CMS has posted FY 2011 statistics on the Medicare Fee-for-Service Recovery Audit Contractor (RAC) program, under which CMS contractors are tasked with detecting and correcting past improper Medicare payments. From October 2010 through September 2011, CMS states that RACs have corrected $939.4 million in total payments, the bulk of which ($797.4 million) were recoupments of alleged overpayments. Top overpayment issues identified by the RACs include undocumented medical necessity for renal and urinary tract disorders, surgical cardiovascular procedures, and acute inpatient admissions for neurological disorders, along with the medical necessity of minor surgery and other treatment billed as inpatient care.