D4D96F26777C1AFB9B2636" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_075A72D67FE6C9F4326B7C1AFB9B93D8_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_075A72D67FE6C9F4326B7C1AFB9B93D8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> State income taxes, net of federal benefit, Amount </link:label>
<link:label id="lab_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_075A72D67FE6C9F4326B7C1AFB9B93D8_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_075A72D67FE6C9F4326B7C1AFB9B93D8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_075A72D67FE6C9F4326B7C1AFB9B93D8" xlink:type="locator"/>
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<link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_371FA31DFE88246983617C1AFB9B1610_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_371FA31DFE88246983617C1AFB9B1610" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_371FA31DFE88246983617C1AFB9B1610" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_371FA31DFE88246983617C1AFB9B1610" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_371FA31DFE88246983617C1AFB9B1610" xlink:type="arc"/>
<link:label id="lab_unh_EffectiveIncomeTaxRateReconciliationShareBasedAwardsExcessTaxBenefitAmount_3643FA9AAC6020299CD77C1AFB9BA655_terseLabel_en-US" xlink:label="lab_unh_EffectiveIncomeTaxRateReconciliationShareBasedAwardsExcessTaxBenefitAmount_3643FA9AAC6020299CD77C1AFB9BA655" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Share-based awards - excess tax benefit, Amount </link:label>
<link:label id="lab_unh_EffectiveIncomeTaxRateReconciliationShareBasedAwardsExcessTaxBenefitAmount_3643FA9AAC6020299CD77C1AFB9BA655_label_en-US" xlink:label="lab_unh_EffectiveIncomeTaxRateReconciliationShareBasedAwardsExcessTaxBenefitAmount_3643FA9AAC6020299CD77C1AFB9BA655" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Effective Income Tax Rate Reconciliation, Share Based Awards Excess Tax Benefit, Amount </link:label>
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<link:loc xlink:href="unh-20171231.xsd#unh_EffectiveIncomeTaxRateReconciliationShareBasedAwardsExcessTaxBenefitAmount" xlink:label="loc_unh_EffectiveIncomeTaxRateReconciliationShareBasedAwardsExcessTaxBenefitAmount_3643FA9AAC6020299CD77C1AFB9BA655" xlink:type="locator"/>
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<link:label id="lab_unh_EffectiveIncomeTaxRateReconciliationShareBasedAwardsExcessTaxBenefitPercent_51165C7E6EB7046A1C677C1AFB9BB30D_terseLabel_en-US" xlink:label="lab_unh_EffectiveIncomeTaxRateReconciliationShareBasedAwardsExcessTaxBenefitPercent_51165C7E6EB7046A1C677C1AFB9BB30D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Share-based awards - excess tax benefit, Percent </link:label>
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<link:label id="lab_unh_EffectiveIncomeTaxRateReconciliationShareBasedAwardsExcessTaxBenefitPercent_51165C7E6EB7046A1C677C1AFB9BB30D_documentation_en-US" xlink:label="lab_unh_EffectiveIncomeTaxRateReconciliationShareBasedAwardsExcessTaxBenefitPercent_51165C7E6EB7046A1C677C1AFB9BB30D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Effective Income Tax Rate Reconciliation, Share Based Awards Excess Tax Benefit, Percent </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_EffectiveIncomeTaxRateReconciliationShareBasedAwardsExcessTaxBenefitPercent" xlink:label="loc_unh_EffectiveIncomeTaxRateReconciliationShareBasedAwardsExcessTaxBenefitPercent_51165C7E6EB7046A1C677C1AFB9BB30D" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncomeTaxReconciliationNondeductibleExpense_22280D85DE437C06899E7C1AFB9B6C02_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationNondeductibleExpense_22280D85DE437C06899E7C1AFB9B6C02" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Non-deductible compensation, Amount </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpense" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpense_22280D85DE437C06899E7C1AFB9B6C02" xlink:type="locator"/>
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<link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_6C926CDFDC8B9750348B50C3FB43E2CF_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_6C926CDFDC8B9750348B50C3FB43E2CF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Basic weighted-average number of common shares outstanding </link:label>
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<link:label id="lab_us-gaap_CustomerRelatedIntangibleAssetsMember_DB867DD7C2720D87E59550C3FB0353B6_terseLabel_en-US" xlink:label="lab_us-gaap_CustomerRelatedIntangibleAssetsMember_DB867DD7C2720D87E59550C3FB0353B6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Customer-Related Intangible Assets [Member] </link:label>
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<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsLineItems_E47CAB3D182DA1D5380D50C3FB049A88_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsLineItems_E47CAB3D182DA1D5380D50C3FB049A88" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Intangible Assets [Line Items] </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsLineItems_E47CAB3D182DA1D5380D50C3FB049A88_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsLineItems_E47CAB3D182DA1D5380D50C3FB049A88" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_E47CAB3D182DA1D5380D50C3FB049A88" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_E47CAB3D182DA1D5380D50C3FB049A88" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsLineItems_E47CAB3D182DA1D5380D50C3FB049A88" xlink:type="arc"/>
<link:label id="lab_us-gaap_IntangibleAssetsGrossExcludingGoodwill_CF2581422FF4FFA1D01C50C3FB042FE4_terseLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsGrossExcludingGoodwill_CF2581422FF4FFA1D01C50C3FB042FE4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Intangible Assets, Gross (Excluding Goodwill) </link:label>
<link:label id="lab_us-gaap_IntangibleAssetsGrossExcludingGoodwill_CF2581422FF4FFA1D01C50C3FB042FE4_label_en-US" xlink:label="lab_us-gaap_IntangibleAssetsGrossExcludingGoodwill_CF2581422FF4FFA1D01C50C3FB042FE4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Intangible Assets, Gross (Excluding Goodwill) </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_CF2581422FF4FFA1D01C50C3FB042FE4" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_CF2581422FF4FFA1D01C50C3FB042FE4" xlink:to="lab_us-gaap_IntangibleAssetsGrossExcludingGoodwill_CF2581422FF4FFA1D01C50C3FB042FE4" xlink:type="arc"/>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_0C59B505FE173DD1795F50C3FB044381_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_0C59B505FE173DD1795F50C3FB044381" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Accumulated Amortization </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_0C59B505FE173DD1795F50C3FB044381_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_0C59B505FE173DD1795F50C3FB044381" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Accumulated Amortization </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_0C59B505FE173DD1795F50C3FB044381" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_0C59B505FE173DD1795F50C3FB044381" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_0C59B505FE173DD1795F50C3FB044381" xlink:type="arc"/>
<link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_2DBB6FDA49CCC23C1CCF50C3FB04CD1D_totalLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_2DBB6FDA49CCC23C1CCF50C3FB04CD1D" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Intangible Assets, Net (Excluding Goodwill) </link:label>
<link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_2DBB6FDA49CCC23C1CCF50C3FB04CD1D_label_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_2DBB6FDA49CCC23C1CCF50C3FB04CD1D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Intangible Assets, Net (Excluding Goodwill) </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_2DBB6FDA49CCC23C1CCF50C3FB04CD1D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_2DBB6FDA49CCC23C1CCF50C3FB04CD1D" xlink:to="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_2DBB6FDA49CCC23C1CCF50C3FB04CD1D" xlink:type="arc"/>
<link:label id="lab_us-gaap_ScheduleOfOperatingLeasedAssetsTable_647030A1353B43AFE4B350C3F9E06BC0_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfOperatingLeasedAssetsTable_647030A1353B43AFE4B350C3F9E06BC0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of Operating Leased Assets [Table] </link:label>
<link:label id="lab_us-gaap_ScheduleOfOperatingLeasedAssetsTable_647030A1353B43AFE4B350C3F9E06BC0_label_en-US" xlink:label="lab_us-gaap_ScheduleOfOperatingLeasedAssetsTable_647030A1353B43AFE4B350C3F9E06BC0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Operating Leased Assets [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfOperatingLeasedAssetsTable" xlink:label="loc_us-gaap_ScheduleOfOperatingLeasedAssetsTable_647030A1353B43AFE4B350C3F9E06BC0" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LeaseArrangementTypeAxis_7D2AB6F1938C11BBF81650C3F9E0E711_terseLabel_en-US" xlink:label="lab_us-gaap_LeaseArrangementTypeAxis_7D2AB6F1938C11BBF81650C3F9E0E711" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Lease Arrangement, Type [Axis] </link:label>
<link:label id="lab_us-gaap_LeaseArrangementTypeAxis_7D2AB6F1938C11BBF81650C3F9E0E711_label_en-US" xlink:label="lab_us-gaap_LeaseArrangementTypeAxis_7D2AB6F1938C11BBF81650C3F9E0E711" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lease Arrangement, Type [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LeaseArrangementTypeAxis" xlink:label="loc_us-gaap_LeaseArrangementTypeAxis_7D2AB6F1938C11BBF81650C3F9E0E711" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LeaseArrangementTypeDomain_DE1E8C0B0135C104689750C3F9E05D88_terseLabel_en-US" xlink:label="lab_us-gaap_LeaseArrangementTypeDomain_DE1E8C0B0135C104689750C3F9E05D88" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Lease Arrangement, Type [Domain] </link:label>
<link:label id="lab_us-gaap_LeaseArrangementTypeDomain_DE1E8C0B0135C104689750C3F9E05D88_label_en-US" xlink:label="lab_us-gaap_LeaseArrangementTypeDomain_DE1E8C0B0135C104689750C3F9E05D88" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lease Arrangement, Type [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LeaseArrangementTypeDomain" xlink:label="loc_us-gaap_LeaseArrangementTypeDomain_DE1E8C0B0135C104689750C3F9E05D88" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CounterpartyNameAxis_EA0E9E0B686A70AF84BF50C3F9E04A6F_terseLabel_en-US" xlink:label="lab_us-gaap_CounterpartyNameAxis_EA0E9E0B686A70AF84BF50C3F9E04A6F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Counterparty Name [Axis] </link:label>
<link:label id="lab_us-gaap_CounterpartyNameAxis_EA0E9E0B686A70AF84BF50C3F9E04A6F_label_en-US" xlink:label="lab_us-gaap_CounterpartyNameAxis_EA0E9E0B686A70AF84BF50C3F9E04A6F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Counterparty Name [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CounterpartyNameAxis" xlink:label="loc_us-gaap_CounterpartyNameAxis_EA0E9E0B686A70AF84BF50C3F9E04A6F" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CounterpartyNameAxis_EA0E9E0B686A70AF84BF50C3F9E04A6F" xlink:to="lab_us-gaap_CounterpartyNameAxis_EA0E9E0B686A70AF84BF50C3F9E04A6F" xlink:type="arc"/>
<link:label id="lab_us-gaap_RepurchaseAgreementCounterpartyNameDomain_8886AD4494D15DB9EC2650C3F9E0A9E1_terseLabel_en-US" xlink:label="lab_us-gaap_RepurchaseAgreementCounterpartyNameDomain_8886AD4494D15DB9EC2650C3F9E0A9E1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Counterparty Name [Domain] </link:label>
<link:label id="lab_us-gaap_RepurchaseAgreementCounterpartyNameDomain_8886AD4494D15DB9EC2650C3F9E0A9E1_label_en-US" xlink:label="lab_us-gaap_RepurchaseAgreementCounterpartyNameDomain_8886AD4494D15DB9EC2650C3F9E0A9E1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Counterparty Name [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_8886AD4494D15DB9EC2650C3F9E0A9E1" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OperatingLeasedAssetsLineItems_11F49543EB9B775DFA7650C3F9E1C2EC_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasedAssetsLineItems_11F49543EB9B775DFA7650C3F9E1C2EC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Operating Leased Assets [Line Items] </link:label>
<link:label id="lab_us-gaap_OperatingLeasedAssetsLineItems_11F49543EB9B775DFA7650C3F9E1C2EC_label_en-US" xlink:label="lab_us-gaap_OperatingLeasedAssetsLineItems_11F49543EB9B775DFA7650C3F9E1C2EC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leased Assets [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasedAssetsLineItems" xlink:label="loc_us-gaap_OperatingLeasedAssetsLineItems_11F49543EB9B775DFA7650C3F9E1C2EC" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_B2964030BAB682A63F2050C3F9E19ED3_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_B2964030BAB682A63F2050C3F9E19ED3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2017 </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_B2964030BAB682A63F2050C3F9E19ED3_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_B2964030BAB682A63F2050C3F9E19ED3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments Due, Next Twelve Months </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_B2964030BAB682A63F2050C3F9E19ED3" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_4F480C6637B68D2B033250C3F9E14862_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_4F480C6637B68D2B033250C3F9E14862" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2018 </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_4F480C6637B68D2B033250C3F9E14862_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_4F480C6637B68D2B033250C3F9E14862" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due in Two Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_4F480C6637B68D2B033250C3F9E14862" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E98385132BC750BE4C3250C3F9E13E29_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E98385132BC750BE4C3250C3F9E13E29" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2019 </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E98385132BC750BE4C3250C3F9E13E29_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E98385132BC750BE4C3250C3F9E13E29" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due in Three Years </link:label>
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<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_64867BD2302B56E2A5F250C3F9E140A6_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_64867BD2302B56E2A5F250C3F9E140A6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2020 </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_64867BD2302B56E2A5F250C3F9E140A6_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_64867BD2302B56E2A5F250C3F9E140A6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due in Four Years </link:label>
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<link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_6475F27B1B815CFA01067C1A9156F9A0_negatedTotalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_6475F27B1B815CFA01067C1A9156F9A0" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="en-US"> Total reclassification adjustment, net of tax </link:label>
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<link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_77EDAA23EA2A5813680A7C1A91562541_totalLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_77EDAA23EA2A5813680A7C1A91562541" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Comprehensive income </link:label>
<link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_77EDAA23EA2A5813680A7C1A91562541_label_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_77EDAA23EA2A5813680A7C1A91562541" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_147C95379260F6545F8E7C1A9156FD02" xlink:type="locator"/>
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<link:label id="lab_unh_FloatingrateNotesDueJanuary2017Member_2F7ED619A8C1EE3983828A89F29E3BE3_label_en-US" xlink:label="lab_unh_FloatingrateNotesDueJanuary2017Member_2F7ED619A8C1EE3983828A89F29E3BE3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Floating-rate Notes Due January 2017 [Member] </link:label>
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<link:loc xlink:href="unh-20171231.xsd#unh_FloatingrateNotesDueJanuary2017Member" xlink:label="loc_unh_FloatingrateNotesDueJanuary2017Member_2F7ED619A8C1EE3983828A89F29E3BE3" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_FloatingrateNotesDueJanuary2017Member_2F7ED619A8C1EE3983828A89F29E3BE3" xlink:to="lab_unh_FloatingrateNotesDueJanuary2017Member_2F7ED619A8C1EE3983828A89F29E3BE3" xlink:type="arc"/>
<link:label id="lab_unh_SixPercentSeniorUnsecuredNotesDueJuneTwoThousandSeventeenMember_F0E034536F10A81746DA8A89F29E256A_terseLabel_en-US" xlink:label="lab_unh_SixPercentSeniorUnsecuredNotesDueJuneTwoThousandSeventeenMember_F0E034536F10A81746DA8A89F29E256A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 6.000% Notes Due June 2017 [Member] </link:label>
<link:label id="lab_unh_SixPercentSeniorUnsecuredNotesDueJuneTwoThousandSeventeenMember_F0E034536F10A81746DA8A89F29E256A_label_en-US" xlink:label="lab_unh_SixPercentSeniorUnsecuredNotesDueJuneTwoThousandSeventeenMember_F0E034536F10A81746DA8A89F29E256A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Six Percent Senior Unsecured Notes Due June Two Thousand Seventeen [Member] </link:label>
<link:label id="lab_unh_SixPercentSeniorUnsecuredNotesDueJuneTwoThousandSeventeenMember_F0E034536F10A81746DA8A89F29E256A_documentation_en-US" xlink:label="lab_unh_SixPercentSeniorUnsecuredNotesDueJuneTwoThousandSeventeenMember_F0E034536F10A81746DA8A89F29E256A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Senior Unsecured Notes 6.0 Percent Due June 2017 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_SixPercentSeniorUnsecuredNotesDueJuneTwoThousandSeventeenMember" xlink:label="loc_unh_SixPercentSeniorUnsecuredNotesDueJuneTwoThousandSeventeenMember_F0E034536F10A81746DA8A89F29E256A" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_SixPercentSeniorUnsecuredNotesDueJuneTwoThousandSeventeenMember_F0E034536F10A81746DA8A89F29E256A" xlink:to="lab_unh_SixPercentSeniorUnsecuredNotesDueJuneTwoThousandSeventeenMember_F0E034536F10A81746DA8A89F29E256A" xlink:type="arc"/>
<link:label id="lab_unh_A1.450notesdueJuly2017Member_4B545D2B26BD7085DF7A8A89F29FE687_terseLabel_en-US" xlink:label="lab_unh_A1.450notesdueJuly2017Member_4B545D2B26BD7085DF7A8A89F29FE687" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 1.450% Notes Due July 2017 [Member] </link:label>
<link:label id="lab_unh_A1.450notesdueJuly2017Member_4B545D2B26BD7085DF7A8A89F29FE687_label_en-US" xlink:label="lab_unh_A1.450notesdueJuly2017Member_4B545D2B26BD7085DF7A8A89F29FE687" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 1.450% notes due July 2017 [Member] </link:label>
<link:label id="lab_unh_A1.450notesdueJuly2017Member_4B545D2B26BD7085DF7A8A89F29FE687_documentation_en-US" xlink:label="lab_unh_A1.450notesdueJuly2017Member_4B545D2B26BD7085DF7A8A89F29FE687" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 1.450% notes due July 2017 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A1.450notesdueJuly2017Member" xlink:label="loc_unh_A1.450notesdueJuly2017Member_4B545D2B26BD7085DF7A8A89F29FE687" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A1.450notesdueJuly2017Member_4B545D2B26BD7085DF7A8A89F29FE687" xlink:to="lab_unh_A1.450notesdueJuly2017Member_4B545D2B26BD7085DF7A8A89F29FE687" xlink:type="arc"/>
<link:label id="lab_unh_A1400SeniorUnsecuredNotesDueOctober2017Member_F18675AF4C428BB7AACF8A89F29F6162_terseLabel_en-US" xlink:label="lab_unh_A1400SeniorUnsecuredNotesDueOctober2017Member_F18675AF4C428BB7AACF8A89F29F6162" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 1.400% Notes Due October 2017 [Member] </link:label>
<link:label id="lab_unh_A1400SeniorUnsecuredNotesDueOctober2017Member_F18675AF4C428BB7AACF8A89F29F6162_label_en-US" xlink:label="lab_unh_A1400SeniorUnsecuredNotesDueOctober2017Member_F18675AF4C428BB7AACF8A89F29F6162" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 1.400% Senior Unsecured Notes due October 2017 [Member] </link:label>
<link:label id="lab_unh_A1400SeniorUnsecuredNotesDueOctober2017Member_F18675AF4C428BB7AACF8A89F29F6162_documentation_en-US" xlink:label="lab_unh_A1400SeniorUnsecuredNotesDueOctober2017Member_F18675AF4C428BB7AACF8A89F29F6162" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 1.400% Senior Unsecured Notes due October 2017 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A1400SeniorUnsecuredNotesDueOctober2017Member" xlink:label="loc_unh_A1400SeniorUnsecuredNotesDueOctober2017Member_F18675AF4C428BB7AACF8A89F29F6162" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A1400SeniorUnsecuredNotesDueOctober2017Member_F18675AF4C428BB7AACF8A89F29F6162" xlink:to="lab_unh_A1400SeniorUnsecuredNotesDueOctober2017Member_F18675AF4C428BB7AACF8A89F29F6162" xlink:type="arc"/>
<link:label id="lab_unh_SixPointZeroPercentSeniorUnsecuredNotesDueNovember2017Member_58921B5B6770E895AFC78A89F29F778B_terseLabel_en-US" xlink:label="lab_unh_SixPointZeroPercentSeniorUnsecuredNotesDueNovember2017Member_58921B5B6770E895AFC78A89F29F778B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 6.000% Notes Due November 2017 [Member] </link:label>
<link:label id="lab_unh_SixPointZeroPercentSeniorUnsecuredNotesDueNovember2017Member_58921B5B6770E895AFC78A89F29F778B_label_en-US" xlink:label="lab_unh_SixPointZeroPercentSeniorUnsecuredNotesDueNovember2017Member_58921B5B6770E895AFC78A89F29F778B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Six Point Zero Percent Senior Unsecured Notes Due November 2017 [Member] </link:label>
<link:label id="lab_unh_SixPointZeroPercentSeniorUnsecuredNotesDueNovember2017Member_58921B5B6770E895AFC78A89F29F778B_documentation_en-US" xlink:label="lab_unh_SixPointZeroPercentSeniorUnsecuredNotesDueNovember2017Member_58921B5B6770E895AFC78A89F29F778B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Senior Unsecured Notes 6.0 Percent Due November 2017 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_SixPointZeroPercentSeniorUnsecuredNotesDueNovember2017Member" xlink:label="loc_unh_SixPointZeroPercentSeniorUnsecuredNotesDueNovember2017Member_58921B5B6770E895AFC78A89F29F778B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_SixPointZeroPercentSeniorUnsecuredNotesDueNovember2017Member_58921B5B6770E895AFC78A89F29F778B" xlink:to="lab_unh_SixPointZeroPercentSeniorUnsecuredNotesDueNovember2017Member_58921B5B6770E895AFC78A89F29F778B" xlink:type="arc"/>
<link:label id="lab_unh_A1.400SeniorUnsecuredNotesDueDecember2017Member_80C6B91C7326E955E6FA8A89F29FA8C8_terseLabel_en-US" xlink:label="lab_unh_A1.400SeniorUnsecuredNotesDueDecember2017Member_80C6B91C7326E955E6FA8A89F29FA8C8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 1.400% Notes Due December 2017 [Member] </link:label>
<link:label id="lab_unh_A1.400SeniorUnsecuredNotesDueDecember2017Member_80C6B91C7326E955E6FA8A89F29FA8C8_label_en-US" xlink:label="lab_unh_A1.400SeniorUnsecuredNotesDueDecember2017Member_80C6B91C7326E955E6FA8A89F29FA8C8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 1.400% Senior Unsecured Notes Due December 2017 [Member] </link:label>
<link:label id="lab_unh_A1.400SeniorUnsecuredNotesDueDecember2017Member_80C6B91C7326E955E6FA8A89F29FA8C8_documentation_en-US" xlink:label="lab_unh_A1.400SeniorUnsecuredNotesDueDecember2017Member_80C6B91C7326E955E6FA8A89F29FA8C8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 1.400% Senior Unsecured Notes Due December 2017 </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A1.400SeniorUnsecuredNotesDueDecember2017Member" xlink:label="loc_unh_A1.400SeniorUnsecuredNotesDueDecember2017Member_80C6B91C7326E955E6FA8A89F29FA8C8" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A1.400SeniorUnsecuredNotesDueDecember2017Member_80C6B91C7326E955E6FA8A89F29FA8C8" xlink:to="lab_unh_A1.400SeniorUnsecuredNotesDueDecember2017Member_80C6B91C7326E955E6FA8A89F29FA8C8" xlink:type="arc"/>
<link:label id="lab_unh_SixPointZeroSeniorUnsecuredNotesDueFebruaryTwoThousandEighteenMember_F496E1BE61D9B70C9D788A89F29FBDAB_terseLabel_en-US" xlink:label="lab_unh_SixPointZeroSeniorUnsecuredNotesDueFebruaryTwoThousandEighteenMember_F496E1BE61D9B70C9D788A89F29FBDAB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 6.000% Notes Due February 2018 [Member] </link:label>
<link:label id="lab_unh_SixPointZeroSeniorUnsecuredNotesDueFebruaryTwoThousandEighteenMember_F496E1BE61D9B70C9D788A89F29FBDAB_label_en-US" xlink:label="lab_unh_SixPointZeroSeniorUnsecuredNotesDueFebruaryTwoThousandEighteenMember_F496E1BE61D9B70C9D788A89F29FBDAB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Six Point Zero Senior Unsecured Notes Due February Two Thousand Eighteen [Member] </link:label>
<link:label id="lab_unh_SixPointZeroSeniorUnsecuredNotesDueFebruaryTwoThousandEighteenMember_F496E1BE61D9B70C9D788A89F29FBDAB_documentation_en-US" xlink:label="lab_unh_SixPointZeroSeniorUnsecuredNotesDueFebruaryTwoThousandEighteenMember_F496E1BE61D9B70C9D788A89F29FBDAB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Senior Unsecured Notes 6.0 Percent Due February 2018 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_SixPointZeroSeniorUnsecuredNotesDueFebruaryTwoThousandEighteenMember" xlink:label="loc_unh_SixPointZeroSeniorUnsecuredNotesDueFebruaryTwoThousandEighteenMember_F496E1BE61D9B70C9D788A89F29FBDAB" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_SixPointZeroSeniorUnsecuredNotesDueFebruaryTwoThousandEighteenMember_F496E1BE61D9B70C9D788A89F29FBDAB" xlink:to="lab_unh_SixPointZeroSeniorUnsecuredNotesDueFebruaryTwoThousandEighteenMember_F496E1BE61D9B70C9D788A89F29FBDAB" xlink:type="arc"/>
<link:label id="lab_unh_A1.900notesdueJuly2018Member_1F3BCED11E8E71852BBD8A89F29F807C_terseLabel_en-US" xlink:label="lab_unh_A1.900notesdueJuly2018Member_1F3BCED11E8E71852BBD8A89F29F807C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 1.900% Notes Due July 2018 [Member] </link:label>
<link:label id="lab_unh_A1.900notesdueJuly2018Member_1F3BCED11E8E71852BBD8A89F29F807C_label_en-US" xlink:label="lab_unh_A1.900notesdueJuly2018Member_1F3BCED11E8E71852BBD8A89F29F807C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 1.900% notes due July 2018 [Member] </link:label>
<link:label id="lab_unh_A1.900notesdueJuly2018Member_1F3BCED11E8E71852BBD8A89F29F807C_documentation_en-US" xlink:label="lab_unh_A1.900notesdueJuly2018Member_1F3BCED11E8E71852BBD8A89F29F807C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 1.900% notes due July 2018 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A1.900notesdueJuly2018Member" xlink:label="loc_unh_A1.900notesdueJuly2018Member_1F3BCED11E8E71852BBD8A89F29F807C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A1.900notesdueJuly2018Member_1F3BCED11E8E71852BBD8A89F29F807C" xlink:to="lab_unh_A1.900notesdueJuly2018Member_1F3BCED11E8E71852BBD8A89F29F807C" xlink:type="arc"/>
<link:label id="lab_unh_A1.700NotesdueFebruary2019Member_B1C80DF14184446419E48A89F29FE9AC_terseLabel_en-US" xlink:label="lab_unh_A1.700NotesdueFebruary2019Member_B1C80DF14184446419E48A89F29FE9AC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 1.700% Notes due February 2019 [Member] </link:label>
<link:label id="lab_unh_A1.700NotesdueFebruary2019Member_B1C80DF14184446419E48A89F29FE9AC_label_en-US" xlink:label="lab_unh_A1.700NotesdueFebruary2019Member_B1C80DF14184446419E48A89F29FE9AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 1.700% Notes due February 2019 [Member] </link:label>
<link:label id="lab_unh_A1.700NotesdueFebruary2019Member_B1C80DF14184446419E48A89F29FE9AC_documentation_en-US" xlink:label="lab_unh_A1.700NotesdueFebruary2019Member_B1C80DF14184446419E48A89F29FE9AC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 1.700% Notes due February 2019 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A1.700NotesdueFebruary2019Member" xlink:label="loc_unh_A1.700NotesdueFebruary2019Member_B1C80DF14184446419E48A89F29FE9AC" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A1.700NotesdueFebruary2019Member_B1C80DF14184446419E48A89F29FE9AC" xlink:to="lab_unh_A1.700NotesdueFebruary2019Member_B1C80DF14184446419E48A89F29FE9AC" xlink:type="arc"/>
<link:label id="lab_unh_A1625SeniorUnsecuredNotesDueMarch2019Member_3E81BC0824C169D7A7448A89F29FB781_terseLabel_en-US" xlink:label="lab_unh_A1625SeniorUnsecuredNotesDueMarch2019Member_3E81BC0824C169D7A7448A89F29FB781" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 1.625% Notes Due March 2019 [Member] </link:label>
<link:label id="lab_unh_A1625SeniorUnsecuredNotesDueMarch2019Member_3E81BC0824C169D7A7448A89F29FB781_label_en-US" xlink:label="lab_unh_A1625SeniorUnsecuredNotesDueMarch2019Member_3E81BC0824C169D7A7448A89F29FB781" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 1.625% Senior Unsecured Notes Due March 2019 [Member] </link:label>
<link:label id="lab_unh_A1625SeniorUnsecuredNotesDueMarch2019Member_3E81BC0824C169D7A7448A89F29FB781_documentation_en-US" xlink:label="lab_unh_A1625SeniorUnsecuredNotesDueMarch2019Member_3E81BC0824C169D7A7448A89F29FB781" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 1.625% Senior Unsecured Notes Due March 2019 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A1625SeniorUnsecuredNotesDueMarch2019Member" xlink:label="loc_unh_A1625SeniorUnsecuredNotesDueMarch2019Member_3E81BC0824C169D7A7448A89F29FB781" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A1625SeniorUnsecuredNotesDueMarch2019Member_3E81BC0824C169D7A7448A89F29FB781" xlink:to="lab_unh_A1625SeniorUnsecuredNotesDueMarch2019Member_3E81BC0824C169D7A7448A89F29FB781" xlink:type="arc"/>
<link:label id="lab_unh_A2.300SeniorUnsecuredNotesDueDecember2019Member_6FD3AEEDFB72701F645E8A89F29FDA08_terseLabel_en-US" xlink:label="lab_unh_A2.300SeniorUnsecuredNotesDueDecember2019Member_6FD3AEEDFB72701F645E8A89F29FDA08" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2.300% Notes Due December 2019 [Member] </link:label>
<link:label id="lab_unh_A2.300SeniorUnsecuredNotesDueDecember2019Member_6FD3AEEDFB72701F645E8A89F29FDA08_label_en-US" xlink:label="lab_unh_A2.300SeniorUnsecuredNotesDueDecember2019Member_6FD3AEEDFB72701F645E8A89F29FDA08" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 2.300% Senior Unsecured Notes Due December 2019 [Member] </link:label>
<link:label id="lab_unh_A2.300SeniorUnsecuredNotesDueDecember2019Member_6FD3AEEDFB72701F645E8A89F29FDA08_documentation_en-US" xlink:label="lab_unh_A2.300SeniorUnsecuredNotesDueDecember2019Member_6FD3AEEDFB72701F645E8A89F29FDA08" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 2.300% Senior Unsecured Notes Due December 2019 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A2.300SeniorUnsecuredNotesDueDecember2019Member" xlink:label="loc_unh_A2.300SeniorUnsecuredNotesDueDecember2019Member_6FD3AEEDFB72701F645E8A89F29FDA08" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A2.300SeniorUnsecuredNotesDueDecember2019Member_6FD3AEEDFB72701F645E8A89F29FDA08" xlink:to="lab_unh_A2.300SeniorUnsecuredNotesDueDecember2019Member_6FD3AEEDFB72701F645E8A89F29FDA08" xlink:type="arc"/>
<link:label id="lab_unh_A2.700SeniorUnsecuredNotesdueJuly2020Member_12FC0DCC295BFC235E4D8A89F29F7E50_terseLabel_en-US" xlink:label="lab_unh_A2.700SeniorUnsecuredNotesdueJuly2020Member_12FC0DCC295BFC235E4D8A89F29F7E50" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2.700% Notes Due July 2020 [Member] </link:label>
<link:label id="lab_unh_A2.700SeniorUnsecuredNotesdueJuly2020Member_12FC0DCC295BFC235E4D8A89F29F7E50_label_en-US" xlink:label="lab_unh_A2.700SeniorUnsecuredNotesdueJuly2020Member_12FC0DCC295BFC235E4D8A89F29F7E50" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 2.700% Senior Unsecured Notes due July 2020 [Member] </link:label>
<link:label id="lab_unh_A2.700SeniorUnsecuredNotesdueJuly2020Member_12FC0DCC295BFC235E4D8A89F29F7E50_documentation_en-US" xlink:label="lab_unh_A2.700SeniorUnsecuredNotesdueJuly2020Member_12FC0DCC295BFC235E4D8A89F29F7E50" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 2.700% Senior Unsecured Notes due July 2020 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A2.700SeniorUnsecuredNotesdueJuly2020Member" xlink:label="loc_unh_A2.700SeniorUnsecuredNotesdueJuly2020Member_12FC0DCC295BFC235E4D8A89F29F7E50" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A2.700SeniorUnsecuredNotesdueJuly2020Member_12FC0DCC295BFC235E4D8A89F29F7E50" xlink:to="lab_unh_A2.700SeniorUnsecuredNotesdueJuly2020Member_12FC0DCC295BFC235E4D8A89F29F7E50" xlink:type="arc"/>
<link:label id="lab_unh_FloatingratenotesdueOctober2020Member_92249C26EEC67A7942428A89F29F4564_terseLabel_en-US" xlink:label="lab_unh_FloatingratenotesdueOctober2020Member_92249C26EEC67A7942428A89F29F4564" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Floating rate notes due October 2020 [Member] </link:label>
<link:label id="lab_unh_FloatingratenotesdueOctober2020Member_92249C26EEC67A7942428A89F29F4564_label_en-US" xlink:label="lab_unh_FloatingratenotesdueOctober2020Member_92249C26EEC67A7942428A89F29F4564" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Floating rate notes due October 2020 [Member] </link:label>
<link:label id="lab_unh_FloatingratenotesdueOctober2020Member_92249C26EEC67A7942428A89F29F4564_documentation_en-US" xlink:label="lab_unh_FloatingratenotesdueOctober2020Member_92249C26EEC67A7942428A89F29F4564" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Floating rate notes due October 2020 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_FloatingratenotesdueOctober2020Member" xlink:label="loc_unh_FloatingratenotesdueOctober2020Member_92249C26EEC67A7942428A89F29F4564" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_FloatingratenotesdueOctober2020Member_92249C26EEC67A7942428A89F29F4564" xlink:to="lab_unh_FloatingratenotesdueOctober2020Member_92249C26EEC67A7942428A89F29F4564" xlink:type="arc"/>
<link:label id="lab_unh_ThreePointEightSevenFivePercentSeniorUnsecuredNotesDueOctober2020Member_E3284888BB4C97AB6C388A89F29F158A_terseLabel_en-US" xlink:label="lab_unh_ThreePointEightSevenFivePercentSeniorUnsecuredNotesDueOctober2020Member_E3284888BB4C97AB6C388A89F29F158A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 3.875% Notes Due October 2020 [Member] </link:label>
<link:label id="lab_unh_ThreePointEightSevenFivePercentSeniorUnsecuredNotesDueOctober2020Member_E3284888BB4C97AB6C388A89F29F158A_label_en-US" xlink:label="lab_unh_ThreePointEightSevenFivePercentSeniorUnsecuredNotesDueOctober2020Member_E3284888BB4C97AB6C388A89F29F158A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Three point eight seven five percent Senior Unsecured Notes due October 2020 [Member] </link:label>
<link:label id="lab_unh_ThreePointEightSevenFivePercentSeniorUnsecuredNotesDueOctober2020Member_E3284888BB4C97AB6C388A89F29F158A_documentation_en-US" xlink:label="lab_unh_ThreePointEightSevenFivePercentSeniorUnsecuredNotesDueOctober2020Member_E3284888BB4C97AB6C388A89F29F158A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Three point eight seven five percent Senior Unsecured Notes due October 2020 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_ThreePointEightSevenFivePercentSeniorUnsecuredNotesDueOctober2020Member" xlink:label="loc_unh_ThreePointEightSevenFivePercentSeniorUnsecuredNotesDueOctober2020Member_E3284888BB4C97AB6C388A89F29F158A" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_ThreePointEightSevenFivePercentSeniorUnsecuredNotesDueOctober2020Member_E3284888BB4C97AB6C388A89F29F158A" xlink:to="lab_unh_ThreePointEightSevenFivePercentSeniorUnsecuredNotesDueOctober2020Member_E3284888BB4C97AB6C388A89F29F158A" xlink:type="arc"/>
<link:label id="lab_unh_FourPointSevenPercentageSeniorUnsecuredNotesDueFebruaryTwoThousandTwentyOneMember_445D14A5F69520B105FB8A89F29F4B9A_terseLabel_en-US" xlink:label="lab_unh_FourPointSevenPercentageSeniorUnsecuredNotesDueFebruaryTwoThousandTwentyOneMember_445D14A5F69520B105FB8A89F29F4B9A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 4.700% Notes Due February 2021 [Member] </link:label>
<link:label id="lab_unh_FourPointSevenPercentageSeniorUnsecuredNotesDueFebruaryTwoThousandTwentyOneMember_445D14A5F69520B105FB8A89F29F4B9A_label_en-US" xlink:label="lab_unh_FourPointSevenPercentageSeniorUnsecuredNotesDueFebruaryTwoThousandTwentyOneMember_445D14A5F69520B105FB8A89F29F4B9A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Four Point Seven Percentage Senior Unsecured Notes Due February Two Thousand Twenty One [Member] </link:label>
<link:label id="lab_unh_FourPointSevenPercentageSeniorUnsecuredNotesDueFebruaryTwoThousandTwentyOneMember_445D14A5F69520B105FB8A89F29F4B9A_documentation_en-US" xlink:label="lab_unh_FourPointSevenPercentageSeniorUnsecuredNotesDueFebruaryTwoThousandTwentyOneMember_445D14A5F69520B105FB8A89F29F4B9A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Four Point Seven Percentage of Senior Unsecured Notes Due February Two Thousand and Twenty One [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_FourPointSevenPercentageSeniorUnsecuredNotesDueFebruaryTwoThousandTwentyOneMember" xlink:label="loc_unh_FourPointSevenPercentageSeniorUnsecuredNotesDueFebruaryTwoThousandTwentyOneMember_445D14A5F69520B105FB8A89F29F4B9A" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_FourPointSevenPercentageSeniorUnsecuredNotesDueFebruaryTwoThousandTwentyOneMember_445D14A5F69520B105FB8A89F29F4B9A" xlink:to="lab_unh_FourPointSevenPercentageSeniorUnsecuredNotesDueFebruaryTwoThousandTwentyOneMember_445D14A5F69520B105FB8A89F29F4B9A" xlink:type="arc"/>
<link:label id="lab_unh_A2.125notesdueMarch2021Member_D464A4EE0421DF0AA5518A89F29F396C_terseLabel_en-US" xlink:label="lab_unh_A2.125notesdueMarch2021Member_D464A4EE0421DF0AA5518A89F29F396C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2.125% notes due March 2021 [Member] </link:label>
<link:label id="lab_unh_A2.125notesdueMarch2021Member_D464A4EE0421DF0AA5518A89F29F396C_label_en-US" xlink:label="lab_unh_A2.125notesdueMarch2021Member_D464A4EE0421DF0AA5518A89F29F396C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 2.125% notes due March 2021 [Member] </link:label>
<link:label id="lab_unh_A2.125notesdueMarch2021Member_D464A4EE0421DF0AA5518A89F29F396C_documentation_en-US" xlink:label="lab_unh_A2.125notesdueMarch2021Member_D464A4EE0421DF0AA5518A89F29F396C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 2.125% notes due March 2021 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A2.125notesdueMarch2021Member" xlink:label="loc_unh_A2.125notesdueMarch2021Member_D464A4EE0421DF0AA5518A89F29F396C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A2.125notesdueMarch2021Member_D464A4EE0421DF0AA5518A89F29F396C" xlink:to="lab_unh_A2.125notesdueMarch2021Member_D464A4EE0421DF0AA5518A89F29F396C" xlink:type="arc"/>
<link:label id="lab_unh_ThreePointThreeSevenFivePercentSeniorUnsecuredNotesDueNovember2021Member_BB1F9635367A50C061F28A89F29FBD2D_terseLabel_en-US" xlink:label="lab_unh_ThreePointThreeSevenFivePercentSeniorUnsecuredNotesDueNovember2021Member_BB1F9635367A50C061F28A89F29FBD2D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 3.375% Notes Due November 2021 [Member] </link:label>
<link:label id="lab_unh_ThreePointThreeSevenFivePercentSeniorUnsecuredNotesDueNovember2021Member_BB1F9635367A50C061F28A89F29FBD2D_label_en-US" xlink:label="lab_unh_ThreePointThreeSevenFivePercentSeniorUnsecuredNotesDueNovember2021Member_BB1F9635367A50C061F28A89F29FBD2D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Three point three seven five percent Senior Unsecured Notes due November 2021 [Member] </link:label>
<link:label id="lab_unh_ThreePointThreeSevenFivePercentSeniorUnsecuredNotesDueNovember2021Member_BB1F9635367A50C061F28A89F29FBD2D_documentation_en-US" xlink:label="lab_unh_ThreePointThreeSevenFivePercentSeniorUnsecuredNotesDueNovember2021Member_BB1F9635367A50C061F28A89F29FBD2D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Three point three seven five percent Senior Unsecured Notes due November 2021 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_ThreePointThreeSevenFivePercentSeniorUnsecuredNotesDueNovember2021Member" xlink:label="loc_unh_ThreePointThreeSevenFivePercentSeniorUnsecuredNotesDueNovember2021Member_BB1F9635367A50C061F28A89F29FBD2D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_ThreePointThreeSevenFivePercentSeniorUnsecuredNotesDueNovember2021Member_BB1F9635367A50C061F28A89F29FBD2D" xlink:to="lab_unh_ThreePointThreeSevenFivePercentSeniorUnsecuredNotesDueNovember2021Member_BB1F9635367A50C061F28A89F29FBD2D" xlink:type="arc"/>
<link:label id="lab_unh_A2.875SeniorUnsecuredNotesDueDecember2021Member_98496476DA59914185B28A89F29FCD96_terseLabel_en-US" xlink:label="lab_unh_A2.875SeniorUnsecuredNotesDueDecember2021Member_98496476DA59914185B28A89F29FCD96" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2.875% Notes Due December 2021 [Member] </link:label>
<link:label id="lab_unh_A2.875SeniorUnsecuredNotesDueDecember2021Member_98496476DA59914185B28A89F29FCD96_label_en-US" xlink:label="lab_unh_A2.875SeniorUnsecuredNotesDueDecember2021Member_98496476DA59914185B28A89F29FCD96" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 2.875% Senior Unsecured Notes Due December 2021 [Member] </link:label>
<link:label id="lab_unh_A2.875SeniorUnsecuredNotesDueDecember2021Member_98496476DA59914185B28A89F29FCD96_documentation_en-US" xlink:label="lab_unh_A2.875SeniorUnsecuredNotesDueDecember2021Member_98496476DA59914185B28A89F29FCD96" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 2.875% Senior Unsecured Notes Due December 2021 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A2.875SeniorUnsecuredNotesDueDecember2021Member" xlink:label="loc_unh_A2.875SeniorUnsecuredNotesDueDecember2021Member_98496476DA59914185B28A89F29FCD96" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A2.875SeniorUnsecuredNotesDueDecember2021Member_98496476DA59914185B28A89F29FCD96" xlink:to="lab_unh_A2.875SeniorUnsecuredNotesDueDecember2021Member_98496476DA59914185B28A89F29FCD96" xlink:type="arc"/>
<link:label id="lab_unh_TwoPointEightSevenFiveSeniorUnsecuredNotesDueMarch2022Member_FE3B3E3EE50A614ADF5F8A89F2A0B8AC_terseLabel_en-US" xlink:label="lab_unh_TwoPointEightSevenFiveSeniorUnsecuredNotesDueMarch2022Member_FE3B3E3EE50A614ADF5F8A89F2A0B8AC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2.875% Notes Due March 2022 [Member] </link:label>
<link:label id="lab_unh_TwoPointEightSevenFiveSeniorUnsecuredNotesDueMarch2022Member_FE3B3E3EE50A614ADF5F8A89F2A0B8AC_label_en-US" xlink:label="lab_unh_TwoPointEightSevenFiveSeniorUnsecuredNotesDueMarch2022Member_FE3B3E3EE50A614ADF5F8A89F2A0B8AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Two point eight seven five Senior Unsecured Notes due March 2022 [Member] </link:label>
<link:label id="lab_unh_TwoPointEightSevenFiveSeniorUnsecuredNotesDueMarch2022Member_FE3B3E3EE50A614ADF5F8A89F2A0B8AC_documentation_en-US" xlink:label="lab_unh_TwoPointEightSevenFiveSeniorUnsecuredNotesDueMarch2022Member_FE3B3E3EE50A614ADF5F8A89F2A0B8AC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Two point eight seven five Senior Unsecured Notes due March 2022 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_TwoPointEightSevenFiveSeniorUnsecuredNotesDueMarch2022Member" xlink:label="loc_unh_TwoPointEightSevenFiveSeniorUnsecuredNotesDueMarch2022Member_FE3B3E3EE50A614ADF5F8A89F2A0B8AC" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_TwoPointEightSevenFiveSeniorUnsecuredNotesDueMarch2022Member_FE3B3E3EE50A614ADF5F8A89F2A0B8AC" xlink:to="lab_unh_TwoPointEightSevenFiveSeniorUnsecuredNotesDueMarch2022Member_FE3B3E3EE50A614ADF5F8A89F2A0B8AC" xlink:type="arc"/>
<link:label id="lab_unh_A3.350SeniorUnsecuredNotesdueJuly2022Member_31D22224CBF01653F5878A89F2A06102_terseLabel_en-US" xlink:label="lab_unh_A3.350SeniorUnsecuredNotesdueJuly2022Member_31D22224CBF01653F5878A89F2A06102" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 3.350% Notes Due July 2022 [Member] </link:label>
<link:label id="lab_unh_A3.350SeniorUnsecuredNotesdueJuly2022Member_31D22224CBF01653F5878A89F2A06102_label_en-US" xlink:label="lab_unh_A3.350SeniorUnsecuredNotesdueJuly2022Member_31D22224CBF01653F5878A89F2A06102" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 3.350% Senior Unsecured Notes due July 2022 [Member] </link:label>
<link:label id="lab_unh_A3.350SeniorUnsecuredNotesdueJuly2022Member_31D22224CBF01653F5878A89F2A06102_documentation_en-US" xlink:label="lab_unh_A3.350SeniorUnsecuredNotesdueJuly2022Member_31D22224CBF01653F5878A89F2A06102" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 3.350% Senior Unsecured Notes due July 2022 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A3.350SeniorUnsecuredNotesdueJuly2022Member" xlink:label="loc_unh_A3.350SeniorUnsecuredNotesdueJuly2022Member_31D22224CBF01653F5878A89F2A06102" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A3.350SeniorUnsecuredNotesdueJuly2022Member_31D22224CBF01653F5878A89F2A06102" xlink:to="lab_unh_A3.350SeniorUnsecuredNotesdueJuly2022Member_31D22224CBF01653F5878A89F2A06102" xlink:type="arc"/>
<link:label id="lab_unh_ZeroCouponSeniorUnsecuredNotesDueNovemberTwoThousandTwentyTwoMember_155AE35A98C2313C48C98A89F2A01754_terseLabel_en-US" xlink:label="lab_unh_ZeroCouponSeniorUnsecuredNotesDueNovemberTwoThousandTwentyTwoMember_155AE35A98C2313C48C98A89F2A01754" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 0.000% Notes Due November 2022 [Member] </link:label>
<link:label id="lab_unh_ZeroCouponSeniorUnsecuredNotesDueNovemberTwoThousandTwentyTwoMember_155AE35A98C2313C48C98A89F2A01754_label_en-US" xlink:label="lab_unh_ZeroCouponSeniorUnsecuredNotesDueNovemberTwoThousandTwentyTwoMember_155AE35A98C2313C48C98A89F2A01754" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Zero Coupon Senior Unsecured Notes Due November Two Thousand Twenty Two [Member] </link:label>
<link:label id="lab_unh_ZeroCouponSeniorUnsecuredNotesDueNovemberTwoThousandTwentyTwoMember_155AE35A98C2313C48C98A89F2A01754_documentation_en-US" xlink:label="lab_unh_ZeroCouponSeniorUnsecuredNotesDueNovemberTwoThousandTwentyTwoMember_155AE35A98C2313C48C98A89F2A01754" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Senior Unsecured Notes Zero Coupon Due November 2022 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_ZeroCouponSeniorUnsecuredNotesDueNovemberTwoThousandTwentyTwoMember" xlink:label="loc_unh_ZeroCouponSeniorUnsecuredNotesDueNovemberTwoThousandTwentyTwoMember_155AE35A98C2313C48C98A89F2A01754" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_ZeroCouponSeniorUnsecuredNotesDueNovemberTwoThousandTwentyTwoMember_155AE35A98C2313C48C98A89F2A01754" xlink:to="lab_unh_ZeroCouponSeniorUnsecuredNotesDueNovemberTwoThousandTwentyTwoMember_155AE35A98C2313C48C98A89F2A01754" xlink:type="arc"/>
<link:label id="lab_unh_A2750SeniorUnsecuredNotesDueFebruary2023Member_4FDEBADBB37C04E11D3E8A89F2A0729E_terseLabel_en-US" xlink:label="lab_unh_A2750SeniorUnsecuredNotesDueFebruary2023Member_4FDEBADBB37C04E11D3E8A89F2A0729E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2.750% Notes Due February 2023 [Member] </link:label>
<link:label id="lab_unh_A2750SeniorUnsecuredNotesDueFebruary2023Member_4FDEBADBB37C04E11D3E8A89F2A0729E_label_en-US" xlink:label="lab_unh_A2750SeniorUnsecuredNotesDueFebruary2023Member_4FDEBADBB37C04E11D3E8A89F2A0729E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 2.750% Senior Unsecured Notes due February 2023 [Member] </link:label>
<link:label id="lab_unh_A2750SeniorUnsecuredNotesDueFebruary2023Member_4FDEBADBB37C04E11D3E8A89F2A0729E_documentation_en-US" xlink:label="lab_unh_A2750SeniorUnsecuredNotesDueFebruary2023Member_4FDEBADBB37C04E11D3E8A89F2A0729E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 2.750% Senior Unsecured Notes due February 2023 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A2750SeniorUnsecuredNotesDueFebruary2023Member" xlink:label="loc_unh_A2750SeniorUnsecuredNotesDueFebruary2023Member_4FDEBADBB37C04E11D3E8A89F2A0729E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A2750SeniorUnsecuredNotesDueFebruary2023Member_4FDEBADBB37C04E11D3E8A89F2A0729E" xlink:to="lab_unh_A2750SeniorUnsecuredNotesDueFebruary2023Member_4FDEBADBB37C04E11D3E8A89F2A0729E" xlink:type="arc"/>
<link:label id="lab_unh_A2875SeniorUnsecuredNotesDueMarch2023Member_4CA7A5F6EF9AAB9C32E08A89F2A0D91C_terseLabel_en-US" xlink:label="lab_unh_A2875SeniorUnsecuredNotesDueMarch2023Member_4CA7A5F6EF9AAB9C32E08A89F2A0D91C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2.875% Notes Due March 2023 [Member] </link:label>
<link:label id="lab_unh_A2875SeniorUnsecuredNotesDueMarch2023Member_4CA7A5F6EF9AAB9C32E08A89F2A0D91C_label_en-US" xlink:label="lab_unh_A2875SeniorUnsecuredNotesDueMarch2023Member_4CA7A5F6EF9AAB9C32E08A89F2A0D91C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 2.875% Senior Unsecured Notes due March 2023 [Member] </link:label>
<link:label id="lab_unh_A2875SeniorUnsecuredNotesDueMarch2023Member_4CA7A5F6EF9AAB9C32E08A89F2A0D91C_documentation_en-US" xlink:label="lab_unh_A2875SeniorUnsecuredNotesDueMarch2023Member_4CA7A5F6EF9AAB9C32E08A89F2A0D91C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 2.875% Senior Unsecured Notes due March 2023 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A2875SeniorUnsecuredNotesDueMarch2023Member" xlink:label="loc_unh_A2875SeniorUnsecuredNotesDueMarch2023Member_4CA7A5F6EF9AAB9C32E08A89F2A0D91C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A2875SeniorUnsecuredNotesDueMarch2023Member_4CA7A5F6EF9AAB9C32E08A89F2A0D91C" xlink:to="lab_unh_A2875SeniorUnsecuredNotesDueMarch2023Member_4CA7A5F6EF9AAB9C32E08A89F2A0D91C" xlink:type="arc"/>
<link:label id="lab_unh_A3.750notesdueJuly2025Member_A2AFC0DD3E22F658EB178A89F2A0D821_terseLabel_en-US" xlink:label="lab_unh_A3.750notesdueJuly2025Member_A2AFC0DD3E22F658EB178A89F2A0D821" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 3.750% Notes Due July 2025 [Member] </link:label>
<link:label id="lab_unh_A3.750notesdueJuly2025Member_A2AFC0DD3E22F658EB178A89F2A0D821_label_en-US" xlink:label="lab_unh_A3.750notesdueJuly2025Member_A2AFC0DD3E22F658EB178A89F2A0D821" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 3.750% notes due July 2025 [Member] </link:label>
<link:label id="lab_unh_A3.750notesdueJuly2025Member_A2AFC0DD3E22F658EB178A89F2A0D821_documentation_en-US" xlink:label="lab_unh_A3.750notesdueJuly2025Member_A2AFC0DD3E22F658EB178A89F2A0D821" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 3.750% notes due July 2025 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A3.750notesdueJuly2025Member" xlink:label="loc_unh_A3.750notesdueJuly2025Member_A2AFC0DD3E22F658EB178A89F2A0D821" xlink:type="locator"/>
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<link:label id="lab_unh_A3.100notesdueMarch2026Member_C1DFED38A7AE8EB44CCF8A89F2A01429_terseLabel_en-US" xlink:label="lab_unh_A3.100notesdueMarch2026Member_C1DFED38A7AE8EB44CCF8A89F2A01429" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 3.100% notes due March 2026 [Member] </link:label>
<link:label id="lab_unh_A3.100notesdueMarch2026Member_C1DFED38A7AE8EB44CCF8A89F2A01429_label_en-US" xlink:label="lab_unh_A3.100notesdueMarch2026Member_C1DFED38A7AE8EB44CCF8A89F2A01429" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 3.100% notes due March 2026 [Member] </link:label>
<link:label id="lab_unh_A3.100notesdueMarch2026Member_C1DFED38A7AE8EB44CCF8A89F2A01429_documentation_en-US" xlink:label="lab_unh_A3.100notesdueMarch2026Member_C1DFED38A7AE8EB44CCF8A89F2A01429" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 3.100% notes due March 2026 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A3.100notesdueMarch2026Member" xlink:label="loc_unh_A3.100notesdueMarch2026Member_C1DFED38A7AE8EB44CCF8A89F2A01429" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A3.100notesdueMarch2026Member_C1DFED38A7AE8EB44CCF8A89F2A01429" xlink:to="lab_unh_A3.100notesdueMarch2026Member_C1DFED38A7AE8EB44CCF8A89F2A01429" xlink:type="arc"/>
<link:label id="lab_unh_A3.450notesdueJanuary2027Member_6D44EEDBF182BE928B388A89F2A03605_terseLabel_en-US" xlink:label="lab_unh_A3.450notesdueJanuary2027Member_6D44EEDBF182BE928B388A89F2A03605" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 3.450% notes due January 2027 [Member] </link:label>
<link:label id="lab_unh_A3.450notesdueJanuary2027Member_6D44EEDBF182BE928B388A89F2A03605_label_en-US" xlink:label="lab_unh_A3.450notesdueJanuary2027Member_6D44EEDBF182BE928B388A89F2A03605" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 3.450% notes due January 2027 [Member] </link:label>
<link:label id="lab_unh_A3.450notesdueJanuary2027Member_6D44EEDBF182BE928B388A89F2A03605_documentation_en-US" xlink:label="lab_unh_A3.450notesdueJanuary2027Member_6D44EEDBF182BE928B388A89F2A03605" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 3.450% notes due January 2027 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A3.450notesdueJanuary2027Member" xlink:label="loc_unh_A3.450notesdueJanuary2027Member_6D44EEDBF182BE928B388A89F2A03605" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A3.450notesdueJanuary2027Member_6D44EEDBF182BE928B388A89F2A03605" xlink:to="lab_unh_A3.450notesdueJanuary2027Member_6D44EEDBF182BE928B388A89F2A03605" xlink:type="arc"/>
<link:label id="lab_unh_A4.625notesdueJuly2035Member_C1324A7F06AB4CC2E2BF8A89F2A08EA7_terseLabel_en-US" xlink:label="lab_unh_A4.625notesdueJuly2035Member_C1324A7F06AB4CC2E2BF8A89F2A08EA7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 4.625% Notes Due July 2035 [Member] </link:label>
<link:label id="lab_unh_A4.625notesdueJuly2035Member_C1324A7F06AB4CC2E2BF8A89F2A08EA7_label_en-US" xlink:label="lab_unh_A4.625notesdueJuly2035Member_C1324A7F06AB4CC2E2BF8A89F2A08EA7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 4.625% notes due July 2035 [Member] </link:label>
<link:label id="lab_unh_A4.625notesdueJuly2035Member_C1324A7F06AB4CC2E2BF8A89F2A08EA7_documentation_en-US" xlink:label="lab_unh_A4.625notesdueJuly2035Member_C1324A7F06AB4CC2E2BF8A89F2A08EA7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 4.625% notes due July 2035 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A4.625notesdueJuly2035Member" xlink:label="loc_unh_A4.625notesdueJuly2035Member_C1324A7F06AB4CC2E2BF8A89F2A08EA7" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A4.625notesdueJuly2035Member_C1324A7F06AB4CC2E2BF8A89F2A08EA7" xlink:to="lab_unh_A4.625notesdueJuly2035Member_C1324A7F06AB4CC2E2BF8A89F2A08EA7" xlink:type="arc"/>
<link:label id="lab_unh_FivePointEightPercentSeniorUnsecuredNotesDueMarchTwoThousandThirtySixMember_A74FC69C54F09D41394B8A89F2A0D60E_terseLabel_en-US" xlink:label="lab_unh_FivePointEightPercentSeniorUnsecuredNotesDueMarchTwoThousandThirtySixMember_A74FC69C54F09D41394B8A89F2A0D60E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 5.800% Notes Due March 2036 [Member] </link:label>
<link:label id="lab_unh_FivePointEightPercentSeniorUnsecuredNotesDueMarchTwoThousandThirtySixMember_A74FC69C54F09D41394B8A89F2A0D60E_label_en-US" xlink:label="lab_unh_FivePointEightPercentSeniorUnsecuredNotesDueMarchTwoThousandThirtySixMember_A74FC69C54F09D41394B8A89F2A0D60E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Five Point Eight Percent Senior Unsecured Notes Due March Two Thousand Thirty Six [Member] </link:label>
<link:label id="lab_unh_FivePointEightPercentSeniorUnsecuredNotesDueMarchTwoThousandThirtySixMember_A74FC69C54F09D41394B8A89F2A0D60E_documentation_en-US" xlink:label="lab_unh_FivePointEightPercentSeniorUnsecuredNotesDueMarchTwoThousandThirtySixMember_A74FC69C54F09D41394B8A89F2A0D60E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Senior Unsecured Notes 5.8 Percent Due March 2036 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_FivePointEightPercentSeniorUnsecuredNotesDueMarchTwoThousandThirtySixMember" xlink:label="loc_unh_FivePointEightPercentSeniorUnsecuredNotesDueMarchTwoThousandThirtySixMember_A74FC69C54F09D41394B8A89F2A0D60E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_FivePointEightPercentSeniorUnsecuredNotesDueMarchTwoThousandThirtySixMember_A74FC69C54F09D41394B8A89F2A0D60E" xlink:to="lab_unh_FivePointEightPercentSeniorUnsecuredNotesDueMarchTwoThousandThirtySixMember_A74FC69C54F09D41394B8A89F2A0D60E" xlink:type="arc"/>
<link:label id="lab_unh_SixPointFivePercentSeniorUnsecuredNotesDueJuneTwoThousandThirtySevenMember_A0DA523331D29A11840A8A89F2A01AAD_terseLabel_en-US" xlink:label="lab_unh_SixPointFivePercentSeniorUnsecuredNotesDueJuneTwoThousandThirtySevenMember_A0DA523331D29A11840A8A89F2A01AAD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 6.500% Notes Due June 2037 [Member] </link:label>
<link:label id="lab_unh_SixPointFivePercentSeniorUnsecuredNotesDueJuneTwoThousandThirtySevenMember_A0DA523331D29A11840A8A89F2A01AAD_label_en-US" xlink:label="lab_unh_SixPointFivePercentSeniorUnsecuredNotesDueJuneTwoThousandThirtySevenMember_A0DA523331D29A11840A8A89F2A01AAD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Six Point Five Percent Senior Unsecured Notes Due June Two Thousand Thirty Seven [Member] </link:label>
<link:label id="lab_unh_SixPointFivePercentSeniorUnsecuredNotesDueJuneTwoThousandThirtySevenMember_A0DA523331D29A11840A8A89F2A01AAD_documentation_en-US" xlink:label="lab_unh_SixPointFivePercentSeniorUnsecuredNotesDueJuneTwoThousandThirtySevenMember_A0DA523331D29A11840A8A89F2A01AAD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Senior Unsecured Notes 6.5 Percent Due June 2037 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_SixPointFivePercentSeniorUnsecuredNotesDueJuneTwoThousandThirtySevenMember" xlink:label="loc_unh_SixPointFivePercentSeniorUnsecuredNotesDueJuneTwoThousandThirtySevenMember_A0DA523331D29A11840A8A89F2A01AAD" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_SixPointFivePercentSeniorUnsecuredNotesDueJuneTwoThousandThirtySevenMember_A0DA523331D29A11840A8A89F2A01AAD" xlink:to="lab_unh_SixPointFivePercentSeniorUnsecuredNotesDueJuneTwoThousandThirtySevenMember_A0DA523331D29A11840A8A89F2A01AAD" xlink:type="arc"/>
<link:label id="lab_unh_SixPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2037Member_81A003834CDE01CC868E8A89F2A0A8BA_terseLabel_en-US" xlink:label="lab_unh_SixPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2037Member_81A003834CDE01CC868E8A89F2A0A8BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 6.625% Notes Due November 2037 [Member] </link:label>
<link:label id="lab_unh_SixPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2037Member_81A003834CDE01CC868E8A89F2A0A8BA_label_en-US" xlink:label="lab_unh_SixPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2037Member_81A003834CDE01CC868E8A89F2A0A8BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> six point six two five percent Senior Unsecured Notes due November 2037 [Member] </link:label>
<link:label id="lab_unh_SixPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2037Member_81A003834CDE01CC868E8A89F2A0A8BA_documentation_en-US" xlink:label="lab_unh_SixPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2037Member_81A003834CDE01CC868E8A89F2A0A8BA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> six point six two five percent Senior Unsecured Notes due November 2037 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_SixPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2037Member" xlink:label="loc_unh_SixPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2037Member_81A003834CDE01CC868E8A89F2A0A8BA" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_SixPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2037Member_81A003834CDE01CC868E8A89F2A0A8BA" xlink:to="lab_unh_SixPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2037Member_81A003834CDE01CC868E8A89F2A0A8BA" xlink:type="arc"/>
<link:label id="lab_unh_SixPointEightSevenFivePercentSeniorUnsecuredNotesDueFebruray2038Member_68ECBAEA7E34C54EAA4C8A89F2A0F1F0_terseLabel_en-US" xlink:label="lab_unh_SixPointEightSevenFivePercentSeniorUnsecuredNotesDueFebruray2038Member_68ECBAEA7E34C54EAA4C8A89F2A0F1F0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 6.875% Notes Due Februray 2038 [Member] </link:label>
<link:label id="lab_unh_SixPointEightSevenFivePercentSeniorUnsecuredNotesDueFebruray2038Member_68ECBAEA7E34C54EAA4C8A89F2A0F1F0_label_en-US" xlink:label="lab_unh_SixPointEightSevenFivePercentSeniorUnsecuredNotesDueFebruray2038Member_68ECBAEA7E34C54EAA4C8A89F2A0F1F0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Six point eight seven five percent Senior Unsecured Notes due Februray 2038 [Member] </link:label>
<link:label id="lab_unh_SixPointEightSevenFivePercentSeniorUnsecuredNotesDueFebruray2038Member_68ECBAEA7E34C54EAA4C8A89F2A0F1F0_documentation_en-US" xlink:label="lab_unh_SixPointEightSevenFivePercentSeniorUnsecuredNotesDueFebruray2038Member_68ECBAEA7E34C54EAA4C8A89F2A0F1F0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Six point eight seven five percent Senior Unsecured Notes due Februray 2038 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_SixPointEightSevenFivePercentSeniorUnsecuredNotesDueFebruray2038Member" xlink:label="loc_unh_SixPointEightSevenFivePercentSeniorUnsecuredNotesDueFebruray2038Member_68ECBAEA7E34C54EAA4C8A89F2A0F1F0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_SixPointEightSevenFivePercentSeniorUnsecuredNotesDueFebruray2038Member_68ECBAEA7E34C54EAA4C8A89F2A0F1F0" xlink:to="lab_unh_SixPointEightSevenFivePercentSeniorUnsecuredNotesDueFebruray2038Member_68ECBAEA7E34C54EAA4C8A89F2A0F1F0" xlink:type="arc"/>
<link:label id="lab_unh_FivePointSevenPercentSeniorUnsecuredNotesDueOctoberTwoThousandFortyMember_BCDBB5693BB6C2FF91298A89F2A06B2D_terseLabel_en-US" xlink:label="lab_unh_FivePointSevenPercentSeniorUnsecuredNotesDueOctoberTwoThousandFortyMember_BCDBB5693BB6C2FF91298A89F2A06B2D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 5.700% Notes Due October 2040 [Member] </link:label>
<link:label id="lab_unh_FivePointSevenPercentSeniorUnsecuredNotesDueOctoberTwoThousandFortyMember_BCDBB5693BB6C2FF91298A89F2A06B2D_label_en-US" xlink:label="lab_unh_FivePointSevenPercentSeniorUnsecuredNotesDueOctoberTwoThousandFortyMember_BCDBB5693BB6C2FF91298A89F2A06B2D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Five Point Seven Percent Senior Unsecured Notes Due October Two Thousand Forty [Member] </link:label>
<link:label id="lab_unh_FivePointSevenPercentSeniorUnsecuredNotesDueOctoberTwoThousandFortyMember_BCDBB5693BB6C2FF91298A89F2A06B2D_documentation_en-US" xlink:label="lab_unh_FivePointSevenPercentSeniorUnsecuredNotesDueOctoberTwoThousandFortyMember_BCDBB5693BB6C2FF91298A89F2A06B2D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Five Point Seven Percentage of Senior Unsecured Notes Due October Two Thousand and Forty [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_FivePointSevenPercentSeniorUnsecuredNotesDueOctoberTwoThousandFortyMember" xlink:label="loc_unh_FivePointSevenPercentSeniorUnsecuredNotesDueOctoberTwoThousandFortyMember_BCDBB5693BB6C2FF91298A89F2A06B2D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_FivePointSevenPercentSeniorUnsecuredNotesDueOctoberTwoThousandFortyMember_BCDBB5693BB6C2FF91298A89F2A06B2D" xlink:to="lab_unh_FivePointSevenPercentSeniorUnsecuredNotesDueOctoberTwoThousandFortyMember_BCDBB5693BB6C2FF91298A89F2A06B2D" xlink:type="arc"/>
<link:label id="lab_unh_FivePointNineFiveSeniorUnsecuredNotesDueFebrurary2041Member_766E3BBD1F81EE1869528A89F2A06F48_terseLabel_en-US" xlink:label="lab_unh_FivePointNineFiveSeniorUnsecuredNotesDueFebrurary2041Member_766E3BBD1F81EE1869528A89F2A06F48" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 5.950% Notes Due Februrary 2041 [Member] </link:label>
<link:label id="lab_unh_FivePointNineFiveSeniorUnsecuredNotesDueFebrurary2041Member_766E3BBD1F81EE1869528A89F2A06F48_label_en-US" xlink:label="lab_unh_FivePointNineFiveSeniorUnsecuredNotesDueFebrurary2041Member_766E3BBD1F81EE1869528A89F2A06F48" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Five point nine five Senior Unsecured Notes due Februrary 2041 [Member] </link:label>
<link:label id="lab_unh_FivePointNineFiveSeniorUnsecuredNotesDueFebrurary2041Member_766E3BBD1F81EE1869528A89F2A06F48_documentation_en-US" xlink:label="lab_unh_FivePointNineFiveSeniorUnsecuredNotesDueFebrurary2041Member_766E3BBD1F81EE1869528A89F2A06F48" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Five point nine five Senior Unsecured Notes due Februrary 2041 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_FivePointNineFiveSeniorUnsecuredNotesDueFebrurary2041Member" xlink:label="loc_unh_FivePointNineFiveSeniorUnsecuredNotesDueFebrurary2041Member_766E3BBD1F81EE1869528A89F2A06F48" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_FivePointNineFiveSeniorUnsecuredNotesDueFebrurary2041Member_766E3BBD1F81EE1869528A89F2A06F48" xlink:to="lab_unh_FivePointNineFiveSeniorUnsecuredNotesDueFebrurary2041Member_766E3BBD1F81EE1869528A89F2A06F48" xlink:type="arc"/>
<link:label id="lab_unh_FourPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2041Member_32B13E52994EC806D1F18A89F2A1FC5C_terseLabel_en-US" xlink:label="lab_unh_FourPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2041Member_32B13E52994EC806D1F18A89F2A1FC5C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 4.625% Notes Due November 2041 [Member] </link:label>
<link:label id="lab_unh_FourPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2041Member_32B13E52994EC806D1F18A89F2A1FC5C_label_en-US" xlink:label="lab_unh_FourPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2041Member_32B13E52994EC806D1F18A89F2A1FC5C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Four point six two five percent senior unsecured notes due November 2041 [Member] </link:label>
<link:label id="lab_unh_FourPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2041Member_32B13E52994EC806D1F18A89F2A1FC5C_documentation_en-US" xlink:label="lab_unh_FourPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2041Member_32B13E52994EC806D1F18A89F2A1FC5C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Four point six two five percent senior unsecured notes due November 2041 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_FourPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2041Member" xlink:label="loc_unh_FourPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2041Member_32B13E52994EC806D1F18A89F2A1FC5C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_FourPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2041Member_32B13E52994EC806D1F18A89F2A1FC5C" xlink:to="lab_unh_FourPointSixTwoFivePercentSeniorUnsecuredNotesDueNovember2041Member_32B13E52994EC806D1F18A89F2A1FC5C" xlink:type="arc"/>
<link:label id="lab_unh_FourPointThreeSevenFivePercentSeniorUnsecuredNotesDueMarch2042Member_A59E8E27CBCDB745AB7E8A89F2A1EE82_terseLabel_en-US" xlink:label="lab_unh_FourPointThreeSevenFivePercentSeniorUnsecuredNotesDueMarch2042Member_A59E8E27CBCDB745AB7E8A89F2A1EE82" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 4.375% Notes Due March 2042 [Member] </link:label>
<link:label id="lab_unh_FourPointThreeSevenFivePercentSeniorUnsecuredNotesDueMarch2042Member_A59E8E27CBCDB745AB7E8A89F2A1EE82_label_en-US" xlink:label="lab_unh_FourPointThreeSevenFivePercentSeniorUnsecuredNotesDueMarch2042Member_A59E8E27CBCDB745AB7E8A89F2A1EE82" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Four point three seven five percent Senior Unsecured Notes due March 2042 [Member] </link:label>
<link:label id="lab_unh_FourPointThreeSevenFivePercentSeniorUnsecuredNotesDueMarch2042Member_A59E8E27CBCDB745AB7E8A89F2A1EE82_documentation_en-US" xlink:label="lab_unh_FourPointThreeSevenFivePercentSeniorUnsecuredNotesDueMarch2042Member_A59E8E27CBCDB745AB7E8A89F2A1EE82" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Four point three seven five percent Senior Unsecured Notes due March 2042 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_FourPointThreeSevenFivePercentSeniorUnsecuredNotesDueMarch2042Member" xlink:label="loc_unh_FourPointThreeSevenFivePercentSeniorUnsecuredNotesDueMarch2042Member_A59E8E27CBCDB745AB7E8A89F2A1EE82" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_FourPointThreeSevenFivePercentSeniorUnsecuredNotesDueMarch2042Member_A59E8E27CBCDB745AB7E8A89F2A1EE82" xlink:to="lab_unh_FourPointThreeSevenFivePercentSeniorUnsecuredNotesDueMarch2042Member_A59E8E27CBCDB745AB7E8A89F2A1EE82" xlink:type="arc"/>
<link:label id="lab_unh_A3950SeniorUnsecuredNotesDueOctober2042Member_209FD8FFC3798806E19B8A89F2A18470_terseLabel_en-US" xlink:label="lab_unh_A3950SeniorUnsecuredNotesDueOctober2042Member_209FD8FFC3798806E19B8A89F2A18470" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 3.950% Notes Due October 2042 [Member] </link:label>
<link:label id="lab_unh_A3950SeniorUnsecuredNotesDueOctober2042Member_209FD8FFC3798806E19B8A89F2A18470_label_en-US" xlink:label="lab_unh_A3950SeniorUnsecuredNotesDueOctober2042Member_209FD8FFC3798806E19B8A89F2A18470" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 3.950% Senior Unsecured Notes due October 2042 [Member] </link:label>
<link:label id="lab_unh_A3950SeniorUnsecuredNotesDueOctober2042Member_209FD8FFC3798806E19B8A89F2A18470_documentation_en-US" xlink:label="lab_unh_A3950SeniorUnsecuredNotesDueOctober2042Member_209FD8FFC3798806E19B8A89F2A18470" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 3.950% Senior Unsecured Notes due October 2042 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A3950SeniorUnsecuredNotesDueOctober2042Member" xlink:label="loc_unh_A3950SeniorUnsecuredNotesDueOctober2042Member_209FD8FFC3798806E19B8A89F2A18470" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A3950SeniorUnsecuredNotesDueOctober2042Member_209FD8FFC3798806E19B8A89F2A18470" xlink:to="lab_unh_A3950SeniorUnsecuredNotesDueOctober2042Member_209FD8FFC3798806E19B8A89F2A18470" xlink:type="arc"/>
<link:label id="lab_unh_A4250SeniorUnsecuredNotesDueMarch2043Member_2992961419155C46894B8A89F2A146E5_terseLabel_en-US" xlink:label="lab_unh_A4250SeniorUnsecuredNotesDueMarch2043Member_2992961419155C46894B8A89F2A146E5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 4.250% Notes Due March 2043 [Member] </link:label>
<link:label id="lab_unh_A4250SeniorUnsecuredNotesDueMarch2043Member_2992961419155C46894B8A89F2A146E5_label_en-US" xlink:label="lab_unh_A4250SeniorUnsecuredNotesDueMarch2043Member_2992961419155C46894B8A89F2A146E5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 4.250% Senior Unsecured Notes due March 2043 [Member] </link:label>
<link:label id="lab_unh_A4250SeniorUnsecuredNotesDueMarch2043Member_2992961419155C46894B8A89F2A146E5_documentation_en-US" xlink:label="lab_unh_A4250SeniorUnsecuredNotesDueMarch2043Member_2992961419155C46894B8A89F2A146E5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 4.250% Senior Unsecured Notes due March 2043 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A4250SeniorUnsecuredNotesDueMarch2043Member" xlink:label="loc_unh_A4250SeniorUnsecuredNotesDueMarch2043Member_2992961419155C46894B8A89F2A146E5" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A4250SeniorUnsecuredNotesDueMarch2043Member_2992961419155C46894B8A89F2A146E5" xlink:to="lab_unh_A4250SeniorUnsecuredNotesDueMarch2043Member_2992961419155C46894B8A89F2A146E5" xlink:type="arc"/>
<link:label id="lab_unh_A4.750notesdueJuly2045Member_8806FABCC95E49F173BA8A89F2A1D48E_terseLabel_en-US" xlink:label="lab_unh_A4.750notesdueJuly2045Member_8806FABCC95E49F173BA8A89F2A1D48E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 4.750% Notes Due July 2045 [Member] </link:label>
<link:label id="lab_unh_A4.750notesdueJuly2045Member_8806FABCC95E49F173BA8A89F2A1D48E_label_en-US" xlink:label="lab_unh_A4.750notesdueJuly2045Member_8806FABCC95E49F173BA8A89F2A1D48E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 4.750% notes due July 2045 [Member] </link:label>
<link:label id="lab_unh_A4.750notesdueJuly2045Member_8806FABCC95E49F173BA8A89F2A1D48E_documentation_en-US" xlink:label="lab_unh_A4.750notesdueJuly2045Member_8806FABCC95E49F173BA8A89F2A1D48E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 4.750% notes due July 2045 [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A4.750notesdueJuly2045Member" xlink:label="loc_unh_A4.750notesdueJuly2045Member_8806FABCC95E49F173BA8A89F2A1D48E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A4.750notesdueJuly2045Member_8806FABCC95E49F173BA8A89F2A1D48E" xlink:to="lab_unh_A4.750notesdueJuly2045Member_8806FABCC95E49F173BA8A89F2A1D48E" xlink:type="arc"/>
<link:label id="lab_unh_A4.200notesdueJanuary2047Member_6B04459E111821962B278A89F2A19D21_terseLabel_en-US" xlink:label="lab_unh_A4.200notesdueJanuary2047Member_6B04459E111821962B278A89F2A19D21" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 4.200% notes due January 2047 [Member] </link:label>
<link:label id="lab_unh_A4.200notesdueJanuary2047Member_6B04459E111821962B278A89F2A19D21_label_en-US" xlink:label="lab_unh_A4.200notesdueJanuary2047Member_6B04459E111821962B278A89F2A19D21" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> 4.200% notes due January 2047 [Member] </link:label>
<link:label id="lab_unh_A4.200notesdueJanuary2047Member_6B04459E111821962B278A89F2A19D21_documentation_en-US" xlink:label="lab_unh_A4.200notesdueJanuary2047Member_6B04459E111821962B278A89F2A19D21" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> 4.200% notes due January 2047 </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_A4.200notesdueJanuary2047Member" xlink:label="loc_unh_A4.200notesdueJanuary2047Member_6B04459E111821962B278A89F2A19D21" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_A4.200notesdueJanuary2047Member_6B04459E111821962B278A89F2A19D21" xlink:to="lab_unh_A4.200notesdueJanuary2047Member_6B04459E111821962B278A89F2A19D21" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_4863EBD150D252F3B8A98A89F2A13B89_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_4863EBD150D252F3B8A98A89F2A13B89" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Interest Rate, Stated Percentage </link:label>
<link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_4863EBD150D252F3B8A98A89F2A13B89_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_4863EBD150D252F3B8A98A89F2A13B89" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Interest Rate, Stated Percentage </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_4863EBD150D252F3B8A98A89F2A13B89" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_4863EBD150D252F3B8A98A89F2A13B89" xlink:to="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_4863EBD150D252F3B8A98A89F2A13B89" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentFaceAmount_56585272A859294B3F028A89F2A1F3FC_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_56585272A859294B3F028A89F2A1F3FC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Par Value </link:label>
<link:label id="lab_us-gaap_DebtInstrumentFaceAmount_56585272A859294B3F028A89F2A1F3FC_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_56585272A859294B3F028A89F2A1F3FC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Face Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_56585272A859294B3F028A89F2A1F3FC" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentFaceAmount_56585272A859294B3F028A89F2A1F3FC" xlink:to="lab_us-gaap_DebtInstrumentFaceAmount_56585272A859294B3F028A89F2A1F3FC" xlink:type="arc"/>
<link:label id="lab_us-gaap_UnsecuredLongTermDebt_B3729F76EF91DDBCDE8D8A89F2A1B30F_terseLabel_en-US" xlink:label="lab_us-gaap_UnsecuredLongTermDebt_B3729F76EF91DDBCDE8D8A89F2A1B30F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Unsecured Long-term Debt, Noncurrent </link:label>
<link:label id="lab_us-gaap_UnsecuredLongTermDebt_B3729F76EF91DDBCDE8D8A89F2A1B30F_label_en-US" xlink:label="lab_us-gaap_UnsecuredLongTermDebt_B3729F76EF91DDBCDE8D8A89F2A1B30F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Unsecured Long-term Debt, Noncurrent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnsecuredLongTermDebt" xlink:label="loc_us-gaap_UnsecuredLongTermDebt_B3729F76EF91DDBCDE8D8A89F2A1B30F" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnsecuredLongTermDebt_B3729F76EF91DDBCDE8D8A89F2A1B30F" xlink:to="lab_us-gaap_UnsecuredLongTermDebt_B3729F76EF91DDBCDE8D8A89F2A1B30F" xlink:type="arc"/>
<link:label id="lab_us-gaap_UnsecuredDebtCurrent_57D466288F4AC605F16C8A89F2A141C1_terseLabel_en-US" xlink:label="lab_us-gaap_UnsecuredDebtCurrent_57D466288F4AC605F16C8A89F2A141C1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Unsecured Debt, Current </link:label>
<link:label id="lab_us-gaap_UnsecuredDebtCurrent_57D466288F4AC605F16C8A89F2A141C1_label_en-US" xlink:label="lab_us-gaap_UnsecuredDebtCurrent_57D466288F4AC605F16C8A89F2A141C1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Unsecured Debt, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnsecuredDebtCurrent" xlink:label="loc_us-gaap_UnsecuredDebtCurrent_57D466288F4AC605F16C8A89F2A141C1" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnsecuredDebtCurrent_57D466288F4AC605F16C8A89F2A141C1" xlink:to="lab_us-gaap_UnsecuredDebtCurrent_57D466288F4AC605F16C8A89F2A141C1" xlink:type="arc"/>
<link:label id="lab_us-gaap_CommercialPaper_B6F859EFBC86AC4064F48A89F2A10803_terseLabel_en-US" xlink:label="lab_us-gaap_CommercialPaper_B6F859EFBC86AC4064F48A89F2A10803" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Commercial Paper </link:label>
<link:label id="lab_us-gaap_CommercialPaper_B6F859EFBC86AC4064F48A89F2A10803_label_en-US" xlink:label="lab_us-gaap_CommercialPaper_B6F859EFBC86AC4064F48A89F2A10803" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Commercial Paper </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommercialPaper" xlink:label="loc_us-gaap_CommercialPaper_B6F859EFBC86AC4064F48A89F2A10803" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommercialPaper_B6F859EFBC86AC4064F48A89F2A10803" xlink:to="lab_us-gaap_CommercialPaper_B6F859EFBC86AC4064F48A89F2A10803" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtLongtermAndShorttermCombinedAmount_5AF56E09632E2F9610D98A89F2A19470_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtLongtermAndShorttermCombinedAmount_5AF56E09632E2F9610D98A89F2A19470" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Carrying Value </link:label>
<link:label id="lab_us-gaap_DebtLongtermAndShorttermCombinedAmount_5AF56E09632E2F9610D98A89F2A19470_label_en-US" xlink:label="lab_us-gaap_DebtLongtermAndShorttermCombinedAmount_5AF56E09632E2F9610D98A89F2A19470" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt, Long-term and Short-term, Combined Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtLongtermAndShorttermCombinedAmount" xlink:label="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_5AF56E09632E2F9610D98A89F2A19470" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_5AF56E09632E2F9610D98A89F2A19470" xlink:to="lab_us-gaap_DebtLongtermAndShorttermCombinedAmount_5AF56E09632E2F9610D98A89F2A19470" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentFairValue_DE22E942FFBDDB309FE48A89F2A24D67_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFairValue_DE22E942FFBDDB309FE48A89F2A24D67" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Fair Value </link:label>
<link:label id="lab_us-gaap_DebtInstrumentFairValue_DE22E942FFBDDB309FE48A89F2A24D67_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentFairValue_DE22E942FFBDDB309FE48A89F2A24D67" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Fair Value Disclosure </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="loc_us-gaap_DebtInstrumentFairValue_DE22E942FFBDDB309FE48A89F2A24D67" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentFairValue_DE22E942FFBDDB309FE48A89F2A24D67" xlink:to="lab_us-gaap_DebtInstrumentFairValue_DE22E942FFBDDB309FE48A89F2A24D67" xlink:type="arc"/>
<link:label id="lab_us-gaap_LongTermDebtFairValue_D5E0043EA1239B8D57318A89F2A27DCD_verboseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtFairValue_D5E0043EA1239B8D57318A89F2A27DCD" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Fair Value </link:label>
<link:label id="lab_us-gaap_LongTermDebtFairValue_D5E0043EA1239B8D57318A89F2A27DCD_label_en-US" xlink:label="lab_us-gaap_LongTermDebtFairValue_D5E0043EA1239B8D57318A89F2A27DCD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Fair Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtFairValue" xlink:label="loc_us-gaap_LongTermDebtFairValue_D5E0043EA1239B8D57318A89F2A27DCD" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtFairValue_D5E0043EA1239B8D57318A89F2A27DCD" xlink:to="lab_us-gaap_LongTermDebtFairValue_D5E0043EA1239B8D57318A89F2A27DCD" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeasesOfLesseeDisclosureTextBlock_AA900463549EB2AC570C50C3F9E4254B_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesOfLesseeDisclosureTextBlock_AA900463549EB2AC570C50C3F9E4254B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Lessee, Operating Lease, Disclosure [Table Text Block] </link:label>
<link:label id="lab_us-gaap_OperatingLeasesOfLesseeDisclosureTextBlock_AA900463549EB2AC570C50C3F9E4254B_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesOfLesseeDisclosureTextBlock_AA900463549EB2AC570C50C3F9E4254B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessee, Operating Lease, Disclosure [Table Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesOfLesseeDisclosureTextBlock" xlink:label="loc_us-gaap_OperatingLeasesOfLesseeDisclosureTextBlock_AA900463549EB2AC570C50C3F9E4254B" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_F537513FCD06A62BF66550C3FA5EA671_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_F537513FCD06A62BF66550C3FA5EA671" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Total debt securities - available-for-sale, Amortized Cost </link:label>
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<link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_CD83131655889F193D1250C3FA5EA4AA_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_CD83131655889F193D1250C3FA5EA4AA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value </link:label>
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<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsLineItems_20859AFA74F84B8441E08A89F2CFA489_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsLineItems_20859AFA74F84B8441E08A89F2CFA489" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_20859AFA74F84B8441E08A89F2CFA489" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_20859AFA74F84B8441E08A89F2CFA489" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsLineItems_20859AFA74F84B8441E08A89F2CFA489" xlink:type="arc"/>
<link:label id="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_DBE04A4C04822B0390978A89F2CF6993_terseLabel_en-US" xlink:label="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_DBE04A4C04822B0390978A89F2CF6993" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Finite-lived Intangible Assets Acquired </link:label>
<link:label id="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_DBE04A4C04822B0390978A89F2CF6993_label_en-US" xlink:label="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_DBE04A4C04822B0390978A89F2CF6993" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-lived Intangible Assets Acquired </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_DBE04A4C04822B0390978A89F2CF6993" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_DBE04A4C04822B0390978A89F2CF6993" xlink:to="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_DBE04A4C04822B0390978A89F2CF6993" xlink:type="arc"/>
<link:label id="lab_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_7330AC3C859B87A9BD468A89F2CF52AF_terseLabel_en-US" xlink:label="lab_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_7330AC3C859B87A9BD468A89F2CF52AF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Acquired Finite-lived Intangible Assets, Weighted Average Useful Life </link:label>
<link:label id="lab_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_7330AC3C859B87A9BD468A89F2CF52AF_label_en-US" xlink:label="lab_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_7330AC3C859B87A9BD468A89F2CF52AF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Acquired Finite-lived Intangible Assets, Weighted Average Useful Life </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_7330AC3C859B87A9BD468A89F2CF52AF" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_7330AC3C859B87A9BD468A89F2CF52AF" xlink:to="lab_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_7330AC3C859B87A9BD468A89F2CF52AF" xlink:type="arc"/>
<link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_ADDF017FF36AE14AF1C550C3FA310495_verboseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_ADDF017FF36AE14AF1C550C3FA310495" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Segment Financial Information [Table Text Block] </link:label>
<link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_ADDF017FF36AE14AF1C550C3FA310495_label_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_ADDF017FF36AE14AF1C550C3FA310495" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Segment Reporting Information, by Segment [Table Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_ADDF017FF36AE14AF1C550C3FA310495" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_ADDF017FF36AE14AF1C550C3FA310495" xlink:to="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_ADDF017FF36AE14AF1C550C3FA310495" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShortTermInvestments_88C0D9725CF7AE4075F86CFC15591F1D_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermInvestments_88C0D9725CF7AE4075F86CFC15591F1D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Short-term investments </link:label>
<link:label id="lab_us-gaap_ShortTermInvestments_88C0D9725CF7AE4075F86CFC15591F1D_label_en-US" xlink:label="lab_us-gaap_ShortTermInvestments_88C0D9725CF7AE4075F86CFC15591F1D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Short-term Investments </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortTermInvestments" xlink:label="loc_us-gaap_ShortTermInvestments_88C0D9725CF7AE4075F86CFC15591F1D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortTermInvestments_88C0D9725CF7AE4075F86CFC15591F1D" xlink:to="lab_us-gaap_ShortTermInvestments_88C0D9725CF7AE4075F86CFC15591F1D" xlink:type="arc"/>
<link:label id="lab_us-gaap_AccountsReceivableNetCurrent_ACA2F40EA824470971716CFC1559F4FB_verboseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_ACA2F40EA824470971716CFC1559F4FB" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Accounts receivable, net of allowances of $641 and $514 </link:label>
<link:label id="lab_us-gaap_AccountsReceivableNetCurrent_ACA2F40EA824470971716CFC1559F4FB_label_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_ACA2F40EA824470971716CFC1559F4FB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accounts Receivable, Net, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_ACA2F40EA824470971716CFC1559F4FB" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsReceivableNetCurrent_ACA2F40EA824470971716CFC1559F4FB" xlink:to="lab_us-gaap_AccountsReceivableNetCurrent_ACA2F40EA824470971716CFC1559F4FB" xlink:type="arc"/>
<link:label id="lab_us-gaap_OtherReceivablesNetCurrent_5E80EE68BB74797E7A176CFC155924DE_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherReceivablesNetCurrent_5E80EE68BB74797E7A176CFC155924DE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Other current receivables, net of allowances of $440 and $409 </link:label>
<link:label id="lab_us-gaap_OtherReceivablesNetCurrent_5E80EE68BB74797E7A176CFC155924DE_label_en-US" xlink:label="lab_us-gaap_OtherReceivablesNetCurrent_5E80EE68BB74797E7A176CFC155924DE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Receivables, Net, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherReceivablesNetCurrent" xlink:label="loc_us-gaap_OtherReceivablesNetCurrent_5E80EE68BB74797E7A176CFC155924DE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherReceivablesNetCurrent_5E80EE68BB74797E7A176CFC155924DE" xlink:to="lab_us-gaap_OtherReceivablesNetCurrent_5E80EE68BB74797E7A176CFC155924DE" xlink:type="arc"/>
<link:label id="lab_unh_AarpAssetsUnderManagement_CF5D5681D92649DED9536CFC155950B2_terseLabel_en-US" xlink:label="lab_unh_AarpAssetsUnderManagement_CF5D5681D92649DED9536CFC155950B2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Assets under management </link:label>
<link:label id="lab_unh_AarpAssetsUnderManagement_CF5D5681D92649DED9536CFC155950B2_label_en-US" xlink:label="lab_unh_AarpAssetsUnderManagement_CF5D5681D92649DED9536CFC155950B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> AARP Assets Under Management </link:label>
<link:label id="lab_unh_AarpAssetsUnderManagement_CF5D5681D92649DED9536CFC155950B2_documentation_en-US" xlink:label="lab_unh_AarpAssetsUnderManagement_CF5D5681D92649DED9536CFC155950B2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> The Assets Under Management are primarily AARP assets that are managed separately from the general investment portfolio and are used to pay costs associated with the AARP program. </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_AarpAssetsUnderManagement" xlink:label="loc_unh_AarpAssetsUnderManagement_CF5D5681D92649DED9536CFC155950B2" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_AarpAssetsUnderManagement_CF5D5681D92649DED9536CFC155950B2" xlink:to="lab_unh_AarpAssetsUnderManagement_CF5D5681D92649DED9536CFC155950B2" xlink:type="arc"/>
<link:label id="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_DE18DFF7036214F23ABA6CFC15591A33_terseLabel_en-US" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_DE18DFF7036214F23ABA6CFC15591A33" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Prepaid expenses and other current assets </link:label>
<link:label id="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_DE18DFF7036214F23ABA6CFC15591A33_label_en-US" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_DE18DFF7036214F23ABA6CFC15591A33" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Prepaid Expense and Other Assets, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_DE18DFF7036214F23ABA6CFC15591A33" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AssetsCurrent_36643F9320B62B1E92406CFC15597242_totalLabel_en-US" xlink:label="lab_us-gaap_AssetsCurrent_36643F9320B62B1E92406CFC15597242" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total current assets </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_36643F9320B62B1E92406CFC15597242" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LongTermInvestments_4D0D27BBA54A315A2A106CFC155966CB_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermInvestments_4D0D27BBA54A315A2A106CFC155966CB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term investments </link:label>
<link:label id="lab_us-gaap_LongTermInvestments_4D0D27BBA54A315A2A106CFC155966CB_label_en-US" xlink:label="lab_us-gaap_LongTermInvestments_4D0D27BBA54A315A2A106CFC155966CB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Investments </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermInvestments" xlink:label="loc_us-gaap_LongTermInvestments_4D0D27BBA54A315A2A106CFC155966CB" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermInvestments_4D0D27BBA54A315A2A106CFC155966CB" xlink:to="lab_us-gaap_LongTermInvestments_4D0D27BBA54A315A2A106CFC155966CB" xlink:type="arc"/>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_3AB7AD28DEEB012B340E6CFC15597CFC_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_3AB7AD28DEEB012B340E6CFC15597CFC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property, equipment and capitalized software, net of accumulated depreciation and amortization of $3,694 and $3,749 </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_3AB7AD28DEEB012B340E6CFC15597CFC" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_3AB7AD28DEEB012B340E6CFC15597CFC" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentNet_3AB7AD28DEEB012B340E6CFC15597CFC" xlink:type="arc"/>
<link:label id="lab_us-gaap_Goodwill_3C9506B2306FAEEB877F6CFC1559EE36_terseLabel_en-US" xlink:label="lab_us-gaap_Goodwill_3C9506B2306FAEEB877F6CFC1559EE36" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Goodwill </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_3C9506B2306FAEEB877F6CFC1559EE36" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Goodwill_3C9506B2306FAEEB877F6CFC1559EE36" xlink:to="lab_us-gaap_Goodwill_3C9506B2306FAEEB877F6CFC1559EE36" xlink:type="arc"/>
<link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_C3C800EC77F30422D66C6CFC1559EB9B_verboseLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_C3C800EC77F30422D66C6CFC1559EB9B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Other intangible assets, net of accumulated amortization of $4,309 and $3,847 </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_C3C800EC77F30422D66C6CFC1559EB9B" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OtherAssetsNoncurrent_C9130A4526FF51F5275C6CFC15592819_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent_C9130A4526FF51F5275C6CFC15592819" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Other assets </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_C9130A4526FF51F5275C6CFC15592819" xlink:type="locator"/>
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<link:label id="lab_us-gaap_Assets_8C8AB55DDFF6534172696CFC1559B105_totalLabel_en-US" xlink:label="lab_us-gaap_Assets_8C8AB55DDFF6534172696CFC1559B105" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total assets </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_8C8AB55DDFF6534172696CFC1559B105" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets_8C8AB55DDFF6534172696CFC1559B105" xlink:to="lab_us-gaap_Assets_8C8AB55DDFF6534172696CFC1559B105" xlink:type="arc"/>
<link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_90F94F3FEFE0E5DAD7F16CFC1559167D_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_90F94F3FEFE0E5DAD7F16CFC1559167D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Liabilities, redeemable noncontrolling interests and equity </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_90F94F3FEFE0E5DAD7F16CFC1559167D" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_1D47AEF1441462A3F65C6CFC155ADCA0_verboseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_1D47AEF1441462A3F65C6CFC155ADCA0" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Medical costs payable </link:label>
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<link:label id="lab_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_7FFEB23A89B0620FD0406CFC155AE859_terseLabel_en-US" xlink:label="lab_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_7FFEB23A89B0620FD0406CFC155AE859" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Redeemable noncontrolling interests </link:label>
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<link:label id="lab_us-gaap_StockholdersEquityAbstract_4D217791FE671EFE8C1B6CFC155BB4F3_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract_4D217791FE671EFE8C1B6CFC155BB4F3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stockholders' Equity Attributable to Parent [Abstract] </link:label>
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<link:label id="lab_us-gaap_MinorityInterest_F632384804CB5392F1346CFC155B11BF_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterest_F632384804CB5392F1346CFC155B11BF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Nonredeemable noncontrolling interest </link:label>
<link:label id="lab_us-gaap_MinorityInterest_F632384804CB5392F1346CFC155B11BF_label_en-US" xlink:label="lab_us-gaap_MinorityInterest_F632384804CB5392F1346CFC155B11BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stockholders' Equity Attributable to Noncontrolling Interest </link:label>
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<link:label id="lab_us-gaap_CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTable_F2FAF007BC2BC733E9DE7C1AFBE197B7_terseLabel_en-US" xlink:label="lab_us-gaap_CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTable_F2FAF007BC2BC733E9DE7C1AFBE197B7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Table] </link:label>
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<link:label id="lab_us-gaap_CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseLineItems_AECE96B4F8171D8D69037C1AFBE18242_terseLabel_en-US" xlink:label="lab_us-gaap_CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseLineItems_AECE96B4F8171D8D69037C1AFBE18242" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] </link:label>
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<link:label id="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_61FA1D5A6105AB6D5A037C1AFBE1BA8C_periodStartLabel_en-US" xlink:label="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_61FA1D5A6105AB6D5A037C1AFBE1BA8C" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US"> Medical costs payable, beginning of period </link:label>
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<link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseBusinessAcquisitions_383742D089888BCDD7EF7C1AFBE16DAF_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseBusinessAcquisitions_383742D089888BCDD7EF7C1AFBE16DAF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Acquisitions </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseBusinessAcquisitions" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseBusinessAcquisitions_383742D089888BCDD7EF7C1AFBE16DAF" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract_979C68E021629790D0E67C1AFBE10089_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract_979C68E021629790D0E67C1AFBE10089" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Reported medical costs: </link:label>
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<link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_C728B6FA42487DCDB2547C1AFBE27A22_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_C728B6FA42487DCDB2547C1AFBE27A22" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total reported medical costs </link:label>
<link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_C728B6FA42487DCDB2547C1AFBE27A22_label_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_C728B6FA42487DCDB2547C1AFBE27A22" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_C728B6FA42487DCDB2547C1AFBE27A22" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_92968EC6C84EC5FD0BF27C1AFBE28801_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_92968EC6C84EC5FD0BF27C1AFBE28801" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Medical payments: </link:label>
<link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_92968EC6C84EC5FD0BF27C1AFBE28801_label_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_92968EC6C84EC5FD0BF27C1AFBE28801" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_92968EC6C84EC5FD0BF27C1AFBE28801" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_92968EC6C84EC5FD0BF27C1AFBE28801" xlink:to="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_92968EC6C84EC5FD0BF27C1AFBE28801" xlink:type="arc"/>
<link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_3E83ED0C218EC07306127C1AFBE25979_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_3E83ED0C218EC07306127C1AFBE25979" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Payments for current year </link:label>
<link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_3E83ED0C218EC07306127C1AFBE25979_label_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_3E83ED0C218EC07306127C1AFBE25979" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_3E83ED0C218EC07306127C1AFBE25979" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_3DACBF7A84B29B3005E77C1AFBE2C7AB_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_3DACBF7A84B29B3005E77C1AFBE2C7AB" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Payments for prior years </link:label>
<link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_3DACBF7A84B29B3005E77C1AFBE2C7AB_label_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_3DACBF7A84B29B3005E77C1AFBE2C7AB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_3DACBF7A84B29B3005E77C1AFBE2C7AB" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_3DACBF7A84B29B3005E77C1AFBE2C7AB" xlink:to="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_3DACBF7A84B29B3005E77C1AFBE2C7AB" xlink:type="arc"/>
<link:label id="lab_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_F7BF981A059386D827397C1AFBE2BF42_negatedTotalLabel_en-US" xlink:label="lab_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_F7BF981A059386D827397C1AFBE2BF42" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="en-US"> Total medical payments </link:label>
<link:label id="lab_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_F7BF981A059386D827397C1AFBE2BF42_label_en-US" xlink:label="lab_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_F7BF981A059386D827397C1AFBE2BF42" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForLossesAndLossAdjustmentExpense" xlink:label="loc_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_F7BF981A059386D827397C1AFBE2BF42" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_F7BF981A059386D827397C1AFBE2BF42" xlink:to="lab_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_F7BF981A059386D827397C1AFBE2BF42" xlink:type="arc"/>
<link:label id="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_D456F028707D75490F3E7C1AFBE21660_periodEndLabel_en-US" xlink:label="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_D456F028707D75490F3E7C1AFBE21660" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US"> Medical costs payable, end of period </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_D456F028707D75490F3E7C1AFBE21660" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_D456F028707D75490F3E7C1AFBE21660" xlink:to="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_D456F028707D75490F3E7C1AFBE21660" xlink:type="arc"/>
<link:label id="lab_unh_ScheduleIAbstract_20E1FE9095880B14F4558A89F1DCE621_label_en-US" xlink:label="lab_unh_ScheduleIAbstract_20E1FE9095880B14F4558A89F1DCE621" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule I [Abstract] </link:label>
<link:label id="lab_unh_ScheduleIAbstract_20E1FE9095880B14F4558A89F1DCE621_documentation_en-US" xlink:label="lab_unh_ScheduleIAbstract_20E1FE9095880B14F4558A89F1DCE621" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Schedule I [Abstract] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_ScheduleIAbstract" xlink:label="loc_unh_ScheduleIAbstract_20E1FE9095880B14F4558A89F1DCE621" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_ScheduleIAbstract_20E1FE9095880B14F4558A89F1DCE621" xlink:to="lab_unh_ScheduleIAbstract_20E1FE9095880B14F4558A89F1DCE621" xlink:type="arc"/>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_10E9BB080B5B1135DD0B8A89F1E045B0_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_10E9BB080B5B1135DD0B8A89F1E045B0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cash flows from operating activities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_10E9BB080B5B1135DD0B8A89F1E045B0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_10E9BB080B5B1135DD0B8A89F1E045B0" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_10E9BB080B5B1135DD0B8A89F1E045B0" xlink:type="arc"/>
<link:label id="lab_us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties_1487385D1DDD89EC48368A89F1E1E620_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties_1487385D1DDD89EC48368A89F1E1E620" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Repayments (issuances) of notes to subsidiaries </link:label>
<link:label id="lab_us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties_1487385D1DDD89EC48368A89F1E1E620_label_en-US" xlink:label="lab_us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties_1487385D1DDD89EC48368A89F1E1E620" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Proceeds from Collection of (Payments to Fund) Long-term Loans to Related Parties </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties" xlink:label="loc_us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties_1487385D1DDD89EC48368A89F1E1E620" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_195444D880767C5F1EDA8A89F1E1F2CC_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_195444D880767C5F1EDA8A89F1E1F2CC" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Cash paid for acquisitions </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_195444D880767C5F1EDA8A89F1E1F2CC" xlink:type="locator"/>
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<link:label id="lab_unh_Capitalcontributionstosubsidiaries_7AF75E6C7577C57139718A89F1E150E6_negatedTerseLabel_en-US" xlink:label="lab_unh_Capitalcontributionstosubsidiaries_7AF75E6C7577C57139718A89F1E150E6" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Capital contributions to subsidiaries </link:label>
<link:label id="lab_unh_Capitalcontributionstosubsidiaries_7AF75E6C7577C57139718A89F1E150E6_label_en-US" xlink:label="lab_unh_Capitalcontributionstosubsidiaries_7AF75E6C7577C57139718A89F1E150E6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital contributions to subsidiaries </link:label>
<link:label id="lab_unh_Capitalcontributionstosubsidiaries_7AF75E6C7577C57139718A89F1E150E6_documentation_en-US" xlink:label="lab_unh_Capitalcontributionstosubsidiaries_7AF75E6C7577C57139718A89F1E150E6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Capital contributions to subsidiaries </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_Capitalcontributionstosubsidiaries" xlink:label="loc_unh_Capitalcontributionstosubsidiaries_7AF75E6C7577C57139718A89F1E150E6" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_49FD4CFECB4B1D79B5438A89F1E16517_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_49FD4CFECB4B1D79B5438A89F1E16517" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other, net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_49FD4CFECB4B1D79B5438A89F1E16517" xlink:type="locator"/>
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<link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_74956DFF26DEC79FCE228A89F1E18286_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_74956DFF26DEC79FCE228A89F1E18286" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cash flows from (used for) investing activities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_74956DFF26DEC79FCE228A89F1E18286" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_FF71B5FEB79B27A520AE8A89F1E11D91_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_FF71B5FEB79B27A520AE8A89F1E11D91" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Common stock repurchases </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_FF71B5FEB79B27A520AE8A89F1E11D91" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PaymentsOfDividends_61BBD0795A58066C019B8A89F1E10218_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDividends_61BBD0795A58066C019B8A89F1E10218" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Cash dividends paid </link:label>
<link:label id="lab_us-gaap_PaymentsOfDividends_61BBD0795A58066C019B8A89F1E10218_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDividends_61BBD0795A58066C019B8A89F1E10218" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments of Dividends </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsOfDividends" xlink:label="loc_us-gaap_PaymentsOfDividends_61BBD0795A58066C019B8A89F1E10218" xlink:type="locator"/>
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<link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_4A05D7ECA5BB42F7774B8A89F1E20FF4_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_4A05D7ECA5BB42F7774B8A89F1E20FF4" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Repayments of long-term debt </link:label>
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<link:label id="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_FEE97FABF4C942AE83C97C1AFDD5C0E7_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_FEE97FABF4C942AE83C97C1AFDD5C0E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Net Unrealized Gains (Losses) on Investments [Member] </link:label>
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<link:label id="lab_us-gaap_AccumulatedTranslationAdjustmentMember_6328917EFEA9A0B406407C1AFDD5F7E3_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedTranslationAdjustmentMember_6328917EFEA9A0B406407C1AFDD5F7E3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Foreign Currency Translation Losses [Member] </link:label>
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<link:label id="lab_us-gaap_NetIncomeLossAttributableToNonredeemableNoncontrollingInterest_175DE93EFD428D257B197C1AFDD625B8_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNonredeemableNoncontrollingInterest_175DE93EFD428D257B197C1AFDD625B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest </link:label>
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<link:label id="lab_us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_39880478A0D901F93F207C1AFDD65979_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_39880478A0D901F93F207C1AFDD65979" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Net earnings including portion attributable to nonredeemable noncontrolling interest </link:label>
<link:label id="lab_us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_39880478A0D901F93F207C1AFDD65979_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_39880478A0D901F93F207C1AFDD65979" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest </link:label>
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<link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2544C64AC1E95217BC1E7C1AFDD67CF7_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2544C64AC1E95217BC1E7C1AFDD67CF7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other comprehensive income (loss) </link:label>
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<link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_59A4D79663AF358839E47C1AFDD65A29_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_59A4D79663AF358839E47C1AFDD65A29" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Issuances of common stock, and related tax effects (in shares) </link:label>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_59A4D79663AF358839E47C1AFDD65A29_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_59A4D79663AF358839E47C1AFDD65A29" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stock Issued During Period, Shares, New Issues </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_59A4D79663AF358839E47C1AFDD65A29" xlink:type="locator"/>
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<link:label id="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_6B59B5C242B1C4744A897C1AFDD63C83_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_6B59B5C242B1C4744A897C1AFDD63C83" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Issuances of common stock, and related tax effects </link:label>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_6B59B5C242B1C4744A897C1AFDD63C83_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_6B59B5C242B1C4744A897C1AFDD63C83" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stock Issued During Period, Value, New Issues </link:label>
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<link:label id="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross_54DB5C6EE58F9D46E5327C1AFDD67195_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross_54DB5C6EE58F9D46E5327C1AFDD67195" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Share-based Compensation </link:label>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross_54DB5C6EE58F9D46E5327C1AFDD67195_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross_54DB5C6EE58F9D46E5327C1AFDD67195" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stock Issued During Period, Value, Share-based Compensation, Gross </link:label>
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<link:label id="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_DB832FEE250B93000FAF7C1AFDD6962B_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_DB832FEE250B93000FAF7C1AFDD6962B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Share-based compensation, and related tax benefits </link:label>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_DB832FEE250B93000FAF7C1AFDD6962B_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_DB832FEE250B93000FAF7C1AFDD6962B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_DB832FEE250B93000FAF7C1AFDD6962B" xlink:type="locator"/>
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<link:label id="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_2A7DA7B83B0FB203646E7C1AFDD6AEAD_negatedLabel_en-US" xlink:label="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_2A7DA7B83B0FB203646E7C1AFDD6AEAD" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Common shares repurchases, shares </link:label>
<link:label id="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_2A7DA7B83B0FB203646E7C1AFDD6AEAD_label_en-US" xlink:label="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_2A7DA7B83B0FB203646E7C1AFDD6AEAD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stock Repurchased and Retired During Period, Shares </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_2A7DA7B83B0FB203646E7C1AFDD6AEAD" xlink:type="locator"/>
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<link:label id="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_4EB30172B46F9E2B28657C1AFDD6B5A0_negatedLabel_en-US" xlink:label="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_4EB30172B46F9E2B28657C1AFDD6B5A0" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Common share repurchases </link:label>
<link:label id="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_4EB30172B46F9E2B28657C1AFDD6B5A0_label_en-US" xlink:label="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_4EB30172B46F9E2B28657C1AFDD6B5A0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stock Repurchased and Retired During Period, Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_4EB30172B46F9E2B28657C1AFDD6B5A0" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DividendsCash_4CE5B671AA6AC72A32937C1AFDD61CEB_negatedLabel_en-US" xlink:label="lab_us-gaap_DividendsCash_4CE5B671AA6AC72A32937C1AFDD61CEB" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Cash dividends paid on common shares </link:label>
<link:label id="lab_us-gaap_DividendsCash_4CE5B671AA6AC72A32937C1AFDD61CEB_label_en-US" xlink:label="lab_us-gaap_DividendsCash_4CE5B671AA6AC72A32937C1AFDD61CEB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Dividends, Cash </link:label>
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<link:label id="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_29A570A801B7C799E8047C1AFDD7D2F4_negatedLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_29A570A801B7C799E8047C1AFDD7D2F4" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Acquisition of redeemable noncontrolling interest shares </link:label>
<link:label id="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_29A570A801B7C799E8047C1AFDD7D2F4_label_en-US" xlink:label="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_29A570A801B7C799E8047C1AFDD7D2F4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests </link:label>
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<link:label id="lab_us-gaap_MinorityInterestChangeInRedemptionValue_E6713A8D67891D2F463A7C1AFDD7B647_negatedLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestChangeInRedemptionValue_E6713A8D67891D2F463A7C1AFDD7B647" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Redeemable noncontrolling interests fair value and other adjustments </link:label>
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<link:label id="lab_us-gaap_MinorityInterestTable_99849D3C4100A7CCC5AE50C3FAE660A1_label_en-US" xlink:label="lab_us-gaap_MinorityInterestTable_99849D3C4100A7CCC5AE50C3FAE660A1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest [Table] </link:label>
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<link:label id="lab_us-gaap_BalanceSheetLocationDomain_343D70A840384018455A50C3FAE67B0A_label_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationDomain_343D70A840384018455A50C3FAE67B0A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Balance Sheet Location [Domain] </link:label>
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<link:loc xlink:href="unh-20171231.xsd#unh_RedeemableNoncontrollingInterestsMember" xlink:label="loc_unh_RedeemableNoncontrollingInterestsMember_E3FB4B26075BAF1302C550C3FAE6492C" xlink:type="locator"/>
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<link:label id="lab_us-gaap_MinorityInterestLineItems_99D9B244934E135E2CE750C3FAE766D2_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestLineItems_99D9B244934E135E2CE750C3FAE766D2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest [Line Items] </link:label>
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<link:label id="lab_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_89823801E081BED27B7750C3FAE7DAD9_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_89823801E081BED27B7750C3FAE7DAD9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Net earnings </link:label>
<link:label id="lab_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_89823801E081BED27B7750C3FAE7DAD9_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_89823801E081BED27B7750C3FAE7DAD9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Income (Loss) Attributable to Redeemable Noncontrolling Interest </link:label>
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<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_61D0670203B2F598AE3D7641E3DD4C9D_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_61D0670203B2F598AE3D7641E3DD4C9D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2019 </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_61D0670203B2F598AE3D7641E3DD4C9D_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_61D0670203B2F598AE3D7641E3DD4C9D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Amortization Expense, Year Two </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_61D0670203B2F598AE3D7641E3DD4C9D" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_69C1323FADF35B33CA237641E3DD2A04_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_69C1323FADF35B33CA237641E3DD2A04" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2020 </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_69C1323FADF35B33CA237641E3DD2A04_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_69C1323FADF35B33CA237641E3DD2A04" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Amortization Expense, Year Three </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_69C1323FADF35B33CA237641E3DD2A04" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_AAF9F76CF0FB6F7E7EE87641E3DDF16B_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_AAF9F76CF0FB6F7E7EE87641E3DDF16B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2021 </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_AAF9F76CF0FB6F7E7EE87641E3DDF16B_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_AAF9F76CF0FB6F7E7EE87641E3DDF16B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Amortization Expense, Year Four </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_AAF9F76CF0FB6F7E7EE87641E3DDF16B" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_E77790EF2C3D538E44707641E3DD311D_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_E77790EF2C3D538E44707641E3DD311D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2022 </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_E77790EF2C3D538E44707641E3DD311D_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_E77790EF2C3D538E44707641E3DD311D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Amortization Expense, Year Five </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_E77790EF2C3D538E44707641E3DD311D" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncomeTaxExaminationTable_DD328CF398D48D298E6950C3F9F96E78_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExaminationTable_DD328CF398D48D298E6950C3F9F96E78" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Income Tax Examination [Table] </link:label>
<link:label id="lab_us-gaap_IncomeTaxExaminationTable_DD328CF398D48D298E6950C3F9F96E78_label_en-US" xlink:label="lab_us-gaap_IncomeTaxExaminationTable_DD328CF398D48D298E6950C3F9F96E78" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Tax Examination [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExaminationTable" xlink:label="loc_us-gaap_IncomeTaxExaminationTable_DD328CF398D48D298E6950C3F9F96E78" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncomeTaxExaminationLineItems_E1B193CE4DF7D045531C50C3F9F930A7_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExaminationLineItems_E1B193CE4DF7D045531C50C3F9F930A7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Income Tax Examination [Line Items] </link:label>
<link:label id="lab_us-gaap_IncomeTaxExaminationLineItems_E1B193CE4DF7D045531C50C3F9F930A7_label_en-US" xlink:label="lab_us-gaap_IncomeTaxExaminationLineItems_E1B193CE4DF7D045531C50C3F9F930A7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Tax Examination [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExaminationLineItems" xlink:label="loc_us-gaap_IncomeTaxExaminationLineItems_E1B193CE4DF7D045531C50C3F9F930A7" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncomeTaxDisclosureTextBlock_07163FB989528BE7B5A550C3F9F90297_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureTextBlock_07163FB989528BE7B5A550C3F9F90297" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Income Tax Disclosure [Text Block] </link:label>
<link:label id="lab_us-gaap_IncomeTaxDisclosureTextBlock_07163FB989528BE7B5A550C3F9F90297_label_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureTextBlock_07163FB989528BE7B5A550C3F9F90297" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Tax Disclosure [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="loc_us-gaap_IncomeTaxDisclosureTextBlock_07163FB989528BE7B5A550C3F9F90297" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTable_5F7E59531199CDC007456CFF32A456FA_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTable_5F7E59531199CDC007456CFF32A456FA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Fair Value, by Balance Sheet Grouping [Table] </link:label>
<link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTable_5F7E59531199CDC007456CFF32A456FA_label_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTable_5F7E59531199CDC007456CFF32A456FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value, by Balance Sheet Grouping [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_5F7E59531199CDC007456CFF32A456FA" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FairValueMeasurementsNonrecurringMember_9441D23BA6A24C5B5A2D6CFF32A4B39B_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsNonrecurringMember_9441D23BA6A24C5B5A2D6CFF32A4B39B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Fair Value, Measurements, Nonrecurring [Member] </link:label>
<link:label id="lab_us-gaap_FairValueMeasurementsNonrecurringMember_9441D23BA6A24C5B5A2D6CFF32A4B39B_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsNonrecurringMember_9441D23BA6A24C5B5A2D6CFF32A4B39B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value, Measurements, Nonrecurring [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsNonrecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsNonrecurringMember_9441D23BA6A24C5B5A2D6CFF32A4B39B" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FairValueInputsLevel3Member_6DEB76FABFD47A0471056CFF32A5017F_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member_6DEB76FABFD47A0471056CFF32A5017F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value, Inputs, Level 3 [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_6DEB76FABFD47A0471056CFF32A5017F" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_AE2C796CBB2C839C10F16CFF32A50E6C_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_AE2C796CBB2C839C10F16CFF32A50E6C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Fair Value [Line Items] </link:label>
<link:label id="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_AE2C796CBB2C839C10F16CFF32A50E6C_label_en-US" xlink:label="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_AE2C796CBB2C839C10F16CFF32A50E6C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] </link:label>
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<link:label id="lab_us-gaap_FairValueAssetsLevel1ToLevel2TransfersAmount_56CB0B3D2B59737A07F56CFF32A5704A_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsLevel1ToLevel2TransfersAmount_56CB0B3D2B59737A07F56CFF32A5704A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Transfers from level 1 to level 2-Assets </link:label>
<link:label id="lab_us-gaap_FairValueAssetsLevel1ToLevel2TransfersAmount_56CB0B3D2B59737A07F56CFF32A5704A_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsLevel1ToLevel2TransfersAmount_56CB0B3D2B59737A07F56CFF32A5704A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value, Assets, Level 1 to Level 2 Transfers, Amount </link:label>
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<link:label id="lab_us-gaap_FairValueLiabilitiesLevel1ToLevel2TransfersAmount_CB824848EB1C45072F6D6CFF32A5C1EE_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesLevel1ToLevel2TransfersAmount_CB824848EB1C45072F6D6CFF32A5C1EE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Transfers from level 1 to level 2-Liabilities </link:label>
<link:label id="lab_us-gaap_FairValueLiabilitiesLevel1ToLevel2TransfersAmount_CB824848EB1C45072F6D6CFF32A5C1EE_label_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesLevel1ToLevel2TransfersAmount_CB824848EB1C45072F6D6CFF32A5C1EE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value, Liabilities, Level 1 to Level 2 Transfers, Amount </link:label>
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<link:label id="lab_us-gaap_FairValueAssetsLevel2ToLevel1TransfersAmount_C7C24F7727EC34EC39C36CFF32A54B6B_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsLevel2ToLevel1TransfersAmount_C7C24F7727EC34EC39C36CFF32A54B6B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value, Assets, Level 2 to Level 1 Transfers, Amount </link:label>
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<link:label id="lab_us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersAmount_49EC44017692366BA2506CFF32A5111B_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersAmount_49EC44017692366BA2506CFF32A5111B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Transfer from level 2 to level 1-Liabilities </link:label>
<link:label id="lab_us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersAmount_49EC44017692366BA2506CFF32A5111B_label_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersAmount_49EC44017692366BA2506CFF32A5111B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value, Liabilities, Level 2 to Level 1 Transfers, Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersAmount" xlink:label="loc_us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersAmount_49EC44017692366BA2506CFF32A5111B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersAmount_49EC44017692366BA2506CFF32A5111B" xlink:to="lab_us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersAmount_49EC44017692366BA2506CFF32A5111B" xlink:type="arc"/>
<link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_AC4D4AE35C771CA68D946CFF32A568C6_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_AC4D4AE35C771CA68D946CFF32A568C6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Transfers Into Level 3 </link:label>
<link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_AC4D4AE35C771CA68D946CFF32A568C6_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_AC4D4AE35C771CA68D946CFF32A568C6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_AC4D4AE35C771CA68D946CFF32A568C6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_AC4D4AE35C771CA68D946CFF32A568C6" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_AC4D4AE35C771CA68D946CFF32A568C6" xlink:type="arc"/>
<link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_D6214E006D8D1A1BC40F6CFF32A5F807_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_D6214E006D8D1A1BC40F6CFF32A5F807" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Transfers out of Level 3 </link:label>
<link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_D6214E006D8D1A1BC40F6CFF32A5F807_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_D6214E006D8D1A1BC40F6CFF32A5F807" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_D6214E006D8D1A1BC40F6CFF32A5F807" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_D6214E006D8D1A1BC40F6CFF32A5F807" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_D6214E006D8D1A1BC40F6CFF32A5F807" xlink:type="arc"/>
<link:label id="lab_unh_FairValueAdjustmentsForNonfinancialAssetsAndLiabilitiesMeasuredAtFairValueOrFinancialAssetsandLiabilitiesNonRecurringBasis_B05C4BF1C43AC95F5D756CFF32A51099_terseLabel_en-US" xlink:label="lab_unh_FairValueAdjustmentsForNonfinancialAssetsAndLiabilitiesMeasuredAtFairValueOrFinancialAssetsandLiabilitiesNonRecurringBasis_B05C4BF1C43AC95F5D756CFF32A51099" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Significant fair value adjustments for assets and liabilities measured on a nonrecurring basis </link:label>
<link:label id="lab_unh_FairValueAdjustmentsForNonfinancialAssetsAndLiabilitiesMeasuredAtFairValueOrFinancialAssetsandLiabilitiesNonRecurringBasis_B05C4BF1C43AC95F5D756CFF32A51099_label_en-US" xlink:label="lab_unh_FairValueAdjustmentsForNonfinancialAssetsAndLiabilitiesMeasuredAtFairValueOrFinancialAssetsandLiabilitiesNonRecurringBasis_B05C4BF1C43AC95F5D756CFF32A51099" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value Adjustments For Nonfinancial Assets And Liabilities Measured At Fair Value Or Financial Assets and Liabilities Non Recurring Basis </link:label>
<link:label id="lab_unh_FairValueAdjustmentsForNonfinancialAssetsAndLiabilitiesMeasuredAtFairValueOrFinancialAssetsandLiabilitiesNonRecurringBasis_B05C4BF1C43AC95F5D756CFF32A51099_documentation_en-US" xlink:label="lab_unh_FairValueAdjustmentsForNonfinancialAssetsAndLiabilitiesMeasuredAtFairValueOrFinancialAssetsandLiabilitiesNonRecurringBasis_B05C4BF1C43AC95F5D756CFF32A51099" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Fair Value Adjustments For Nonfinancial Assets And Liabilities Measured At Fair Value Or Financial Assets and Liabilities On Non Recurring Basis </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_FairValueAdjustmentsForNonfinancialAssetsAndLiabilitiesMeasuredAtFairValueOrFinancialAssetsandLiabilitiesNonRecurringBasis" xlink:label="loc_unh_FairValueAdjustmentsForNonfinancialAssetsAndLiabilitiesMeasuredAtFairValueOrFinancialAssetsandLiabilitiesNonRecurringBasis_B05C4BF1C43AC95F5D756CFF32A51099" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_FairValueAdjustmentsForNonfinancialAssetsAndLiabilitiesMeasuredAtFairValueOrFinancialAssetsandLiabilitiesNonRecurringBasis_B05C4BF1C43AC95F5D756CFF32A51099" xlink:to="lab_unh_FairValueAdjustmentsForNonfinancialAssetsAndLiabilitiesMeasuredAtFairValueOrFinancialAssetsandLiabilitiesNonRecurringBasis_B05C4BF1C43AC95F5D756CFF32A51099" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtDisclosureTextBlock_854771840B2084D78C6950C3FB39B640_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock_854771840B2084D78C6950C3FB39B640" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Commercial Paper and Long-Term Debt [Text Block] </link:label>
<link:label id="lab_us-gaap_DebtDisclosureTextBlock_854771840B2084D78C6950C3FB39B640_label_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock_854771840B2084D78C6950C3FB39B640" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Disclosure [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="loc_us-gaap_DebtDisclosureTextBlock_854771840B2084D78C6950C3FB39B640" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtDisclosureTextBlock_854771840B2084D78C6950C3FB39B640" xlink:to="lab_us-gaap_DebtDisclosureTextBlock_854771840B2084D78C6950C3FB39B640" xlink:type="arc"/>
<link:label id="lab_unh_BasisofpresentationAbstract_158ABF1A2487CCED8BA26CF034054110_label_en-US" xlink:label="lab_unh_BasisofpresentationAbstract_158ABF1A2487CCED8BA26CF034054110" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Basis of presentation [Abstract] </link:label>
<link:label id="lab_unh_BasisofpresentationAbstract_158ABF1A2487CCED8BA26CF034054110_documentation_en-US" xlink:label="lab_unh_BasisofpresentationAbstract_158ABF1A2487CCED8BA26CF034054110" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Basis of presentation [Abstract] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_BasisofpresentationAbstract" xlink:label="loc_unh_BasisofpresentationAbstract_158ABF1A2487CCED8BA26CF034054110" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_BasisofpresentationAbstract_158ABF1A2487CCED8BA26CF034054110" xlink:to="lab_unh_BasisofpresentationAbstract_158ABF1A2487CCED8BA26CF034054110" xlink:type="arc"/>
<link:label id="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_BD22EE43FA8CA73155976CF03406FDF6_terseLabel_en-US" xlink:label="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_BD22EE43FA8CA73155976CF03406FDF6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Basis of Accounting, Policy [Policy Text Block] </link:label>
<link:label id="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_BD22EE43FA8CA73155976CF03406FDF6_label_en-US" xlink:label="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_BD22EE43FA8CA73155976CF03406FDF6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Basis of Accounting, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:label="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_BD22EE43FA8CA73155976CF03406FDF6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_BD22EE43FA8CA73155976CF03406FDF6" xlink:to="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_BD22EE43FA8CA73155976CF03406FDF6" xlink:type="arc"/>
<link:label id="lab_us-gaap_UseOfEstimates_A50D9BFC2F3B995A15A06CF034066280_terseLabel_en-US" xlink:label="lab_us-gaap_UseOfEstimates_A50D9BFC2F3B995A15A06CF034066280" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Use of Estimates, Policy [Policy Text Block] </link:label>
<link:label id="lab_us-gaap_UseOfEstimates_A50D9BFC2F3B995A15A06CF034066280_label_en-US" xlink:label="lab_us-gaap_UseOfEstimates_A50D9BFC2F3B995A15A06CF034066280" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Use of Estimates, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UseOfEstimates" xlink:label="loc_us-gaap_UseOfEstimates_A50D9BFC2F3B995A15A06CF034066280" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UseOfEstimates_A50D9BFC2F3B995A15A06CF034066280" xlink:to="lab_us-gaap_UseOfEstimates_A50D9BFC2F3B995A15A06CF034066280" xlink:type="arc"/>
<link:label id="lab_us-gaap_RevenueRecognitionPolicyTextBlock_48AD67A576782A32420E6CF034061CA9_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueRecognitionPolicyTextBlock_48AD67A576782A32420E6CF034061CA9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Revenue Recognition, Policy [Policy Text Block] </link:label>
<link:label id="lab_us-gaap_RevenueRecognitionPolicyTextBlock_48AD67A576782A32420E6CF034061CA9_label_en-US" xlink:label="lab_us-gaap_RevenueRecognitionPolicyTextBlock_48AD67A576782A32420E6CF034061CA9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Revenue Recognition, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RevenueRecognitionPolicyTextBlock" xlink:label="loc_us-gaap_RevenueRecognitionPolicyTextBlock_48AD67A576782A32420E6CF034061CA9" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueRecognitionPolicyTextBlock_48AD67A576782A32420E6CF034061CA9" xlink:to="lab_us-gaap_RevenueRecognitionPolicyTextBlock_48AD67A576782A32420E6CF034061CA9" xlink:type="arc"/>
<link:label id="lab_us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy_BCECFA58FEC0150A83236CF0340632DD_terseLabel_en-US" xlink:label="lab_us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy_BCECFA58FEC0150A83236CF0340632DD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Medical Costs and Medical Costs Payable [Policy Text Block] </link:label>
<link:label id="lab_us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy_BCECFA58FEC0150A83236CF0340632DD_label_en-US" xlink:label="lab_us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy_BCECFA58FEC0150A83236CF0340632DD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Unpaid Policy Claims and Claims Adjustment Expense, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy" xlink:label="loc_us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy_BCECFA58FEC0150A83236CF0340632DD" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy_BCECFA58FEC0150A83236CF0340632DD" xlink:to="lab_us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy_BCECFA58FEC0150A83236CF0340632DD" xlink:type="arc"/>
<link:label id="lab_us-gaap_CostOfSalesPolicyTextBlock_3E4D73D994229D1C8B566CF03406AE8C_terseLabel_en-US" xlink:label="lab_us-gaap_CostOfSalesPolicyTextBlock_3E4D73D994229D1C8B566CF03406AE8C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cost of Sales, Policy [Policy Text Block] </link:label>
<link:label id="lab_us-gaap_CostOfSalesPolicyTextBlock_3E4D73D994229D1C8B566CF03406AE8C_label_en-US" xlink:label="lab_us-gaap_CostOfSalesPolicyTextBlock_3E4D73D994229D1C8B566CF03406AE8C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Cost of Sales, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostOfSalesPolicyTextBlock" xlink:label="loc_us-gaap_CostOfSalesPolicyTextBlock_3E4D73D994229D1C8B566CF03406AE8C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostOfSalesPolicyTextBlock_3E4D73D994229D1C8B566CF03406AE8C" xlink:to="lab_us-gaap_CostOfSalesPolicyTextBlock_3E4D73D994229D1C8B566CF03406AE8C" xlink:type="arc"/>
<link:label id="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_FC8C9481F5226DF3B5856CF03406A279_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_FC8C9481F5226DF3B5856CF03406A279" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cash and Cash Equivalents, Policy [Policy Text Block] </link:label>
<link:label id="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_FC8C9481F5226DF3B5856CF03406A279_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_FC8C9481F5226DF3B5856CF03406A279" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Cash and Cash Equivalents, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:label="loc_us-gaap_CashAndCashEquivalentsPolicyTextBlock_FC8C9481F5226DF3B5856CF03406A279" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsPolicyTextBlock_FC8C9481F5226DF3B5856CF03406A279" xlink:to="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_FC8C9481F5226DF3B5856CF03406A279" xlink:type="arc"/>
<link:label id="lab_us-gaap_InvestmentPolicyTextBlock_3EC5C86B608C70EE58D26CF034073637_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentPolicyTextBlock_3EC5C86B608C70EE58D26CF034073637" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Investment, Policy [Policy Text Block] </link:label>
<link:label id="lab_us-gaap_InvestmentPolicyTextBlock_3EC5C86B608C70EE58D26CF034073637_label_en-US" xlink:label="lab_us-gaap_InvestmentPolicyTextBlock_3EC5C86B608C70EE58D26CF034073637" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Investment, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentPolicyTextBlock" xlink:label="loc_us-gaap_InvestmentPolicyTextBlock_3EC5C86B608C70EE58D26CF034073637" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentPolicyTextBlock_3EC5C86B608C70EE58D26CF034073637" xlink:to="lab_us-gaap_InvestmentPolicyTextBlock_3EC5C86B608C70EE58D26CF034073637" xlink:type="arc"/>
<link:label id="lab_unh_AARPAssetsUnderManagementPolicyTextBlock_F3BD5A3EC075A7F873146CF03407903B_terseLabel_en-US" xlink:label="lab_unh_AARPAssetsUnderManagementPolicyTextBlock_F3BD5A3EC075A7F873146CF03407903B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> AARP Assets Under Management [Policy Text Block] </link:label>
<link:label id="lab_unh_AARPAssetsUnderManagementPolicyTextBlock_F3BD5A3EC075A7F873146CF03407903B_label_en-US" xlink:label="lab_unh_AARPAssetsUnderManagementPolicyTextBlock_F3BD5A3EC075A7F873146CF03407903B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> AARP Assets Under Management [Policy Text Block] </link:label>
<link:label id="lab_unh_AARPAssetsUnderManagementPolicyTextBlock_F3BD5A3EC075A7F873146CF03407903B_documentation_en-US" xlink:label="lab_unh_AARPAssetsUnderManagementPolicyTextBlock_F3BD5A3EC075A7F873146CF03407903B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> AARP Assets Under Management [Policy Text Block] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_AARPAssetsUnderManagementPolicyTextBlock" xlink:label="loc_unh_AARPAssetsUnderManagementPolicyTextBlock_F3BD5A3EC075A7F873146CF03407903B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_AARPAssetsUnderManagementPolicyTextBlock_F3BD5A3EC075A7F873146CF03407903B" xlink:to="lab_unh_AARPAssetsUnderManagementPolicyTextBlock_F3BD5A3EC075A7F873146CF03407903B" xlink:type="arc"/>
<link:label id="lab_us-gaap_ReceivablesPolicyTextBlock_045FB89C0F4353B729386CF034072F59_terseLabel_en-US" xlink:label="lab_us-gaap_ReceivablesPolicyTextBlock_045FB89C0F4353B729386CF034072F59" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Receivables, Policy [Policy Text Block] </link:label>
<link:label id="lab_us-gaap_ReceivablesPolicyTextBlock_045FB89C0F4353B729386CF034072F59_label_en-US" xlink:label="lab_us-gaap_ReceivablesPolicyTextBlock_045FB89C0F4353B729386CF034072F59" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Receivables, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReceivablesPolicyTextBlock" xlink:label="loc_us-gaap_ReceivablesPolicyTextBlock_045FB89C0F4353B729386CF034072F59" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReceivablesPolicyTextBlock_045FB89C0F4353B729386CF034072F59" xlink:to="lab_us-gaap_ReceivablesPolicyTextBlock_045FB89C0F4353B729386CF034072F59" xlink:type="arc"/>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_9804BCC0FB055E52233F6CF03407298D_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_9804BCC0FB055E52233F6CF03407298D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Policy [Policy Text Block] </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_9804BCC0FB055E52233F6CF03407298D_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_9804BCC0FB055E52233F6CF03407298D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_9804BCC0FB055E52233F6CF03407298D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_9804BCC0FB055E52233F6CF03407298D" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_9804BCC0FB055E52233F6CF03407298D" xlink:type="arc"/>
<link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_FC8DA07097571488E2536CF03407C350_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_FC8DA07097571488E2536CF03407C350" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] </link:label>
<link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_FC8DA07097571488E2536CF03407C350_label_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_FC8DA07097571488E2536CF03407C350" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_FC8DA07097571488E2536CF03407C350" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_FC8DA07097571488E2536CF03407C350" xlink:to="lab_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_FC8DA07097571488E2536CF03407C350" xlink:type="arc"/>
<link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy_BBC7CE21459335D3FB0A6CF03407E9ED_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy_BBC7CE21459335D3FB0A6CF03407E9ED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] </link:label>
<link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy_BBC7CE21459335D3FB0A6CF03407E9ED_label_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy_BBC7CE21459335D3FB0A6CF03407E9ED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy_BBC7CE21459335D3FB0A6CF03407E9ED" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy_BBC7CE21459335D3FB0A6CF03407E9ED" xlink:to="lab_us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy_BBC7CE21459335D3FB0A6CF03407E9ED" xlink:type="arc"/>
<link:label id="lab_unh_OtherLiabilitiesCurrentPolicyTextBlock_D94CD0B99C247108D6A76CF034072912_terseLabel_en-US" xlink:label="lab_unh_OtherLiabilitiesCurrentPolicyTextBlock_D94CD0B99C247108D6A76CF034072912" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other Current Liabilities [Policy Text Block] </link:label>
<link:label id="lab_unh_OtherLiabilitiesCurrentPolicyTextBlock_D94CD0B99C247108D6A76CF034072912_label_en-US" xlink:label="lab_unh_OtherLiabilitiesCurrentPolicyTextBlock_D94CD0B99C247108D6A76CF034072912" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Liabilities, Current [Policy Text Block] </link:label>
<link:label id="lab_unh_OtherLiabilitiesCurrentPolicyTextBlock_D94CD0B99C247108D6A76CF034072912_documentation_en-US" xlink:label="lab_unh_OtherLiabilitiesCurrentPolicyTextBlock_D94CD0B99C247108D6A76CF034072912" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Other Liabilities, Current [Policy Text Block] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_OtherLiabilitiesCurrentPolicyTextBlock" xlink:label="loc_unh_OtherLiabilitiesCurrentPolicyTextBlock_D94CD0B99C247108D6A76CF034072912" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_OtherLiabilitiesCurrentPolicyTextBlock_D94CD0B99C247108D6A76CF034072912" xlink:to="lab_unh_OtherLiabilitiesCurrentPolicyTextBlock_D94CD0B99C247108D6A76CF034072912" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalizationOfDeferredPolicyAcquisitionCostsPolicy_3F537FA3B79B1EAE6AE96CF034070A60_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalizationOfDeferredPolicyAcquisitionCostsPolicy_3F537FA3B79B1EAE6AE96CF034070A60" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Deferred Policy Acquisition Costs, Policy [Policy Text Block] </link:label>
<link:label id="lab_us-gaap_CapitalizationOfDeferredPolicyAcquisitionCostsPolicy_3F537FA3B79B1EAE6AE96CF034070A60_label_en-US" xlink:label="lab_us-gaap_CapitalizationOfDeferredPolicyAcquisitionCostsPolicy_3F537FA3B79B1EAE6AE96CF034070A60" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Deferred Policy Acquisition Costs, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalizationOfDeferredPolicyAcquisitionCostsPolicy" xlink:label="loc_us-gaap_CapitalizationOfDeferredPolicyAcquisitionCostsPolicy_3F537FA3B79B1EAE6AE96CF034070A60" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalizationOfDeferredPolicyAcquisitionCostsPolicy_3F537FA3B79B1EAE6AE96CF034070A60" xlink:to="lab_us-gaap_CapitalizationOfDeferredPolicyAcquisitionCostsPolicy_3F537FA3B79B1EAE6AE96CF034070A60" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_AEAA2407CF5347C642D46CF0340705EB_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_AEAA2407CF5347C642D46CF0340705EB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_AEAA2407CF5347C642D46CF0340705EB_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_AEAA2407CF5347C642D46CF0340705EB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy" xlink:label="loc_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_AEAA2407CF5347C642D46CF0340705EB" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_AEAA2407CF5347C642D46CF0340705EB" xlink:to="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_AEAA2407CF5347C642D46CF0340705EB" xlink:type="arc"/>
<link:label id="lab_us-gaap_EarningsPerSharePolicyTextBlock_BCC8A2BFE3F30F2F79C26CF03407A2AE_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerSharePolicyTextBlock_BCC8A2BFE3F30F2F79C26CF03407A2AE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Earnings Per Share, Policy [Policy Text Block] </link:label>
<link:label id="lab_us-gaap_EarningsPerSharePolicyTextBlock_BCC8A2BFE3F30F2F79C26CF03407A2AE_label_en-US" xlink:label="lab_us-gaap_EarningsPerSharePolicyTextBlock_BCC8A2BFE3F30F2F79C26CF03407A2AE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Earnings Per Share, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:label="loc_us-gaap_EarningsPerSharePolicyTextBlock_BCC8A2BFE3F30F2F79C26CF03407A2AE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerSharePolicyTextBlock_BCC8A2BFE3F30F2F79C26CF03407A2AE" xlink:to="lab_us-gaap_EarningsPerSharePolicyTextBlock_BCC8A2BFE3F30F2F79C26CF03407A2AE" xlink:type="arc"/>
<link:label id="lab_us-gaap_IndustrySpecificPoliciesInsuranceCompaniesTextBlock_57A04455DAC62D4B16C86CF034084C65_terseLabel_en-US" xlink:label="lab_us-gaap_IndustrySpecificPoliciesInsuranceCompaniesTextBlock_57A04455DAC62D4B16C86CF034084C65" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Health Insurance Industry Tax, Policy [Policy Text Block] </link:label>
<link:label id="lab_us-gaap_IndustrySpecificPoliciesInsuranceCompaniesTextBlock_57A04455DAC62D4B16C86CF034084C65_label_en-US" xlink:label="lab_us-gaap_IndustrySpecificPoliciesInsuranceCompaniesTextBlock_57A04455DAC62D4B16C86CF034084C65" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Industry Specific Policies, Insurance Companies [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndustrySpecificPoliciesInsuranceCompaniesTextBlock" xlink:label="loc_us-gaap_IndustrySpecificPoliciesInsuranceCompaniesTextBlock_57A04455DAC62D4B16C86CF034084C65" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IndustrySpecificPoliciesInsuranceCompaniesTextBlock_57A04455DAC62D4B16C86CF034084C65" xlink:to="lab_us-gaap_IndustrySpecificPoliciesInsuranceCompaniesTextBlock_57A04455DAC62D4B16C86CF034084C65" xlink:type="arc"/>
<link:label id="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_02C3F11D2275E579DD456CF03408E154_terseLabel_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_02C3F11D2275E579DD456CF03408E154" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> New Accounting Pronouncements, Policy [Policy Text Block] </link:label>
<link:label id="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_02C3F11D2275E579DD456CF03408E154_label_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_02C3F11D2275E579DD456CF03408E154" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> New Accounting Pronouncements, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:label="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_02C3F11D2275E579DD456CF03408E154" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_02C3F11D2275E579DD456CF03408E154" xlink:to="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_02C3F11D2275E579DD456CF03408E154" xlink:type="arc"/>
<link:label id="lab_unh_MedicarePartDPharmacyBenefitsContractAxis_CFFB1167727D450CC0BB8A89F3889A9D_terseLabel_en-US" xlink:label="lab_unh_MedicarePartDPharmacyBenefitsContractAxis_CFFB1167727D450CC0BB8A89F3889A9D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Medicare Part D Pharmacy Benefits Contract [Axis] </link:label>
<link:label id="lab_unh_MedicarePartDPharmacyBenefitsContractAxis_CFFB1167727D450CC0BB8A89F3889A9D_label_en-US" xlink:label="lab_unh_MedicarePartDPharmacyBenefitsContractAxis_CFFB1167727D450CC0BB8A89F3889A9D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Medicare Part D Pharmacy Benefits Contract [Axis] </link:label>
<link:label id="lab_unh_MedicarePartDPharmacyBenefitsContractAxis_CFFB1167727D450CC0BB8A89F3889A9D_documentation_en-US" xlink:label="lab_unh_MedicarePartDPharmacyBenefitsContractAxis_CFFB1167727D450CC0BB8A89F3889A9D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Medicare Part D Pharmacy Benefits Contract [Axis] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_MedicarePartDPharmacyBenefitsContractAxis" xlink:label="loc_unh_MedicarePartDPharmacyBenefitsContractAxis_CFFB1167727D450CC0BB8A89F3889A9D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_MedicarePartDPharmacyBenefitsContractAxis_CFFB1167727D450CC0BB8A89F3889A9D" xlink:to="lab_unh_MedicarePartDPharmacyBenefitsContractAxis_CFFB1167727D450CC0BB8A89F3889A9D" xlink:type="arc"/>
<link:label id="lab_unh_MedicarePartDPharmacyBenefitsContractDomain_9F230F928D0EF994283D8A89F3898E1B_terseLabel_en-US" xlink:label="lab_unh_MedicarePartDPharmacyBenefitsContractDomain_9F230F928D0EF994283D8A89F3898E1B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Medicare Part D Pharmacy Benefits Contract [Domain] </link:label>
<link:label id="lab_unh_MedicarePartDPharmacyBenefitsContractDomain_9F230F928D0EF994283D8A89F3898E1B_label_en-US" xlink:label="lab_unh_MedicarePartDPharmacyBenefitsContractDomain_9F230F928D0EF994283D8A89F3898E1B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Medicare Part D Pharmacy Benefits Contract [Domain] </link:label>
<link:label id="lab_unh_MedicarePartDPharmacyBenefitsContractDomain_9F230F928D0EF994283D8A89F3898E1B_documentation_en-US" xlink:label="lab_unh_MedicarePartDPharmacyBenefitsContractDomain_9F230F928D0EF994283D8A89F3898E1B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Medicare Part D Pharmacy Benefits Contract [Domain] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_MedicarePartDPharmacyBenefitsContractDomain" xlink:label="loc_unh_MedicarePartDPharmacyBenefitsContractDomain_9F230F928D0EF994283D8A89F3898E1B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_MedicarePartDPharmacyBenefitsContractDomain_9F230F928D0EF994283D8A89F3898E1B" xlink:to="lab_unh_MedicarePartDPharmacyBenefitsContractDomain_9F230F928D0EF994283D8A89F3898E1B" xlink:type="arc"/>
<link:label id="lab_unh_MedicarePartDLiabilitiesMember_381FF5DD4A64779FB7E08A89F389F8D6_terseLabel_en-US" xlink:label="lab_unh_MedicarePartDLiabilitiesMember_381FF5DD4A64779FB7E08A89F389F8D6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Medicare Part D Liabilities [Member] </link:label>
<link:label id="lab_unh_MedicarePartDLiabilitiesMember_381FF5DD4A64779FB7E08A89F389F8D6_label_en-US" xlink:label="lab_unh_MedicarePartDLiabilitiesMember_381FF5DD4A64779FB7E08A89F389F8D6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Medicare Part D Liabilities [Member] </link:label>
<link:label id="lab_unh_MedicarePartDLiabilitiesMember_381FF5DD4A64779FB7E08A89F389F8D6_documentation_en-US" xlink:label="lab_unh_MedicarePartDLiabilitiesMember_381FF5DD4A64779FB7E08A89F389F8D6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Medicare Part D Liabilities [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_MedicarePartDLiabilitiesMember" xlink:label="loc_unh_MedicarePartDLiabilitiesMember_381FF5DD4A64779FB7E08A89F389F8D6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_MedicarePartDLiabilitiesMember_381FF5DD4A64779FB7E08A89F389F8D6" xlink:to="lab_unh_MedicarePartDLiabilitiesMember_381FF5DD4A64779FB7E08A89F389F8D6" xlink:type="arc"/>
<link:label id="lab_unh_MedicarePartDPharmacyReceivablesMember_55ED464BBF144B25CEA18A89F389B506_terseLabel_en-US" xlink:label="lab_unh_MedicarePartDPharmacyReceivablesMember_55ED464BBF144B25CEA18A89F389B506" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Medicare Part D Receivables [Member] </link:label>
<link:label id="lab_unh_MedicarePartDPharmacyReceivablesMember_55ED464BBF144B25CEA18A89F389B506_label_en-US" xlink:label="lab_unh_MedicarePartDPharmacyReceivablesMember_55ED464BBF144B25CEA18A89F389B506" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Medicare Part D Pharmacy Receivables [Member] </link:label>
<link:label id="lab_unh_MedicarePartDPharmacyReceivablesMember_55ED464BBF144B25CEA18A89F389B506_documentation_en-US" xlink:label="lab_unh_MedicarePartDPharmacyReceivablesMember_55ED464BBF144B25CEA18A89F389B506" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Medicare Part D Pharmacy Receivables [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_MedicarePartDPharmacyReceivablesMember" xlink:label="loc_unh_MedicarePartDPharmacyReceivablesMember_55ED464BBF144B25CEA18A89F389B506" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_MedicarePartDPharmacyReceivablesMember_55ED464BBF144B25CEA18A89F389B506" xlink:to="lab_unh_MedicarePartDPharmacyReceivablesMember_55ED464BBF144B25CEA18A89F389B506" xlink:type="arc"/>
<link:label id="lab_unh_PharmaceuticalmanufacturerrebatesreceivableAxis_A71BCB9914778C1C5F828A89F389FAFD_terseLabel_en-US" xlink:label="lab_unh_PharmaceuticalmanufacturerrebatesreceivableAxis_A71BCB9914778C1C5F828A89F389FAFD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Pharmaceutical manufacturer rebates receivable [Axis] </link:label>
<link:label id="lab_unh_PharmaceuticalmanufacturerrebatesreceivableAxis_A71BCB9914778C1C5F828A89F389FAFD_label_en-US" xlink:label="lab_unh_PharmaceuticalmanufacturerrebatesreceivableAxis_A71BCB9914778C1C5F828A89F389FAFD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Pharmaceutical manufacturer rebates receivable [Axis] </link:label>
<link:label id="lab_unh_PharmaceuticalmanufacturerrebatesreceivableAxis_A71BCB9914778C1C5F828A89F389FAFD_documentation_en-US" xlink:label="lab_unh_PharmaceuticalmanufacturerrebatesreceivableAxis_A71BCB9914778C1C5F828A89F389FAFD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Pharmaceutical manufacturer rebates receivable </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_PharmaceuticalmanufacturerrebatesreceivableAxis" xlink:label="loc_unh_PharmaceuticalmanufacturerrebatesreceivableAxis_A71BCB9914778C1C5F828A89F389FAFD" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_PharmaceuticalmanufacturerrebatesreceivableAxis_A71BCB9914778C1C5F828A89F389FAFD" xlink:to="lab_unh_PharmaceuticalmanufacturerrebatesreceivableAxis_A71BCB9914778C1C5F828A89F389FAFD" xlink:type="arc"/>
<link:label id="lab_unh_PharmaceuticalmanufacturerrebatesreceivableDomain_4E458861BDA4085764F08A89F3897ECE_terseLabel_en-US" xlink:label="lab_unh_PharmaceuticalmanufacturerrebatesreceivableDomain_4E458861BDA4085764F08A89F3897ECE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Pharmaceutical manufacturer rebates receivable [Domain] </link:label>
<link:label id="lab_unh_PharmaceuticalmanufacturerrebatesreceivableDomain_4E458861BDA4085764F08A89F3897ECE_label_en-US" xlink:label="lab_unh_PharmaceuticalmanufacturerrebatesreceivableDomain_4E458861BDA4085764F08A89F3897ECE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Pharmaceutical manufacturer rebates receivable [Domain] </link:label>
<link:label id="lab_unh_PharmaceuticalmanufacturerrebatesreceivableDomain_4E458861BDA4085764F08A89F3897ECE_documentation_en-US" xlink:label="lab_unh_PharmaceuticalmanufacturerrebatesreceivableDomain_4E458861BDA4085764F08A89F3897ECE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> [Domain] for Pharmaceutical manufacturer rebates receivable </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_PharmaceuticalmanufacturerrebatesreceivableDomain" xlink:label="loc_unh_PharmaceuticalmanufacturerrebatesreceivableDomain_4E458861BDA4085764F08A89F3897ECE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_PharmaceuticalmanufacturerrebatesreceivableDomain_4E458861BDA4085764F08A89F3897ECE" xlink:to="lab_unh_PharmaceuticalmanufacturerrebatesreceivableDomain_4E458861BDA4085764F08A89F3897ECE" xlink:type="arc"/>
<link:label id="lab_unh_PharmaceuticalManufacturerRebatesReceivableMember_491BC57CB2C97558C8268A89F389FCDA_terseLabel_en-US" xlink:label="lab_unh_PharmaceuticalManufacturerRebatesReceivableMember_491BC57CB2C97558C8268A89F389FCDA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Pharmaceutical Manufacturer Rebates Receivable [Member] </link:label>
<link:label id="lab_unh_PharmaceuticalManufacturerRebatesReceivableMember_491BC57CB2C97558C8268A89F389FCDA_label_en-US" xlink:label="lab_unh_PharmaceuticalManufacturerRebatesReceivableMember_491BC57CB2C97558C8268A89F389FCDA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> PharmaceuticalManufacturerRebatesReceivable [Member] </link:label>
<link:label id="lab_unh_PharmaceuticalManufacturerRebatesReceivableMember_491BC57CB2C97558C8268A89F389FCDA_documentation_en-US" xlink:label="lab_unh_PharmaceuticalManufacturerRebatesReceivableMember_491BC57CB2C97558C8268A89F389FCDA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> PharmaceuticalManufacturerRebatesReceivable [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_PharmaceuticalManufacturerRebatesReceivableMember" xlink:label="loc_unh_PharmaceuticalManufacturerRebatesReceivableMember_491BC57CB2C97558C8268A89F389FCDA" xlink:type="locator"/>
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<link:label id="lab_unh_ProductsandservicesMember_88FA792B5E2E61A0A3AB8A89F38A2914_terseLabel_en-US" xlink:label="lab_unh_ProductsandservicesMember_88FA792B5E2E61A0A3AB8A89F38A2914" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Products and services [Member] </link:label>
<link:label id="lab_unh_ProductsandservicesMember_88FA792B5E2E61A0A3AB8A89F38A2914_label_en-US" xlink:label="lab_unh_ProductsandservicesMember_88FA792B5E2E61A0A3AB8A89F38A2914" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Products and services [Member] </link:label>
<link:label id="lab_unh_ProductsandservicesMember_88FA792B5E2E61A0A3AB8A89F38A2914_documentation_en-US" xlink:label="lab_unh_ProductsandservicesMember_88FA792B5E2E61A0A3AB8A89F38A2914" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Products and services [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_ProductsandservicesMember" xlink:label="loc_unh_ProductsandservicesMember_88FA792B5E2E61A0A3AB8A89F38A2914" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_ProductsandservicesMember_88FA792B5E2E61A0A3AB8A89F38A2914" xlink:to="lab_unh_ProductsandservicesMember_88FA792B5E2E61A0A3AB8A89F38A2914" xlink:type="arc"/>
<link:label id="lab_us-gaap_AccountingStandardsUpdate201409Member_5CE884268CE482497E098A89F38AD342_terseLabel_en-US" xlink:label="lab_us-gaap_AccountingStandardsUpdate201409Member_5CE884268CE482497E098A89F38AD342" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accounting Standards Update 2014-09 [Member] </link:label>
<link:label id="lab_us-gaap_AccountingStandardsUpdate201409Member_5CE884268CE482497E098A89F38AD342_label_en-US" xlink:label="lab_us-gaap_AccountingStandardsUpdate201409Member_5CE884268CE482497E098A89F38AD342" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accounting Standards Update 2014-09 [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountingStandardsUpdate201409Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201409Member_5CE884268CE482497E098A89F38AD342" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AccountingStandardsUpdate201601Member_102ABA7F67D03C8FF9548A89F38A8F68_terseLabel_en-US" xlink:label="lab_us-gaap_AccountingStandardsUpdate201601Member_102ABA7F67D03C8FF9548A89F38A8F68" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accounting Standards Update 2016-01 [Member] </link:label>
<link:label id="lab_us-gaap_AccountingStandardsUpdate201601Member_102ABA7F67D03C8FF9548A89F38A8F68_label_en-US" xlink:label="lab_us-gaap_AccountingStandardsUpdate201601Member_102ABA7F67D03C8FF9548A89F38A8F68" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accounting Standards Update 2016-01 [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountingStandardsUpdate201601Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201601Member_102ABA7F67D03C8FF9548A89F38A8F68" xlink:type="locator"/>
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<link:label id="lab_us-gaap_RestrictedStockMember_DF93C684739F59F1F95D8A89F38A418E_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedStockMember_DF93C684739F59F1F95D8A89F38A418E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Restricted Stock [Member] </link:label>
<link:label id="lab_us-gaap_RestrictedStockMember_DF93C684739F59F1F95D8A89F38A418E_label_en-US" xlink:label="lab_us-gaap_RestrictedStockMember_DF93C684739F59F1F95D8A89F38A418E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Restricted Stock [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="loc_us-gaap_RestrictedStockMember_DF93C684739F59F1F95D8A89F38A418E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestrictedStockMember_DF93C684739F59F1F95D8A89F38A418E" xlink:to="lab_us-gaap_RestrictedStockMember_DF93C684739F59F1F95D8A89F38A418E" xlink:type="arc"/>
<link:label id="lab_unh_StockOptionsAndSarsMemberMember_7212C30044020A27979A8A89F38ABD00_terseLabel_en-US" xlink:label="lab_unh_StockOptionsAndSarsMemberMember_7212C30044020A27979A8A89F38ABD00" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Stock Options and SARs [Member] [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_StockOptionsAndSarsMemberMember" xlink:label="loc_unh_StockOptionsAndSarsMemberMember_7212C30044020A27979A8A89F38ABD00" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_StockOptionsAndSarsMemberMember_7212C30044020A27979A8A89F38ABD00" xlink:to="lab_unh_StockOptionsAndSarsMemberMember_7212C30044020A27979A8A89F38ABD00" xlink:type="arc"/>
<link:label id="lab_us-gaap_OtherReceivablesNetCurrent_18C55CC983998E08B6538A89F38C2AA8_terseLabel_en-US" xlink:label="lab_us-gaap_OtherReceivablesNetCurrent_18C55CC983998E08B6538A89F38C2AA8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other current receivables </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherReceivablesNetCurrent" xlink:label="loc_us-gaap_OtherReceivablesNetCurrent_18C55CC983998E08B6538A89F38C2AA8" xlink:type="locator"/>
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<link:label id="lab_us-gaap_GoodwillImpairmentLoss_2A2A769B2F9CAC53F4AE8A89F38CDF19_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillImpairmentLoss_2A2A769B2F9CAC53F4AE8A89F38CDF19" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Goodwill, Impairment Loss </link:label>
<link:label id="lab_us-gaap_GoodwillImpairmentLoss_2A2A769B2F9CAC53F4AE8A89F38CDF19_label_en-US" xlink:label="lab_us-gaap_GoodwillImpairmentLoss_2A2A769B2F9CAC53F4AE8A89F38CDF19" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Goodwill, Impairment Loss </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillImpairmentLoss" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_2A2A769B2F9CAC53F4AE8A89F38CDF19" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_BFA64B53BE19CF9BE46E8A89F38C96F9_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_BFA64B53BE19CF9BE46E8A89F38C96F9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Impairment of Intangible Assets (Excluding Goodwill) </link:label>
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<link:label id="lab_unh_NumberOfDaysNoticeRequiredToCancelHealthInsuranceContract_57B901B5C799FBA3A2B28A89F38CE364_terseLabel_en-US" xlink:label="lab_unh_NumberOfDaysNoticeRequiredToCancelHealthInsuranceContract_57B901B5C799FBA3A2B28A89F38CE364" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Number Of Days Notice Required To Cancel Health Insurance Contract </link:label>
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<link:loc xlink:href="unh-20171231.xsd#unh_NumberOfDaysNoticeRequiredToCancelHealthInsuranceContract" xlink:label="loc_unh_NumberOfDaysNoticeRequiredToCancelHealthInsuranceContract_57B901B5C799FBA3A2B28A89F38CE364" xlink:type="locator"/>
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<link:label id="lab_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleDescriptionOfTransitionMethod_B07968074998B010C8E28A89F38C66A8_terseLabel_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleDescriptionOfTransitionMethod_B07968074998B010C8E28A89F38C66A8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> New Accounting Pronouncement or Change in Accounting Principle, Description of Transition Method </link:label>
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<link:label id="lab_us-gaap_LongTermDebtMember_CF45A34FB16897EFEDA66CFCE5702575_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtMember_CF45A34FB16897EFEDA66CFCE5702575" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term Debt [Member] </link:label>
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<link:label id="lab_us-gaap_DebtSecurityAxis_DF93F0DE11D5A84E01186CFCE57059B8_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecurityAxis_DF93F0DE11D5A84E01186CFCE57059B8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt Security [Axis] </link:label>
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<link:label id="lab_us-gaap_FairValueInputsLevel1Member_63267283EADDF5A323FB6CFCE5716C14_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member_63267283EADDF5A323FB6CFCE5716C14" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Quoted Prices in Active Markets (Level 1) [Member] </link:label>
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<link:label id="lab_us-gaap_FairValueInputsLevel2Member_8F472615AF8B01F53D296CFCE571670B_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel2Member_8F472615AF8B01F53D296CFCE571670B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other Observable Inputs (Level 2) [Member] </link:label>
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<link:label id="lab_us-gaap_EquityMethodInvestments_2E577AFB515A5D49B947576F5521B33E_terseLabel_en-US" xlink:label="lab_us-gaap_EquityMethodInvestments_2E577AFB515A5D49B947576F5521B33E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Equity Method Investments </link:label>
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<link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_B74E300E4E21DBC1EC3C50C3F93C2E36_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_B74E300E4E21DBC1EC3C50C3F93C2E36" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment </link:label>
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<link:label id="lab_unh_ShareRepurchasesTable_993C55C66B9F579DA8E46CEBB59866BE_terseLabel_en-US" xlink:label="lab_unh_ShareRepurchasesTable_993C55C66B9F579DA8E46CEBB59866BE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Share Repurchases [Table] </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequired" xlink:label="loc_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequired_32FEB6F0C08F471381596CEBB5996120" xlink:type="locator"/>
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<link:label id="lab_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_7BB4B147E686DD948E7A6CEBB599B6D3_terseLabel_en-US" xlink:label="lab_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_7BB4B147E686DD948E7A6CEBB599B6D3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Stock Repurchase Program, Number of Shares Authorized to be Repurchased </link:label>
<link:label id="lab_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_7BB4B147E686DD948E7A6CEBB599B6D3_label_en-US" xlink:label="lab_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_7BB4B147E686DD948E7A6CEBB599B6D3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stock Repurchase Program, Number of Shares Authorized to be Repurchased </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased" xlink:label="loc_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_7BB4B147E686DD948E7A6CEBB599B6D3" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_BBAD01E7870DB3F16E0650C3F9A0D5BD_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_BBAD01E7870DB3F16E0650C3F9A0D5BD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of Quarterly Financial Information [Table Text Block] </link:label>
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<link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_73B6BEE08553AD63214F66D312BD4134_verboseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_73B6BEE08553AD63214F66D312BD4134" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Fair Value Hierarchy [Domain] </link:label>
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<link:label id="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_E024CE42FD9DB8E452B466D312BFC48A_verboseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_E024CE42FD9DB8E452B466D312BFC48A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Cash and cash equivalents </link:label>
<link:label id="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_E024CE42FD9DB8E452B466D312BFC48A_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_E024CE42FD9DB8E452B466D312BFC48A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Cash and Cash Equivalents, Fair Value Disclosure </link:label>
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<link:label id="lab_us-gaap_AssetsFairValueDisclosureRecurring_79649A171D051FFFC75E66D312BF5680_label_en-US" xlink:label="lab_us-gaap_AssetsFairValueDisclosureRecurring_79649A171D051FFFC75E66D312BF5680" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Assets, Fair Value Disclosure, Recurring </link:label>
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<link:label id="lab_us-gaap_StatementOfStockholdersEquityAbstract_DC7B859B68E88A7AB1E650C3FA66B5C9_label_en-US" xlink:label="lab_us-gaap_StatementOfStockholdersEquityAbstract_DC7B859B68E88A7AB1E650C3FA66B5C9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Statement of Stockholders' Equity [Abstract] </link:label>
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<link:label id="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_1B97DD7C9B9340C2FE4350C3FA6655E8_terseLabel_en-US" xlink:label="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_1B97DD7C9B9340C2FE4350C3FA6655E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Common shares repurchases, shares </link:label>
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<link:label id="lab_us-gaap_LossContingenciesTable_7DA829575A589AD4A94676976427849B_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingenciesTable_7DA829575A589AD4A94676976427849B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Loss Contingencies [Table] </link:label>
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<link:label id="lab_us-gaap_LossContingenciesByNatureOfContingencyAxis_595EA8B1646D031962DE769764357B53_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingenciesByNatureOfContingencyAxis_595EA8B1646D031962DE769764357B53" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Loss Contingency Nature [Axis] </link:label>
<link:label id="lab_us-gaap_LossContingenciesByNatureOfContingencyAxis_595EA8B1646D031962DE769764357B53_label_en-US" xlink:label="lab_us-gaap_LossContingenciesByNatureOfContingencyAxis_595EA8B1646D031962DE769764357B53" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Loss Contingency Nature [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_595EA8B1646D031962DE769764357B53" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_595EA8B1646D031962DE769764357B53" xlink:to="lab_us-gaap_LossContingenciesByNatureOfContingencyAxis_595EA8B1646D031962DE769764357B53" xlink:type="arc"/>
<link:label id="lab_us-gaap_LossContingencyNatureDomain_BC90D89B4AC9FFC0856176976435D53D_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingencyNatureDomain_BC90D89B4AC9FFC0856176976435D53D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Loss Contingency, Nature [Domain] </link:label>
<link:label id="lab_us-gaap_LossContingencyNatureDomain_BC90D89B4AC9FFC0856176976435D53D_label_en-US" xlink:label="lab_us-gaap_LossContingencyNatureDomain_BC90D89B4AC9FFC0856176976435D53D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Loss Contingency, Nature [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LossContingencyNatureDomain" xlink:label="loc_us-gaap_LossContingencyNatureDomain_BC90D89B4AC9FFC0856176976435D53D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingencyNatureDomain_BC90D89B4AC9FFC0856176976435D53D" xlink:to="lab_us-gaap_LossContingencyNatureDomain_BC90D89B4AC9FFC0856176976435D53D" xlink:type="arc"/>
<link:label id="lab_us-gaap_LossContingenciesLineItems_A22AFA491D999683BEFB76976435E2B3_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingenciesLineItems_A22AFA491D999683BEFB76976435E2B3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Loss Contingencies [Line Items] </link:label>
<link:label id="lab_us-gaap_LossContingenciesLineItems_A22AFA491D999683BEFB76976435E2B3_label_en-US" xlink:label="lab_us-gaap_LossContingenciesLineItems_A22AFA491D999683BEFB76976435E2B3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Loss Contingencies [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:label="loc_us-gaap_LossContingenciesLineItems_A22AFA491D999683BEFB76976435E2B3" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingenciesLineItems_A22AFA491D999683BEFB76976435E2B3" xlink:to="lab_us-gaap_LossContingenciesLineItems_A22AFA491D999683BEFB76976435E2B3" xlink:type="arc"/>
<link:label id="lab_unh_UndrawnLettersOfCredit_A6CCF4E41903A633982C76976436E604_terseLabel_en-US" xlink:label="lab_unh_UndrawnLettersOfCredit_A6CCF4E41903A633982C76976436E604" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Undrawn Letters Of Credit </link:label>
<link:label id="lab_unh_UndrawnLettersOfCredit_A6CCF4E41903A633982C76976436E604_label_en-US" xlink:label="lab_unh_UndrawnLettersOfCredit_A6CCF4E41903A633982C76976436E604" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Undrawn Letters Of Credit </link:label>
<link:label id="lab_unh_UndrawnLettersOfCredit_A6CCF4E41903A633982C76976436E604_documentation_en-US" xlink:label="lab_unh_UndrawnLettersOfCredit_A6CCF4E41903A633982C76976436E604" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Amount of undrawn letters of credit that are available to bond contractual performance. </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_UndrawnLettersOfCredit" xlink:label="loc_unh_UndrawnLettersOfCredit_A6CCF4E41903A633982C76976436E604" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_UndrawnLettersOfCredit_A6CCF4E41903A633982C76976436E604" xlink:to="lab_unh_UndrawnLettersOfCredit_A6CCF4E41903A633982C76976436E604" xlink:type="arc"/>
<link:label id="lab_us-gaap_LeaseAndRentalExpense_A5CE103C74857C2A880C76976436D355_terseLabel_en-US" xlink:label="lab_us-gaap_LeaseAndRentalExpense_A5CE103C74857C2A880C76976436D355" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Operating Leases, Rent Expense </link:label>
<link:label id="lab_us-gaap_LeaseAndRentalExpense_A5CE103C74857C2A880C76976436D355_label_en-US" xlink:label="lab_us-gaap_LeaseAndRentalExpense_A5CE103C74857C2A880C76976436D355" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Rent Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LeaseAndRentalExpense" xlink:label="loc_us-gaap_LeaseAndRentalExpense_A5CE103C74857C2A880C76976436D355" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LeaseAndRentalExpense_A5CE103C74857C2A880C76976436D355" xlink:to="lab_us-gaap_LeaseAndRentalExpense_A5CE103C74857C2A880C76976436D355" xlink:type="arc"/>
<link:label id="lab_unh_SuretyBondsOutstanding_9CB56E13B6589A212AB076976436746A_terseLabel_en-US" xlink:label="lab_unh_SuretyBondsOutstanding_9CB56E13B6589A212AB076976436746A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Surety Bonds Outstanding </link:label>
<link:label id="lab_unh_SuretyBondsOutstanding_9CB56E13B6589A212AB076976436746A_label_en-US" xlink:label="lab_unh_SuretyBondsOutstanding_9CB56E13B6589A212AB076976436746A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Surety Bonds Outstanding </link:label>
<link:label id="lab_unh_SuretyBondsOutstanding_9CB56E13B6589A212AB076976436746A_documentation_en-US" xlink:label="lab_unh_SuretyBondsOutstanding_9CB56E13B6589A212AB076976436746A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Surety Bonds Outstanding </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_SuretyBondsOutstanding" xlink:label="loc_unh_SuretyBondsOutstanding_9CB56E13B6589A212AB076976436746A" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_SuretyBondsOutstanding_9CB56E13B6589A212AB076976436746A" xlink:to="lab_unh_SuretyBondsOutstanding_9CB56E13B6589A212AB076976436746A" xlink:type="arc"/>
<link:label id="lab_unh_PaymentstobemadetoAcquireBusinessesGross_8B84B6AD2112BF621C77769764364176_terseLabel_en-US" xlink:label="lab_unh_PaymentstobemadetoAcquireBusinessesGross_8B84B6AD2112BF621C77769764364176" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Payments to be made to Acquire Businesses, Gross </link:label>
<link:label id="lab_unh_PaymentstobemadetoAcquireBusinessesGross_8B84B6AD2112BF621C77769764364176_label_en-US" xlink:label="lab_unh_PaymentstobemadetoAcquireBusinessesGross_8B84B6AD2112BF621C77769764364176" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments to be made to Acquire Businesses, Gross </link:label>
<link:label id="lab_unh_PaymentstobemadetoAcquireBusinessesGross_8B84B6AD2112BF621C77769764364176_documentation_en-US" xlink:label="lab_unh_PaymentstobemadetoAcquireBusinessesGross_8B84B6AD2112BF621C77769764364176" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> The cash outflow associated with announced acquisitions of businesses during the period that have not yet been completed. The cash portion only of the acquisition price. </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_PaymentstobemadetoAcquireBusinessesGross" xlink:label="loc_unh_PaymentstobemadetoAcquireBusinessesGross_8B84B6AD2112BF621C77769764364176" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unh_PaymentstobemadetoAcquireBusinessesGross_8B84B6AD2112BF621C77769764364176" xlink:to="lab_unh_PaymentstobemadetoAcquireBusinessesGross_8B84B6AD2112BF621C77769764364176" xlink:type="arc"/>
<link:label id="lab_us-gaap_FurnitureAndFixturesMember_2E83725399F060A60F7C538EB2E86B13_terseLabel_en-US" xlink:label="lab_us-gaap_FurnitureAndFixturesMember_2E83725399F060A60F7C538EB2E86B13" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Furniture, Fixtures and equipment [Member] </link:label>
<link:label id="lab_us-gaap_FurnitureAndFixturesMember_2E83725399F060A60F7C538EB2E86B13_label_en-US" xlink:label="lab_us-gaap_FurnitureAndFixturesMember_2E83725399F060A60F7C538EB2E86B13" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Furniture and Fixtures [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_2E83725399F060A60F7C538EB2E86B13" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FurnitureAndFixturesMember_2E83725399F060A60F7C538EB2E86B13" xlink:to="lab_us-gaap_FurnitureAndFixturesMember_2E83725399F060A60F7C538EB2E86B13" xlink:type="arc"/>
<link:label id="lab_us-gaap_BuildingMember_E439279F814AA99C2AD0538EB2E84621_terseLabel_en-US" xlink:label="lab_us-gaap_BuildingMember_E439279F814AA99C2AD0538EB2E84621" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Buildings [Member] </link:label>
<link:label id="lab_us-gaap_BuildingMember_E439279F814AA99C2AD0538EB2E84621_label_en-US" xlink:label="lab_us-gaap_BuildingMember_E439279F814AA99C2AD0538EB2E84621" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Building [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BuildingMember" xlink:label="loc_us-gaap_BuildingMember_E439279F814AA99C2AD0538EB2E84621" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BuildingMember_E439279F814AA99C2AD0538EB2E84621" xlink:to="lab_us-gaap_BuildingMember_E439279F814AA99C2AD0538EB2E84621" xlink:type="arc"/>
<link:label id="lab_unh_CapitalizedsoftwareMember_B4B5ECD2AC7F2FE6E4BB538EB2E824EE_terseLabel_en-US" xlink:label="lab_unh_CapitalizedsoftwareMember_B4B5ECD2AC7F2FE6E4BB538EB2E824EE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Capitalized software [Member] </link:label>
<link:label id="lab_unh_CapitalizedsoftwareMember_B4B5ECD2AC7F2FE6E4BB538EB2E824EE_label_en-US" xlink:label="lab_unh_CapitalizedsoftwareMember_B4B5ECD2AC7F2FE6E4BB538EB2E824EE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capitalized software [Member] </link:label>
<link:label id="lab_unh_CapitalizedsoftwareMember_B4B5ECD2AC7F2FE6E4BB538EB2E824EE_documentation_en-US" xlink:label="lab_unh_CapitalizedsoftwareMember_B4B5ECD2AC7F2FE6E4BB538EB2E824EE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Capitalized software [Member] </link:label>
<link:loc xlink:href="unh-20171231.xsd#unh_CapitalizedsoftwareMember" xlink:label="loc_unh_CapitalizedsoftwareMember_B4B5ECD2AC7F2FE6E4BB538EB2E824EE" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_6C51074E9D3DEA9CDAF3538EB2E8DC9C_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_6C51074E9D3DEA9CDAF3538EB2E8DC9C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Useful Life </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_6C51074E9D3DEA9CDAF3538EB2E8DC9C_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_6C51074E9D3DEA9CDAF3538EB2E8DC9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Useful Life </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_6C51074E9D3DEA9CDAF3538EB2E8DC9C" xlink:type="locator"/>
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<link:label id="lab_us-gaap_SegmentReportingDisclosureTextBlock_82D11837D61F15F9D9A850C3FADCEBEF_verboseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingDisclosureTextBlock_82D11837D61F15F9D9A850C3FADCEBEF" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Segment Financial Information [Text Block] </link:label>
<link:label id="lab_us-gaap_SegmentReportingDisclosureTextBlock_82D11837D61F15F9D9A850C3FADCEBEF_label_en-US" xlink:label="lab_us-gaap_SegmentReportingDisclosureTextBlock_82D11837D61F15F9D9A850C3FADCEBEF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Segment Reporting Disclosure [Text Block] </link:label>
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2 Subsequent Filings that Reference this Filing

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 4/11/18  SEC                               UPLOAD5/09/18    1:38K  UnitedHealth Group Inc.
 3/22/18  SEC                               UPLOAD5/09/18    1:47K  UnitedHealth Group Inc.
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