Welcome to Medical Subject Headings
The Medical Subject Headings (MeSH) thesaurus is a controlled and hierarchically-organized vocabulary produced by the National Library of Medicine. It is used for indexing, cataloging, and searching of biomedical and health-related information. MeSH includes the subject headings appearing in MEDLINE/PubMed, the NLM Catalog, and other NLM databases.
Visit our What's New page to see all recent MeSH developments including the most recent ones listed below
- 2019 MeSH files are now in production
- A new class of Supplemental Records (SCRs) has been released
- The class 4 SCRs are devoted to specific organisms
- The records will be updated on a daily basis in response to new and important species appearing in the literature
- Indexers will be able to use the new organism SCRs on a timely basis
- MeSH in Resource Description Format(RDF) is now in production
- MeSH on Demand 2.0 has been re-engineered and improved in response to your suggestions.
- Matching MeSH terms are now highlighted in response to your submitted text
- MeSH headings now include links to scope notes
- Custom PubMed searches are more easily made
- Term expansion and tree-based searching features have been added
- You can now display of similar article titles from PubMed
Obtain MeSH Data
Learn About MeSH
- Tutorials and Webinars
- MeSH Vocabulary
- Search and Retrieval using MeSH
Related MeSH Efforts
- RxNorm: A drug vocabulary used for e-prescribing, formulary, medication history, government reporting, drug compendia mapping, and other uses
- Daily Med: Provides trustworthy information about marketed drugs in the United States
- Unified Medical Language System (UMLS®) Metathesaurus: A collection of biomedical names and codes grouped as sets of synonyms, derived from over 150 medical vocabulary sources.
- NLM Classification: A NLM vocabulary used for the arrangement of library materials in the field of medicine and related sciences.
User Input and Suggestions
Last Reviewed: August 21, 2019