Division of the Department of Health and Human Services (DHHS), formerly Health Care Financing Administration (HCFA). Develops and administers policies for the Medicare program and works with the states to manage the Medicaid program. Responsibilities include managing contractor claims payment, fiscal audit and/or overpayment prevention and recovery, and developing and monitoring payment safeguards necessary to detect and respond to payment errors or abusive patterns of service delivery. CMS sets standards for Medicare Part D insurance plans. CMS maintains the UB-92 institutional EMC format specifications, the professional EMC NSF specifications, and specifications for certifications and authorizations used by the Medicare and Medicaid programs. CMS maintains the HCPCS medical code set and the Medicare Remittance Advice Remark Codes administrative code set.