May 28, 2022

PubMed and PubMed Central Add New Filters to Limit Results to Only Creative Commons Licensed Materials

From the National Library of Medicine Technical Bulletin:

Creative Commons (CC) licenses are types of copyright licenses that allow free distribution of a work. PubMed Central (PMC), the NLM archive of full text journal articles, includes articles that have a Creative Commons license or are in the public domain. The latter covers those articles authored by staff of U.S. government agencies.

NLM now offers a filter for both PubMed Central and PubMed to find articles with unrestricted Creative Commons or public domain (CC0) licenses:

PubMed Central: or add cc0 license[filter] to your search
PubMed: or add pmc cc0 license[filter] to your search

These filters are based on license information that is provided to PubMed Central by publishers. There are many more articles cited in PubMed but not deposited in PMC that have CC0 licenses, but that information is not part of PubMed.

Direct to Complete NLM Post (Includes Screenshot)

Direct to PubMed Central Open Access Subset Info Page

About Gary Price

Gary Price ( is a librarian, writer, consultant, and frequent conference speaker based in the Washington D.C. metro area. Before launching INFOdocket, Price and Shirl Kennedy were the founders and senior editors at ResourceShelf and DocuTicker for 10 years. From 2006-2009 he was Director of Online Information Services at, and is currently a contributing editor at Search Engine Land.