FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   O'Brien Timothy John 2. Date of Event Requiring Statement (Month/Day/Year) 01/01/2016 3. Issuer Name and Ticker or Trading Symbol ATHENAHEALTH INC [ATHN] (Last) (First) (Middle) C/O ATHENAHEALTH, INC., 311 ARSENAL ST. 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) SVP, Chief Marketing Officer 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) WATERTOWN, MA 02472 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	  (1)	01/01/2021	Common Stock	375	$ 41.71	D	Â
Restricted Stock Unit	  (2)	02/01/2016	Common Stock	1,250	$ (3)	D	Â
Restricted Stock Unit	  (4)	03/01/2016	Common Stock	62	$ (3)	D	Â
Restricted Stock Unit	  (5)	08/01/2016	Common Stock	625	$ (3)	D	Â
Restricted Stock Unit	  (6)	03/01/2017	Common Stock	501	$ (3)	D	Â
Restricted Stock Unit	  (7)	03/01/2018	Common Stock	636	$ (3)	D	Â
Restricted Stock Unit	  (8)	03/01/2019	Common Stock	898	$ (3)	D	Â
Restricted Stock Unit	  (9)	03/01/2019	Common Stock	2,000	$ (3)	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
O'Brien Timothy John C/O ATHENAHEALTH, INC. 311 ARSENAL ST. WATERTOWN, MA 02472	Â	Â	  SVP, Chief Marketing Officer	Â

Signatures

/s/ Lan Marinelli, Attorney-in-Fact		01/06/2016
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	On January 3, 2011, the Reporting Person was granted 1,500 stock options. The stock options vest in four equal annual installments beginning on January 1, 2012.
(2)	On February 1, 2012, the Reporting Person was granted 5,000 restricted stock units. The restricted stock units vest in four equal annual installments beginning on February 1, 2013.
(3)	Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.
(4)	On March 1, 2012, the Reporting Person was granted 250 restricted stock units. The restricted stock units vest in four equal annual installments beginning on March 1, 2013.
(5)	On August 1, 2012, the Reporting Person was granted 2,500 restricted stock units. The restricted stock units vest in four equal annual installments beginning on August 1, 2013.
(6)	On March 1, 2013, the Reporting Person was granted 1,003 restricted stock units. The restricted stock units vest in four equal annual installments beginning on March 1, 2014.
(7)	On March 3, 2014, the Reporting Person was granted 849 restricted stock units. The restricted stock units vest in four equal annual installments beginning on March 1, 2015.
(8)	On March 2, 2015, the Reporting Person was granted 898 restricted stock units. The restricted stock units vest in four equal annual installments beginning on March 1, 2016.
(9)	On March 2, 2015, the Reporting Person was granted 2,000 restricted stock units. The restricted stock units vest in four equal annual installments beginning on March 1, 2016.

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