RxNorm Extension

OMOP RxNorm Extension

RxNorm Extension 2026-06-05

Concept LookupShow API example

Concepts

2,171,452

  • Standard1,864,38686%
  • Other307,06614%

228,088 invalid (11%)

Domain mix

1 domain

Drug

1,943,36489%

Get OMOP RxNorm Extension via the API

Query every concept in this vocabulary over HTTPS, against the current release. No downloads, no local database.

curl "https://api.omophub.com/v1/vocabularies/RxNorm Extension" \
  -H "Authorization: Bearer $OMOPHUB_API_KEY"
Get your free API key3,000 calls/month free