Skip to main content
U.S. flag

An official website of the United States government

Service Alert: Planned Maintenance beginning July 25th

Some services may be unavailable or have limited functionality for 24 hours or longer starting 9 PM EDT. Learn more about the maintenance.

NLM Classification Updated, September 21, 2021

The 2021 summer version encompasses the systematic review of the WU (Dentistry. Oral Surgery) and WV (Otolaryngology).

For more information about the scope of the 2021 summer edition, see  https://classification.nlm.nih.gov/scope.

Contact NLM for further information, questions, or comments.

Last Reviewed: September 24, 2021