On October 9, 2009, CMS issued a transmittal to contractors highlighting several HHS Office of Inspector General (OIG) reports with recommendations on addressing Medicare’s vulnerability to questionable claims. In particular, CMS cites OIG reports on Medicare Part B chemotherapy administration payments, nonphysicians who performed Medicare physician services, inappropriate Medicare payments for chiropractic services, and Medicare Part B billing for ultrasound. CMS directs contractors to review claims data for services mentioned in the OIG reports and take appropriate action (e.g., prepayment edits and reviews, postpayment reviews, and physician/supplier education), if the data warrants action.