FORM 6-K


SECURITIES AND EXCHANGE COMMISSION


Washington, D.C. 20549


Report of Foreign Private Issuer
Pursuant to Rule 13a-16 under
the Securities Exchange Act of 1934


For the month ended December, 2009


ICON plc
(Registrant's name)


0-29714
(Commission file number)


South County Business Park, Leopardstown, Dublin 18, Ireland
(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

              Yes___X___                                   No_______

Indicate by check mark whether the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

              Yes______                                    No___X___

Indicate by check mark whether the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

              Yes______                                    No___X___

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

              Yes_______                                   No___X___

If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b):82      N/A

EXHIBIT LIST

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Exhibit 99.1

ICON Receives Warning Letter Relating to Two Studies

DUBLIN--(BUSINESS WIRE)--December 4, 2009--ICON plc, (NASDAQ:ICLR) (ISIN:IE0005711209), today announced it has received a warning letter from the U.S. Food and Drug Administration (FDA) regarding clinical study management services provided by the company to one of its clients in relation to two studies conducted between 2004 and 2006. These studies related to the development of an antibiotic for the treatment of complicated skin and skin-structure infections. The FDA letter arises from its inspections of the company’s client and selected clinical sites and follows a similar letter issued to that client.

ICON is committed to working cooperatively and expeditiously with the FDA to address the matters raised in the letter.

About ICON plc

ICON plc is a global provider of outsourced development services to the pharmaceutical, biotechnology and medical device industries. The Company specialises in the strategic development, management and analysis of programs that support clinical development - from compound selection to Phase I-IV clinical studies. ICON currently has about 7,000 employees, operating from 68 locations in 38 countries.

Further information is available at www.iconplc.com

ICON/ICLR-F

CONTACT:
ICON plc
Niamh Murphy, Corporate Communications
Tel: + 353 –1-291-2180