A managed care company says government officials are expressing an interest in its employee stock option program.

UnitedHealth Group Inc., Minnetonka, Minn., says it has received a subpoena from the office of the U.S. attorney for the Southern District of New York requesting documents about the topic from 1999 to the present.

The Internal Revenue Service has asked for documents about the stock options given to executives and other executive compensation from 2003 to the present, UnitedHealth says.

“The company will cooperate fully with both offices,” UnitedHealth says.

The company now includes a note with its press releases warning that results of the investigations of stock option granting practices could affect the company’s future performance.