Unified Medical Language System® (UMLS®)
2011AB FDA National Drug Code Directory Source Information
Counts
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| Semantic Type |
Count |
Percentage |
| CLINICAL DRUG |
16434 |
80.1 |
| MEDICAL DEVICE |
2789 |
13.6 |
| DRUG DELIVERY DEVICE |
738 |
3.6 |
| PHARMACOLOGIC SUBSTANCE |
503 |
2.5 |
| ORGANIC CHEMICAL |
307 |
1.5 |
Notes
- Semantic Types are a set of broad subject areas that provide a consistent categorization of concepts represented in the Metathesaurus. Semantic Types are arranged into two mutually exclusive hierarchies, Entity and Event.
- Semantic Types help summarize the content of a source.
- Each Metathesaurus concept is assigned at least one semantic type, many have more than one.
- The report displays the most frequently assigned semantic types in descending order, up to a total of 1%.
- The 'Count' field below is the number of concepts assigned a specific semantic type and containing at least one atom from the source.
- The 'Percentage' field below is the count relative to the total number of concepts that contain an atom from that source.
- The MRSTY file contains one row for each Semantic Type assigned to each concept. All Metathesaurus concepts have at least one entry in this file.
- See Chapter 5 of the UMLS Reference Manual to read more about the Semantic Network
