Direct comparison
Doi Vs Pmid: Key Differences & Comparison | CASRAI
A DOI and a PMID both identify scholarly works, but they are different kinds of identifier. A DOI is a globally resolvable persistent identifier for many output types; a PMID is a record number within PubMed for biomedical literature. A PMCID is a related but distinct identifier for full text in PubMed Central.
Side-by-side comparison
| Dimension | DOI | PMID |
|---|---|---|
| What it identifies | A digital object — article, dataset, software, and more | A record in the PubMed database (mostly biomedical articles) |
| Full name | Digital Object Identifier | PubMed Identifier (PubMed ID) |
| Issued by | Registration agencies (Crossref, DataCite, and others) | US National Library of Medicine (NCBI/PubMed) |
| Format example | 10.1234/abc.123 | 34567890 (a plain number) |
| Resolvable? | Yes — via https://doi.org/ to the current landing page | Indirectly — look up at pubmed.ncbi.nlm.nih.gov/<PMID>/ |
| Scope of literature | All disciplines and many output types | Biomedicine and life sciences (PubMed's remit) |
| Persistence model | Persistent identifier with managed resolution (ISO 26324) | Stable database accession number, not a managed resolver |
| Related identifier | Standalone; links out to other PIDs in metadata | PMCID — separate identifier for the full text in PubMed Central |
| Typical use | Citing and linking outputs across the scholarly record | Locating and managing references within PubMed |
Common questions
FAQ
Can one article have both a DOI and a PMID?+
Yes — a biomedical journal article indexed in PubMed will usually have both. The DOI is the publisher-assigned persistent identifier that resolves to the article, while the PMID is the record number for that article inside PubMed. Reference managers often store both.
What is the difference between a PMID and a PMCID?+
A PMID identifies a record in PubMed (the bibliographic index). A PMCID identifies the full-text copy of an article in PubMed Central, the open-access repository. An article can have a PMID without a PMCID if its full text is not deposited in PMC.
Why is a DOI resolvable but a PMID is not?+
A DOI is built on a managed resolver (doi.org) that redirects to the current location, so it works as an actionable link. A PMID is an accession number within PubMed; you locate the record by querying PubMed rather than by resolving the number directly, though PubMed URLs do embed it.
Which should I cite?+
Cite the DOI when available — it is persistent, resolvable, and works across disciplines. Including the PMID as well is helpful for biomedical readers who search PubMed, but the DOI is the primary, durable link to the work.
