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UMLS Concepts

The U.S. National Library of Medicine (NLM) has developed the Unified Medical Language System (UMLS) to "facilitate the development of computer systems that behave as if they 'understand' the meaning of the language of biomedicine and health." NGC's master's level indexers apply terms from selected UMLS vocabularies to each guideline summary, expert commentary, and guideline synthesis to facilitate searching and browsing and to create relationships between similar documents. These vocabularies are:

  • Healthcare Common Procedure Coding System (HCPCS)
  • International Classification of Diseases – Clinical Modification (ICD-9-CM)
  • Medical Subject Headings (MeSH)
  • Physician Data Query (PDQ)
  • Standard Product Nomenclature (SPN)
  • Systemized Nomenclature of Medicine (Clinical Terms) (SNOMED CT)
  • UMLS Metathesaurus (MTH)
  • Universal Medical Device Nomenclature System (UMDNS)

Page Last Reviewed or Updated: January 01, 0001