Code System(s) from American Medical Association
- Current Procedural Terminology (CPT®) Fourth Edition (CPT-4)
Code System(s) from Accredited Standards Committee X12
- Accredited Standards Committee (ASC) X12 Standards Release 004010
Code System(s) from Centers for Disease Control and Prevention
- Race and Ethnicity Code Sets
- Codes for Vaccine Administered (CVX code)
- Manufacturers of Vaccines (MVX)
- Implementation Guide for Immunizations Data Transaction using Version 2.3.1 of the Health Level Seven (HL7) Standard Protocol. Implementation Guide Version 2.2 June 2006 (Metadata)
Code System(s) from Federal Information Processing Standards Publication 5-2
- Codes for the Identification of the States, the District of Columbia and the Outlying Areas of the United States, and Associated Areas Publication # 5-2, May, 1987
Code System(s) from Food and Drug Administration
- National Drug Code (NDC)
- Unique Ingredient Identifier (UNII)
Code System(s) from Health Level Seven V2 and V3
- HL7 Messaging Standard Version 2.5.1 and Health Level Seven (HL7) Version 3.0 Vocabulary (Metadata)
Code System(s) from Human Genome Organization
- Gene Names
Code System(s) from Human Genome Variation Society
- Description of Sequence Variants – February, 20, 2008
Code System(s) from World Health Organization
- International Classification of Functioning, Disability and Health (ICF)
Code Systems(s) from International Health Terminology Standards Development Organization
- International Health Terminology Standards Development Organisation (IHTSDO) Systematized Nomenclature of Medicine Clinical Terms (SNOMED CT®) (Source: NLM, UMLS)
Code System(s) from International Organization for Standardization
- ISO 3166-1 Codes for the representation of names of countries and their subdivisions: Part 1 Countries
Code System(s) from Internet Engineering Task Force
- Tags for Identifying Languages, "Request for Comment" (RFC) # 4646, September, 2006
Code System(s) from Regenstrief Institute, Inc
- Logical Observation Identifiers Names and Codes (LOINC®)
- Unified Code for Units of Measure (UCUM)
Code System(s) from National Center for Biotechnology Information
- Genetic Reference Sequences
Code System(s) from National Cancer Institute
- National Cancer Institute (NCI) Thesaurus
Code System(s) from National Library of Medicine
- RxNorm
Code System(s) from National Uniform Billing Committee
- Uniform Bill (UB-04) Current UB Data Specification Manual (Metadata)
Code System(s) from National Uniform Claim Committee
- Healthcare Provider Taxonomy
Code System(s) from United States Postal Service
- Postal Codes
Code System(s) from U.S. Veterans Health Administration
- Code System(s) from U.S. Veterans Health Administration National Drug File Reference Terminology (NDF-RT) Formulary

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