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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…
Updated Oct 29, 2026
HealthData.Gov
An overview of Annual MeSH Processing (AMP) for MeSH/MEDLINE, including downloadable datasets detailing changes to MeSH
Updated Oct 29, 2026
HealthData.Gov
(Includes MeSH 2023 and 2024 changes) The MeSH 2025 Update - Registry Number Update Report lists changes to Registry Numbers on a Descriptor or Supplementary Concept Record (SCR). This report includes MeSH changes from…
Updated Oct 29, 2026
HealthData.Gov
(Includes MeSH 2023 and 2024 changes) The MeSH 2025 Update - Add Report lists new Descriptors and Supplementary Concept Records (SCRs) that have been added to MeSH for the upcoming new release. It also includes terms…
Updated Oct 29, 2026
HealthData.Gov
(Includes MeSH 2023 and 2024 changes) The MeSH 2025 Update - Delete Report lists Descriptors and Supplementary Concept Records (SCRs) that have been removed from MeSH. This report includes MeSH changes from previous…
Updated Oct 29, 2026
HealthData.Gov
(Includes MeSH 2023 and 2024 changes) The MeSH 2025 Update - Replace Report lists Descriptors and Supplementary Concept Records (SCRs) where an existing MeSH term has been replaced by another term. Note that replacement…
Updated Oct 29, 2026
HealthData.Gov
(Includes MeSH 2023 and 2024 changes) NOTE - There are no Merges for 2025 MeSH. The MeSH 2025 Update - Merge Report describes cases where two or more terms have merged into a single term. The term(s) being merged into…
Updated Oct 29, 2026
HealthData.Gov
(Includes MeSH 2023 and 2024 changes) The MeSH 2025 Update - Update (All Fields) Report lists each individual modification made to a Descriptor or Supplementary Concept Record (SCR). More than one field on a term can be…
Updated Oct 29, 2026
HealthData.Gov
(Includes MeSH 2023 and 2024 changes) The MeSH 2025 Update - Combine Report lists new Entry Combinations. These are cases where a new, precoordinated Descriptor has been created to replace an existing Descriptor /…
Updated Oct 29, 2026
HealthData.Gov
(Includes MeSH 2023 and 2024 changes) The MeSH 2025 Update - Preferred Term Update Report lists changes to the Preferred Term of a Descriptor or a Supplementary Concept Record (SCR). This report includes MeSH changes…
Updated Oct 29, 2026
HealthData.Gov
The Global Unique Device Identification Database (GUDID) contains key device identification information submitted to the FDA about medical devices that have Unique Device Identifiers (UDI).
Updated Oct 29, 2026
HealthData.Gov
Clinical Table Search Service (formerly "lforms-service") is a web service which software programs can use for querying clinical data tables.
Updated Oct 29, 2026
HealthData.Gov
RxNav-in-a-Box provides users with a locally-installable RxNav (https://rxnav.nlm.nih.gov/RxNavDoc.html) and RESTful companion APIs, including RxNorm, RxTerms, RxClass, RxCUI history, and drug-drug interactions.
Updated Oct 29, 2026
HealthData.Gov
A nursing terminologies resource for systems development. Describes the role of SNOMED CT and Laboratory Observation Identifiers Names and Codes (LOINC) in implementing Meaningful Use in the U.S., specifically for the…
Updated Oct 29, 2026
HealthData.Gov
RxTerms is a drug interface terminology derived from RxNorm for prescription writing or medication history recording (e.g. in e-prescribing systems, PHRs). RxTerms is derived only from the non-proprietary content of…
Updated Oct 29, 2026
HealthData.Gov
The VSAC is a repository and authoring tool for public value sets created by external programs. Value sets are lists of codes and corresponding terms, from NLM-hosted standard clinical vocabularies (such as SNOMED CT®,…
Updated Oct 29, 2026
HealthData.Gov
The UMLS integrates and distributes key terminology, classification and coding standards, and associated resources to promote creation of more effective and interoperable biomedical information systems and services,…
Updated Oct 29, 2026
HealthData.Gov
SNOMED CT is one of a suite of designated standards for use in U.S. Federal Government systems for the electronic exchange of clinical health information and is also a required standard in interoperability…
Updated Oct 29, 2026
HealthData.Gov
I-MAGIC (Interactive Map-Assisted Generation of ICD Codes) is an interactive tool to demonstrate how the SNOMED CT to ICD-10-CM map can be used to generate ICD-10-CM codes from clinical problems coded in SNOMED CT.
Updated Oct 29, 2026
HealthData.Gov
RxNorm provides normalized names for clinical drugs and links its names to many of the drug vocabularies commonly used in pharmacy management and drug interaction software, including those of First Databank, Micromedex,…
Updated Oct 29, 2026
