Medical Subject Headings (MeSH)

Medical Subject Headings (MeSH) is a hierarchically-organized terminology for indexing and cataloging of biomedical information. It is used for the indexing of PubMed and other NLM databases. Please see the Terms and Conditions for more information regarding the use and re-use of MeSH. NLM produces Medical Subject Headings XML, ASCII, MARC 21 and RDF formats.

Updates to the data files are made according to the following schedule:

MeSH XML MeSH Descriptor files updated annually MeSH Qualifier files updated annually MeSH Supplemental Concept Records (SCR) updated daily (Monday - Friday)

MeSH ASCII MeSH Descriptor files updated annually MeSH Qualifier files updated annually MeSH Supplemental Concept Records (SCR) updated daily (Monday - Friday)

MeSH MARC21 All files posted monthly

MeSH RDF All files posted daily (Monday - Friday)

Data and Resources

Field Value
accessLevel public
bureauCode {009:25}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://healthdata.gov/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier https://datadiscovery.nlm.nih.gov/api/views/arcv-nkd5
issued 2020-08-06
landingPage https://www.nlm.nih.gov/mesh/meshhome.html
license http://opendefinition.org/licenses/odc-odbl/
modified 2025-07-16
programCode {009:041}
publisher National Library of Medicine
resource-type Dataset
source_datajson_identifier true
source_hash edc50b7a68bd0cb1e57e5a15d8d2f2e122aeed75ea99743ed2a63adf9cd19f7a
source_schema_version 1.1
theme {Terminology}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • api
  • dataset
  • health-data-standards
  • terminologies
isopen False
license_id other-license-specified
license_title other-license-specified
maintainer National Library of Medicine
maintainer_email custserv@nlm.nih.gov
metadata_created 2025-09-24T09:41:01.682126
metadata_modified 2025-09-24T09:41:01.682133
notes Medical Subject Headings (MeSH) is a hierarchically-organized terminology for indexing and cataloging of biomedical information. It is used for the indexing of PubMed and other NLM databases. Please see the Terms and Conditions for more information regarding the use and re-use of MeSH. NLM produces Medical Subject Headings XML, ASCII, MARC 21 and RDF formats. Updates to the data files are made according to the following schedule: MeSH XML MeSH Descriptor files updated annually MeSH Qualifier files updated annually MeSH Supplemental Concept Records (SCR) updated daily (Monday - Friday) MeSH ASCII MeSH Descriptor files updated annually MeSH Qualifier files updated annually MeSH Supplemental Concept Records (SCR) updated daily (Monday - Friday) MeSH MARC21 All files posted monthly MeSH RDF All files posted daily (Monday - Friday)
num_resources 9
num_tags 12
title Medical Subject Headings (MeSH)