Who publishes NLM Classification?

National Library of Medicine, part of U.S. Department of Health & Human Services, publishes this dataset on Data.gov.

How often is it updated?

The publisher does not list a schedule. The last update was on 06/18/2025.

How do I download it?

It is available as PDF. Use the links in Files and access, which open the official government source.

Checked Oct 30, 2026

Federal dataParks & Recreation

NLM Classification

Name: NLM Classification
Creator: National Library of Medicine
Published: 2021-08-26T00:00:00.000Z

Published by National Library of Medicine · Updated 06/18/2025

Official source Download PDF

Last updated: 06/18/2025; First published 08/26/2021
Update frequency: Not listed
Formats: 1; PDF
Coverage: Nationwide; Federal data

About this dataset

A product of the National Library of Medicine for the arrangement of library materials in the field of medicine and related sciences used internationally. The NLM Classification is updated twice a year with the winter edition published in January and the summer edition published in August. Publication of printed editions ceased with the 5th revised edition, 1999. Beginning with the 2006 edition, the NLM Classification is also available in PDF (Portable Document Format) at https://www.nlm.nih.gov/class/terms_cond.html

Parks & Recreation

Files and access

Links open the official government source

NLM Policy on Classificationclassification.nlm.nih.govPDF
19th Century Scheduleclassification.nlm.nih.govWeb page
Table G (Geographic Notation)classification.nlm.nih.govWeb page
Canceled Class Numbers (Cumulative List)classification.nlm.nih.govWeb page
Class Numbers Added (Cumulative List)classification.nlm.nih.govWeb page
Class Numbers Added and Canceled (Current Edition)classification.nlm.nih.govWeb page
Outline of the NLM Classificationclassification.nlm.nih.govWeb page

Links open outside websites we do not control.

Frequently asked questions

Who publishes NLM Classification?: National Library of Medicine, part of U.S. Department of Health & Human Services, publishes this dataset on Data.gov.
How often is it updated?: The publisher does not list a schedule. The last update was on 06/18/2025.
How do I download it?: It is available as PDF. Use the links in Files and access, which open the official government source.

Where this catalog comes from

Data.gov CatalogU.S. General Services Administration
State and local open data portalsSocrata Discovery API
State and city CKAN portalsCalifornia, Virginia, Boston, Houston and more
Government ArcGIS Hub sitesCity and county GIS data

Catalog checked 10/24/2026

We list dataset descriptions only. Downloads and APIs link straight to the official government source, which holds the current version and its terms of use.

Source: Data.gov · Last updated 10/24/2026 · Listing only; the data stays with the publisher