The OIG has issued a report entitled, “Most Power Wheelchairs in the Medicare Program Did Not Meet Medical Necessity Guidelines,” which found that 61% of Medicare power wheelchair claims in the first half of 2007 were medically unnecessary or lacked sufficient documentation to determine medical necessity. The OIG recommends that CMS: (1) enhance reenrollment screening standards for current DMEPOS suppliers; (2) review records from the prescribing physician or other sources to determine medical necessity; (3) continue to educate suppliers and prescribing physicians on clinical coverage criteria; and (4) review suppliers that submitted claims the OIG found to be in error. CMS concurred with all but the first recommendation. The OIG also has compiled information about its previous reports on improper payments, waste, and fraud associated with power wheelchairs