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National Cancer Institute
Enterprise Vocabulary Services
NCIm Version: 201808 (Browser Version 2.9, using LexEVS 6.5.1)
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NCI Metathesaurus (NCIm) is a wide-ranging biomedical terminology database that covers most terminologies used by NCI for clinical care, translational and basic research, and public information and administrative activities.

NCIm features:
  • Maps 6,700,000 terms from more than 85 sources into 2,800,000 biomedical concepts that represent their meaning.
  • Displays preferred terms, synonyms, definitions, and other information from each source.
  • Links to NCI Thesaurus and other related information sources.
  • More than 31,000,000 cross-links between content elements.
  • Updated frequently by a team of biomedical terminology and subject matter experts.
NCIm contains most public domain terminologies from the National Library of Medicine's UMLS Metathesaurus, as well as many other biomedical terminologies created by or of interest to NCI and its partners. Some propriety terminologies are included, with permission, and have restrictions on their use (see details). The current version of the NCI Metathesaurus, based on the UMLS build 2016AB, covers up to National Cancer Institute Thesaurus, 18.07E.
EVS NCI Enterprise Vocabulary Services: Terminology resources and services for NCI and the biomedical community.
NCIt NCI Thesaurus: Reference terminology for NCI, NCI Metathesaurus and NCI informatics infrastructure.
NCI Term Browser NCI Term Browser: NCI and other terminologies in an integrated environment. NCI Terminology Resources: More information on NCI dictionaries and resources.
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