List of external code systems

URI Source Comment OID (for non-FHIR systems)
http://snomed.info/sct SNOMED CT snomed.org Using SNOMED CT with FHIR 2.16.840.1.113883.6.96
http://loinc.org LOINC LOINC.org Using LOINC with FHIR 2.16.840.1.113883.6.1
http://fhir.de/CodeSystem/bfarm/icd-10-gm BfArM ICD-10-GM See Using ICD with FHIR
urn:iso:std:iso:3166 ISO 3166 Country Codes Using ISO 3166 Country Codes with FHIR
urn:iso:std:iso:3166-2:de ISO 3166-2:DE
urn:oid:2.16.840.1.113883.6.238 Race & Ethnicity - CDC
http://fhir.de/CodeSystem/gender-amtlich-de FHIR Basis R4
http://unitsofmeasure.org UCUM unitsofmeasure.org Using UCUM with FHIR 2.16.840.1.113883.6.8
http://dicom.nema.org/resources/ontology/DCM DICOM Code definitions Definitions The meanings of codes defined in DICOM, either explicitly or by reference to another part of DICOM or an external reference document or standard 1.2.840.10008.2.16.4
http://fhir.de/CodeSystem/bfarm/atc ATC Anatomisch-therapeutisch-chemische Klassifikation deutsche Fassung
http://fhir.de/CodeSystem/ask Arzneistoffkatalog-Nummer
http://fdasis.nlm.nih.gov UNII Unique Ingredient Identifier Using UNII with FHIR 2.16.840.1.113883.4.9
urn:oid:2.16.840.1.113883.6.61 CAS registry system unique numerical identifier of a substance in the CAS Registry system 2.16.840.1.113883.6.61
http://standardterms.edqm.eu EDQM Standard Terms