ATHENAHEALTH, INC. ANNOUNCES PRICING OF INITIAL PUBLIC OFFERING

WATERTOWN, Mass. (September 19, 2007) – athenahealth, Inc. (Nasdaq:ATHN), today announced the pricing of its initial public offering of 6,286,819 shares of its common stock at a price to the public of $18.00 per share. The 6,286,819 shares to be sold in the offering consist of 5,000,000 shares to be sold by the Company and 1,286,819 shares to be sold by certain stockholders. The Company’s shares are scheduled to begin trading on the NASDAQ Global Market on September 20, 2007 under the trading symbol “ATHN.” The Company intends to use the net proceeds of the offering to repay outstanding debt and for working capital and other general corporate purposes. The Company will not receive any of the proceeds from the sale of common stock held by the selling stockholders. The selling stockholders have granted the underwriters a 30-day option to purchase up to an additional 943,023 shares at the initial public offering price.

Goldman, Sachs & Co. and Merrill Lynch & Co. acted as joint book runners for the offering. Piper Jaffray & Co. and Jefferies & Company, Inc. acted as co-managers.

A copy of the prospectus related to this offering may be obtained from:

Goldman, Sachs & Co.
Attention: Prospectus Department
85 Broad Street
New York, New York 10004
via email at prospectus-ny@ny.email.gs.com
via fax: (212)-902-9316

Merrill Lynch & Co.
Attention: Prospectus Department
4 World Financial Center
New York, New York 10080

A registration statement relating to these securities was declared effective by the Securities and Exchange Commission on September 19, 2007. This press release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of these securities, in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

Contact:
athenahealth
John Hallock
617-504-0958
jhallock@athenahealth.com

Source: ATHENAHEALTH