To download the above releases, you must have agreed to the UMLS Metathesaurus
License and have a UMLS Terminology Services login.
of terms Official name AOD 20,685 Alcohol and Other Drug Thesaurus CHV 146,324 Consumer Health Vocabulary DXP 10,113 DXplain (an expert diagnosis program) MSH 815,608 Medical Subject Headings MTH 171,407 UMLS Metathesaurus
MTHFDA 86,069 Metathesaurus FDA National Drug Code Directory MTHSPL 113,248 Metathesaurus FDA Structured Product Labels NCBI 1,265,703 National Center for Biotechnology Information Taxonomy NCI 255,108 National Cancer Institute Thesaurus RXNORM 628,521 RxNorm Vocabulary SNM 44,274 Systemized Nomenclature of Medicine SNMI 164,179 Systemized Nomenclature of Human and Veterinary Medicine SNOMEDCT US 1,225,189 Systemized Nomenclature of Medicine--Clinical Terms (U.
Licensees of the UMLS Metathesaurus have access to the Systematized Nomenclature of Medicine Clinical Terms, generally known as SNOMED CT (owned and maintained by the International Health Terminology Standards Development Organisation in Denmark), which is a multilingual terminology developed to retrieve and code clinical information reliably from EMRs (Cornet and de Keizer 2008).
These various classification schemes often do not overlap, necessitating methods such as the UMLS Metathesaurus for cross-walking concepts and terms (Pathak et al.
To overcome these difficulties, the UMLS Metathesaurus
 was used to achieve translation of the patient data (see section 4).
Cross-language information retrieval with the UMLS metathesaurus
One of the four knowledge sources for the UMLS is the UMLS Metathesaurus
, a "uniform, integrated distribution format for more than 30 biomedical vocabularies and classifications" (National Library of Medicine, 1997).
Apelon has assisted the National Library of Medicine in the development and maintenance of the UMLS Metathesaurus
for the past 16 years and has intimate knowledge of its structure and content.
0 provides the ability to search, retrieve, and filter terms, concepts, attributes, relations, metadata and more from over 160 vocabularies of the UMLS Metathesaurus
, as well as the Semantic Network.
The UMLS Metathesaurus
is the source of concepts and has been found to improve the quality of the parser and to provide needed additional search terminology lacking in queries.
Apelon has worked with the NLM on the UMLS Metathesaurus
for the past fifteen years.
While other terminology systems limit users to one or only a few vocabularies, the new Apelon Knowledge Base brings together all major healthcare terminologies including SNOMED CT, CPT, ICD-9, ICD-10, drug vocabularies from FirstData Bank and Multum, and all vocabularies available in the NLM's UMLS Metathesaurus