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NLM Classification Updated, February 4, 2022

February 7, 2022

The big aim of the 2022 winter season edition was the evaluation of the 2022 MeSH (Professional medical Matter Headings) vocabulary for inclusion in the Classification index. Many additions and improvements were designed to the Index and Schedules centered on this assessment. All main index headings are now joined to the 2022 vocabulary in the MeSH Browser. Additional minimal updates ended up designed to the Index and Schedules.

Summary Stats for the 2022 Wintertime Version

  • 14 New Class Numbers
  • 32 Modified Course Quantities
  • 3 Canceled Course Quantities
  • 1 New Plan Header
  • 2 Modified Routine Headers
  • 2 Deleted Program Headers
  • 37 New Index Headings  (33 from 2022 MeSH)
  • 80 Modified Index Headings
  • 1 Deleted Index Heading

The 2022 summertime model will be posted in late August 2022. It will encompass the systematic overview of WF (Respiratory Process) and WH (Hemic and Lymphatic Units) schedules.

To understand far more about the NLM Classification see the NLM Coverage on Classification

Speak to NLM if you have queries or opinions.


The Nationwide Library of Medicine (NLM) is a leader in investigate in biomedical informatics and facts science and the world’s greatest biomedical library. NLM conducts and supports investigation in approaches for recording, storing, retrieving, preserving, and speaking overall health information and facts. NLM creates methods and applications that are used billions of instances just about every 12 months by thousands and thousands of people today to entry and evaluate molecular biology, biotechnology, toxicology, environmental wellbeing, and overall health products and services information and facts. Supplemental details is readily available at https://www.nlm.nih.gov.

Very last Reviewed: February 7, 2022