The OIG has issued a report entitled “Payments for Ambulatory Surgical Center Services Provided to Beneficiaries in Skilled Nursing Facility Stays Covered Under Medicare Part A in Calendar Years 2006 through 2008.” Based on a sample review, the OIG estimates that Medicare contractors made at least $6.6 million in overpayments to ambulatory surgical centers (ASCs) for services provided to beneficiaries during Part A SNF stays in 2006 through 2008. Specifically, in all of the cases reviewed by the OIG, such services were billed to Medicare Part B even though they also were included in the SNFs’ Part A payments. The OIG recommends that CMS recover improper payments, provide guidance to ASCs on SNF consolidated billing requirements, and establish claims edits to prevent Part B payments for ASC services that are subject to consolidated billing.