SNOMED CT (Systematized Nomenclature of Medicine -- Clinical Terms), is a systematically organized computer processable collection of medical terminology covering most areas of clinical information such as diseases, findings, procedures, microorganisms, pharmaceuticals, etc.

Alternative Prefixes
SNOMEDCTCT SNOMED_CT SNOMEDCT_US_2022_09_01 SNOMEDCT_US_2023_10_01 SNOMEDCT_2010_1_31 SNOMEDCT_US_2021_03_01 SNOWMEDCT_US SNOMEDCT_US_2020_03_01 SNOMEDCT_US_2021_07_31 SNOMED_CT_US_2018_03_01 SNOMEDCT_US_2019_09_01 SNOMEDCT_US_2022_07_31 SNOMEDCTCT_2018_03_01 SCTID SNOMEDCT_US_2018_03_01 SNOMEDCT_US_2023_03_01 SNOMEDCT_US_2015_03_01 SNOMEDCT_US SNOMEDCT_US_2020_09_01 SNOWMEDCT SNOMEDCT_2020_03_01 SNOMEDCT_US_2016_03_01 SNOMEDCT_US_2023_11_01 SNOWMEDCT_US_2018_03_01 SNOMEDCT_US_2018_09_01 SNOMEDCT_US_2021_09_01 SNOMEDCT_2005_07_31 SNOMEDCT SNOMEDCT_US_2023_02_28 SNOMED SNOMECT SNOMEDCT_US_2023_09_01 SNOMEDCTCT_2019_03_01 SNOMEDCT_US_2022_12_31 SNOMEDCT_US_2019_03_01 SCTID_2010_1_31
biomedical science health science medicine ontology preclinical studies
Homepage OWL
Jan Willis, NLM
Pattern for Local Unique Identifiers

Local identifiers in SNOMED CT (International Edition) should match this regular expression:

Example Local Unique Identifier
284196006   Resolve
Pattern for CURIES

Compact URIs (CURIEs) constructed from SNOMED CT (International Edition) should match this regular expression:

Example CURIE
2006 Standardized nursing language in the systematized nomenclature of medicine clinical terms: A cross-mapping validation method

A summary of the relations in the Bioregistry schema can be found here.

In Collection
FHIR External Terminologies
Metaregistry SNOMED CT (International Edition)

The metaregistry provides mappings between the Bioregistry and other registries. There are 11 mappings to external registries for this resource with 5 unique external prefixes.

Registry Name Registry Metaprefix External Prefix Curate
AberOWL AberOWL logo aberowl SNOMEDCT
BioContext biocontext SNOMEDCT
Biolink Biolink Model Registry logo biolink SNOMEDCT
BioPortal BioPortal Prefixes logo bioportal SNOMEDCT
FAIRSharing FAIRSharing logo fairsharing FAIRsharing.d88s6e
HL7 HL7 External Code Systems logo hl7 2.16.840.1.113883.6.96 logo miriam snomedct
N2T Name-to-Thing logo n2t snomedct
OLS Ontology Lookup Service logo ols snomed
Prefix Commons Prefix Commons logo prefixcommons snomedct
Wikidata Wikidata Property logo wikidata P5806
RDF Information

When using this resource in RDF, the following URI format should be used:$1


A provider turns a local unique identifiers from a resource into a URI. Many providers are also resolvable as URLs (i.e., they can be used in a web browser).

The local unique identifier 284196006 is used to demonstrate the providers available for SNOMED CT (International Edition). A guide for curating additional providers can be found here.

Name Metaprefix URI
SNOMED CT (International Edition) snomedct
SNOMED CT (International Edition) (RDF) rdf
Bioregistry bioregistry miriam
Name-to-Thing n2t
Extra Providers

Additional providers curated in the Bioregistry are listed here. These are typically inherited from or Prefix Commons, and need extra curation.

Code Name URL
bio2rdf Bio2RDF