The major focus of the 2022 winter edition was the evaluation of the 2022 MeSH (Medical Subject Headings) vocabulary 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 2022 vocabulary in the MeSH Browser. Additional minor updates were made to the Index and Schedules.

Summary Statistics for the 2022 Winter Edition

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

The 2022 summer version will be published in late August 2022. It will encompass the systematic review of WF (Respiratory System) and WH (Hemic and Lymphatic Systems) schedules.

To learn more about the NLM Classification see the NLM Policy on Classification

Contact NLM if you have questions or comments.

Last Reviewed: February 7, 2022