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Ontology Visits (May 2017)

# name # visits
1 Current Procedural Terminology (CPT) 81,510
2 Medical Dictionary for Regulatory Activities (MEDDRA) 22,765
3 RxNORM (RXNORM) 14,999
4 SNOMED CT (SNOMEDCT) 12,078
5 National Drug Data File (NDDF) 8,630
6 National Cancer Institute Thesaurus (NCIT) 1,910
7 National Drug File - Reference Terminology (NDFRT) 1,765
8 Medical Subject Headings (MESH) 1,615
9 Read Codes, Clinical Terms Version 3 (CTV3) (RCD) 1,194
10 Logical Observation Identifier Names and Codes (LOINC) 1,127
11 Foundational Model of Anatomy (FMA) 957
12 International Classification of Diseases, Version 10 (ICD10) 871
13 International Classification of Diseases, Version 10 - Clinical Modification (ICD10CM) 713
14 Veterans Health Administration National Drug File (VANDF) 602
15 International Classification of Diseases, Version 9 - Clinical Modification (ICD9CM) 563
16 Gene Ontology (GO) 503
17 World Health Organization (WHO) Adverse Reaction Terminology (WHO-ART) 348
18 Online Mendelian Inheritance in Man (OMIM) 284
19 National Center for Biotechnology Information (NCBI) Organismal Classification (NCBITAXON) 281
20 MedlinePlus Health Topics (MEDLINEPLUS) 130
21 Computer Retrieval of Information on Scientific Projects Thesaurus (CRISP) 121
22 Physician Data Query (PDQ) 110
23 Healthcare Common Procedure Coding System (HCPCS) 101
24 Master Drug Data Base Clinical Drugs (MDDB) 99
25 International Classification of Primary Care (ICPC) 86
26 Coding Symbols for a Thesaurus of Adverse Reaction Terms (COSTART) 85
27 International Classification of Primary Care - 2 PLUS (ICPC2P) 71
28 International Classification of Diseases, Version 10 - Procedure Coding System (ICD10PCS) 43
29 Artificial Intelligence Rheumatology Consultant System Ontology (AI-RHEUM) 21
30 Gene Ontology Extension (GO-EXT) 15
31 Nursing Interventions Classification (NIC) 0