OMOPHub

Hosted API for the OHDSI OMOP vocabularies: search, map and resolve 11M+ medical concepts (SNOMED CT, ICD-10, LOINC, RxNorm). No ATHENA downloads.

OMOPHub gives healthcare data teams instant API access to the OHDSI standardized vocabularies: 11M+ concepts across 120+ vocabularies, including SNOMED CT, ICD-10, LOINC and RxNorm. It offers semantic and multilingual search, cross-vocabulary mappings, hierarchy navigation, FHIR-to-OMOP resolution, a FHIR terminology service, Python/R/Node SDKs and an MCP server for AI agents.

What OMOPHub does

  • Search medical concepts across 120+ vocabularies
  • Map concepts across vocabularies
  • Explore vocabulary hierarchies and relationships
  • Resolve FHIR codes to OMOP concepts
  • Track vocabulary versions
  • Access Python, R, and TypeScript SDKs

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