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Federal
Unified Medical Language System (UMLS)
U.S. Department of Health & Human Services —
The UMLS integrates and distributes key terminology, classification and coding standards, and associated resources to promote creation of more effective and... -
Federal
MeSH on Demand
U.S. Department of Health & Human Services —
MeSH on Demand identifies MeSH Terms in your text using the NLM Medical Text Indexer (MTI) program. After processing, MeSH on Demand returns a list of MeSH Terms... -
Federal
NIH Common Data Elements Repository
U.S. Department of Health & Human Services —
The NIH Common Data Elements (CDE) Repository has been designed to provide access to structured human and machine-readable definitions of data elements that have been... -
Federal
Nursing Resources for Standards and Interoperability
U.S. Department of Health & Human Services —
A nursing terminologies resource for systems development. Describes the role of SNOMED CT and Laboratory Observation Identifiers Names and Codes (LOINC) in... -
Federal
Medical Text Indexer (MTI)
U.S. Department of Health & Human Services —
A system for producing indexing recommendations to assist in the indexing process at NLM. Currently provides indexing recommendations to more than 100 journals based... -
Federal
AccessGUDID
U.S. Department of Health & Human Services —
The Global Unique Device Identification Database (GUDID) contains key device identification information submitted to the FDA about medical devices that have Unique... -
Federal
Medical Subject Headings (MeSH)
U.S. Department of Health & Human Services —
Medical Subject Headings (MeSH) is a hierarchically-organized terminology for indexing and cataloging of biomedical information. It is used for the indexing of PubMed... -
Federal
RxNav-in-a-Box
U.S. Department of Health & Human Services —
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,... -
Federal
UCUM Web API Service
U.S. Department of Health & Human Services —
A web API service for validating and converting unit expressions from the Unified Code for Units of Measure (UCUM). http://unitsofmeasure.org/trac -
Federal
Value Set Authority Center
U.S. Department of Health & Human Services —
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... -
Federal
MAGPIE (Map Assisted Generation of Procedure and Intervention Encoding) [DEMO]
U.S. Department of Health & Human Services —
MAGPIE is an interactive tool to help users (e.g., professional coders, researchers, clinicians) find SNOMED CT and ICD-10-PCS codes for medical procedures and... -
Federal
MeSH 2025 Update - Preferred Term Update Report
U.S. Department of Health & Human Services —
(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... -
Federal
MeSH 2025 Update - Add Report
U.S. Department of Health & Human Services —
(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...