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FAQ: Finding NLM Serials Data and MEDLINE Indexed Journals

How can I find a list of journals currently indexed in MEDLINE?
Where can I find NLM Serials data?

To get a list of journals indexed in MEDLINE:

The NLM Catalog has a journal subset that includes journals cited in all Entrez databases. The journals in this subset have been or are currently indexed for MEDLINE, the largest component of the PubMed database.

  • To retrieve a list of all currently indexed MEDLINE journals go to the NLM Catalog and enter the following search in the search box:
  • To see a list of all journals indexed over time for MEDLINE go to the NLM Catalog and enter the following search in the search box:

Please note that titles newly selected for MEDLINE indexing are announced on the Journals Recently Accepted by NLM for Inclusion in MEDLINE Web page.

NLM Serials data is available from:

  • In the following additional machine-readable formats:
    Users of these data must arrange for their own Information Technology (IT) support to manipulate the data into a more human-readable format.

Database descriptions:

  • LocatorPlus
    LocatorPlus is the NLM free online public access catalog and a component of the NLM integrated library system. It contains bibliographic data for over 1.2 million journals, books, audiovisuals, computer software, electronic resources, and other materials.

    Use LocatorPlus:
    To find records for journals, books, reports and audiovisuals in the NLM collection
    To find records for serials and books not in the NLM collection, but owned by regional libraries
    To see records for journals, books, reports and audiovisuals on order, on loan, or in process at the NLM
  • NLM Catalog
    The NLM Catalog provides an alternate search interface to NLM bibliographic data originally appearing in LocatorPlus. The NLM Catalog resides as one of the database's in the Entrez retrieval system. The subset of journals cited in NCBI databases in NLM Catalog has a total of about 19,000 journals. Of these over 14,000 journals are considered to be MEDLINE journals (of which over 5,400 are currently indexed). About 6,000 are journals that are either cited in the other Entrez databases, or were indexed selectively for only certain subject areas such as population demographics or history of medicine by collaborating partners for MEDLINE. Users interested in detailed indexing information for MEDLINE journals may select the Journal display format when viewing MEDLINE journal records to view this information.

    The Entrez retrieval system was developed by the National Center for Biotechnology Information (NCBI) at the National Library of Medicine, located at the National Institutes of Health (NIH). Entrez is the text-based search and retrieval system used at NCBI for services including PubMed, NLM Catalog, OMIM, Nucleotide and Protein Sequences, Protein Structures, Complete Genomes, Taxonomy, and others.