The U.S. Department of Health and Human Services’ agency responsible for Medicare and parts of Medicaid. The Centers for Medicare and Medicaid Services has historically maintained the UB-92 institutional Electronic Media Claims (EMC) format specifications, the professional EMC NSF specifications, and specifications for various certifications and authorizations used by the Medicare and Medicaid programs. CMS is responsible for oversight of HIPAA administrative simplification transaction and code sets, health identifiers, and security standards. CMS also maintains the HCPCS medical code set and the Medicare Remittance Advice Remark Codes administrative code set.