The District agency charged with overseeing the city’s disability compensation program paid a subcontractor thousands of dollars for services included in another government contract, a new audit reveals.

The D.C. Office of the Inspector General analyzed 32 charges paid by the Office of Risk Management to Wayne, Pa.-based Genex Services Inc. for nurse case management. The auditor found a staggering 91 percent — 29 of the 32 billings paid between July 1, 2005, and June 30, 2006 — were for services already covered under a three-year, $9.4 million deal with CompManagement of Virginia Inc., the day-to-day manager of the workers’ compensation program.