NEW YORK - Team Health Holdings Inc, a hospital staffing company owned by a unit of private equity firm Blackstone Group, has filed to raise as much as $100 million in an initial public offering.

Knoxville, Tennessee-based Team Health, 92 percent owned by funds affiliated with Blackstone, provides staffing and other administrative service to 550 U.S. hospitals, according to a prospectus filed on Tuesday with the U.S. Securities and Exchange Commission.

Team Health revenue rose 6.9 percent to $711.7 million in the first six months of 2009, with net income totaling $41.7 million. (Reporting by Phil Wahba; editing by John Wallace)