The “Fast 50” looks beyond revenue growth and profit margins to single out creative models and progressive cultures that influence the many forms of innovation that exist in the business world today. As a Fast 50 company, athenahealth has been recognized alongside innovators such as Apple, Nike, IBM and Disney as well as Google, Amazon, Microsoft, and Facebook.

“The great appeal of athenahealth to our athenistas and many in the healthcare community is our focus on pushing the boundaries of what is possible in healthcare IT, and in doing so driving innovation throughout the industry to enable better delivery of care,” said Jonathan Bush, athenahealth’s Chairman and CEO. “Fast Company’srecognition of what athenahealth would coin our ‘missionary work’ in bringing the gospel of cloud computing to healthcare is gratifying, and we are flattered to be acknowledged amongst Fast 50 peers that are world-renowned for rewriting the rules for positive change in their own industries.”

To create the 2010 Most Innovative Companies issue, Fast Companydeployed its editorial team around the globe to gather data and interview experts and business leaders in every industry to get their nominations. The final 50 were selected from a list of 250 finalist companies, including more than 75 non-U.S. businesses. Actual rankings were determined by vote by a panel of editors and writers.

The complete Fast 50 list and related stories appear in the March 2010 issue of Fast Company magazine, on newsstands currently and online at www.fastcompany.com/MIC.

About athenahealth

athenahealth, Inc. is a leading provider of Internet-based business services for physician practices. athenahealth’s service offerings are based on proprietary web-native practice management and electronic health record (EHR) software, a continuously updated payer knowledge-base, integrated back-office service operations, and automated and live patient communication services. For more information, please visit www.athenahealth.com or call (888) 652-8200.

This press release contains forward-looking statements, which are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, including statements regarding the anticipated benefits of the athenahealth’s service offerings. These statements are neither promises nor guarantees, and are subject to a variety of risks and uncertainties, many of which are beyond our control, which could cause actual results to differ materially from those contemplated in these forward-looking statements. In particular, the risks and uncertainties include, among other things: the risk that our service offerings will not operate in the manner that we expect due to design flaws, security breaches, or otherwise; potential interruptions or delays in our internet-based service offerings; our reliance upon third parties, such as computer hardware, software, data-hosting, and internet infrastructure providers, which reliance may result in failures or disruptions in our service offerings; errors or omissions included in our payer and clinical intelligence rules engine and database; and the evolving and complex government regulatory compliance environment in which we and our clients operate. Existing and prospective investors are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. athenahealth, Inc. undertakes no obligation to update or revise the information contained in this press release, whether as a result of new information, future events or circumstances, or otherwise. For additional disclosure regarding these and other risks faced by athenahealth, Inc., please see the disclosure contained in our public filings with the Securities and Exchange Commission, available on the Investors section of our website at www.athenahealth.com and on the SEC's website at www.sec.gov.

athenahealth, Inc.
John Hallock (Media), 617-504-0958
Director, Corporate Communications
media@athenahealth.com
or
athenahealth, Inc.
Jennifer Heizer (Investors), 617-402-1322
Director, Investor Relations
investorrelations@athenahealth.com