We consent
to the use in this Amendment No. 3 to Registration Statement No.
333-143998 of our report
dated
June 22, 2007 (which report expresses an unqualified opinion and includes an
explanatory paragraph referring to
the Company’s adoption of Statement of Financial
Accounting Standards No. 123 (Revised),
Share-Based Payment, and Financial Accounting
Standards Board (
“FASB”) Staff Position No. 150-5,
Issuer’s Accounting under FASB Statement
No. 150 for Freestanding Warrants and Other Similar Instruments on Shares that are Redeemable,
effective
January 1, 2006) relating to the consolidated financial statements of athenahealth, Inc.
and subsidiary appearing in the Prospectus, which is a part of such
Registration Statement and to the reference to us under the headings
“Experts” and
“Selected
Consolidated Financial Data” in such Prospectus.
