The Government Accountability Office (GAO) said Wednesday that state and federal Medicaid auditors need to increase their oversight of managed care organizations. In a new report, the GAO says Medicaid auditors are focusing their efforts on fraud and waste from fee-for-service payments while neglecting managed care organizations. The agency recommends the Centers for Medicare and Medicaid Services (CMS) issue guidance to require states to audit payments to and by managed care organizations. It also recommends CMS give additional support for oversight of such organizations by helping audit existing contractors.