NLM verification guide
How to check PubMed and MEDLINE indexing
PubMed, MEDLINE, and PubMed Central are related but not interchangeable. Authors should verify the exact journal record and read the status language carefully before relying on a website badge or invitation email.
Maintained by the Beallslists.com editorial review team · Last reviewed: July 16, 2026
Understand the three terms
PubMed is a search system containing citations from MEDLINE and other sources. MEDLINE is an NLM bibliographic database whose journals undergo a selection process. PubMed Central is a full-text archive. An article can appear in PubMed because it is deposited in PMC even when the journal is not fully indexed for MEDLINE.
Step-by-step check
- Copy the exact journal title and ISSN from a recent article.
- Search the NLM Catalog using the title and ISSN.
- Open the exact record and confirm publisher and title history.
- Read the indexing statement and coverage dates.
- Look for wording such as “currently indexed for MEDLINE,” “selected citations only,” or links to PMC participation.
- Search PubMed for the journal title and inspect why records are present.
Common sources of confusion
A journal may say “articles are available in PubMed,” which can be true for selected author manuscripts, funded papers, or archive deposits. That statement should not be shortened to “the journal is MEDLINE indexed.” Similarly, being listed in the NLM Catalog means NLM has a bibliographic record; it does not by itself prove current MEDLINE selection.
What to compare on the journal website
- Does the wording match the official record?
- Is the exact ISSN the same?
- Are coverage dates disclosed?
- Does the site distinguish article-level appearance from journal-level indexing?
- Does the logo link to an official result?
Example interpretation
Suppose PubMed contains twelve papers from a journal, but the NLM Catalog says “selected citations only” and “not currently indexed for MEDLINE.” The accurate description is that selected articles are discoverable in PubMed; it is not accurate to describe the journal as fully MEDLINE indexed.
Why coverage dates matter
A journal may have been indexed under a former title, may have ceased publication, or may have changed publisher. Confirm that current issues fall within the recorded coverage period. Historical inclusion should not be presented as uninterrupted current indexing.
What to do if the claim is unclear
Ask the journal for the direct official record and a written explanation of the status. Retain the reply. For promotion, funding, or degree requirements, obtain confirmation from your institution because local rules may require MEDLINE rather than general PubMed discoverability.