ANSI	American National Standards Institute (ANSI): An organization that accredits various standards-setting committees, and monitors their compliance with the open rule-making process that they must follow to qualify for ANSI accreditation. HIPAA prescribes that the standards mandated under it be developed by ANSI-accredited bodies whenever practical.
CDT	Current Dental Terminology: A medical code set, maintained and copyrighted by the ADA, that has been selected for use in the HIPAA transactions.
CPT-4	Current Procedural Terminology, Revision 4: A medical code set, maintained and copyrighted by the AMA, that has been selected for use under HIPAA for non-institutional and non-dental professional transactions.
Centers for Medicare & Medicaid Services (CMS)	This agency, formerly known as HCFA, is the DHHS agency responsible for Medicare and parts of Medicaid. CMS 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 also maintains the HCPCS medical code set and the Medicare Remittance Advice Remark Codes administrative code set.
DSMO	Data Standards Maintenance Organizations
Department of Health and Human Services (DHHS)	The federal government department that has overall responsibility for implementing HIPAA.
HCPCS	HCFA Common Procedural Coding System (Level II contains alphanumeric codes used to bill medical supplies, ambulance services, injectible drugs, and specific supplies that are not included in the CPT medical code set.)
Health Care Financing Administration (HCFA)	Former name for CMS.
ICD-9-CM	International Classification of Diseases, Revision 9, Clinical Modification
X-12	An American National Standards Institute (ANSI)-accredited group that defines EDI standards for many American industries, including health care insurance. Most of the electronic transaction standards mandated or proposed under HIPAA are X12 standards.
NCPDP	National Council for Prescription Drug Programs: An ANSI-accredited group that maintains a number of standard formats for use by the retail pharmacy industry, some of which are included in the HIPAA mandates.
NDC	National Drug Code: A medical code set that identifies prescription drugs and some over the counter products, and that has been selected for use in the HIPAA transactions.