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NLM Classification Updated, January 31, 2019

January 30, 2019

For the winter edition, the 2019 MeSH (Medical Subject Headings) vocabulary was evaluated for inclusion in the Classification index. Several additions and changes were made to the Index and Schedules based on this review. All main index headings are now linked to the 2019 vocabulary in the MeSH Browser. Additional minor updates were made to the Index and Schedules.

Summary Statistics for the 2019 Winter Edition

  • 74 index main headings added (61 from 2019 MeSH)
  • 172 index entries modified
  • 11 index headings deleted
  • 16 class numbers added [see Class Numbers Added and Canceled (Current Edition)]
  • 55 class number captions or notes modified
  • 1 new schedule range header added
  • 3 schedule range headers modified
  • No class numbers canceled

The 2019 summer version will be published in mid-to-late August 2019. It will encompass the systematic review of the QW (Microbiology. Immunology) and (QX Parasitology) schedules and other miscellaneous updates. The PDF version will be updated with all 2019 classification data in the fall.

Contact NLM for further information, or if you have questions or comments.

Since its founding in 1836, the National Library of Medicine has played a pivotal role in translating biomedical research into practice and is a leader in information innovation. NLM is the world's largest medical library, and millions of scientists, health professionals and the public around the world use NLM services every day.


Last Reviewed: January 30, 2019