CMS 1500 AND HCFA – Definitions
Definition :
The HHS agency responsible for Medicare and parts of Medicaid.? Centers for  Medicare & Medicaid Services has historically maintained the UB-92  institutional 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.
Definition HCFA
HCFA: The Health Care Finance Administration, the part of the U.S. Department of Health and Human Services (HHS) that is responsible for administering Medicare and Medicaid.
CMS-1450 – The uniform institutional claim form.
CMS-1500 – The uniform professional claim form.
