OMOP/Documentation/StandardizedVocabularies/VOCABULARY.md

OMOP Common Data Model v5.1 Specifications
Authors: Christian Reich, Patrick Ryan, Rimma Belenkaya, Karthik Natarajan, Clair Blacketer
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3.2 VOCABULARY

The VOCABULARY table includes a list of the Vocabularies collected from various sources or created de novo by the OMOP community. This reference table is populated with a single record for each Vocabulary source and includes a descriptive name and other associated attributes for the Vocabulary.

Field	Required	Type	Description
vocabulary_id	Yes	varchar(20)	A unique identifier for each Vocabulary, such as ICD9CM, SNOMED, Visit.
vocabulary_name	Yes	varchar(255)	The name describing the vocabulary, for example "International Classification of Diseases, Ninth Revision, Clinical Modification, Volume 1 and 2 (NCHS)" etc.
vocabulary_reference	Yes	varchar(255)	External reference to documentation or available download of the about the vocabulary.
vocabulary_version	Yes	varchar(255)	Version of the Vocabulary as indicated in the source.
vocabulary_concept_id	Yes	integer	A foreign key that refers to a standard concept identifier in the CONCEPT table for the Vocabulary the VOCABULARY record belongs to.

Conventions

• There is one record for each Vocabulary. One Vocabulary source or vendor can issue several Vocabularies, each of them creating their own record in the VOCABULARY table. However, the choice of whether a Vocabulary contains Concepts of different Concept Classes, or when these different classes constitute separate Vocabularies cannot precisely be decided based on the definition of what constitutes a Vocabulary. For example, the ICD-9 Volume 1 and 2 codes (ICD9CM, containing predominantly conditions and some procedures and observations) and the ICD-9 Volume 3 codes (ICD9Proc, containing predominantly procedures) are realized as two different Vocabularies. On the other hand, SNOMED-CT codes of the class Condition and those of the class Procedure are part of one and the same Vocabulary. Please refer to the Standardized Vocabularies specifications for details of each Vocabulary.
• The vocabulary_id field contains an alphanumerical identifier, that can also be used as the abbreviation of the Vocabulary name.
• The record with vocabulary_id = 'None' is reserved to contain information regarding the current version of the Entire Standardized Vocabularies.
• The vocabulary_name field contains the full official name of the Vocabulary, as well as the source or vendor in parenthesis.
• Each Vocabulary has an entry in the CONCEPT table, which is recorded in the vocabulary_concept_id field. This is for purposes of creating a closed Information Model, where all entities in the OMOP CDM are covered by a unique Concept.
• In past versions of the VOCABULARY table, the vocabulary_id used to be a numerical value. A conversion table between these old and new IDs is given below:

Previous VOCABULARY_ID	Version 5 VOCABULARY_ID
0	None
1	SNOMED
2	ICD9CM
3	ICD9Proc
4	CPT4
5	HCPCS
6	LOINC
7	NDFRT
8	RxNorm
9	NDC
10	GPI
11	UCUM
12	Gender
13	Race
14	Place of Service
15	MedDRA
16	Multum
17	Read
18	OXMIS
19	Indication
20	ETC
21	ATC
22	Multilex
24	Visit
28	VA Product
31	SMQ
32	VA Class
33	Cohort
34	ICD10
35	ICD10PCS
36	Drug Type
37	Condition Type
38	Procedure Type
39	Observation Type
40	DRG
41	MDC
42	APC
43	Revenue Code
44	Ethnicity
45	Death Type
46	Mesh
47	NUCC
48	Specialty
49	LOINC
50	SPL
53	Genseqno
54	CCS
55	OPCS4
56	Gemscript
57	HES Specialty
58	Note Type
59	Domain
60	PCORNet
61	Obs Period Type
62	Visit Type
63	Device Type
64	Meas Type
65	Currency
66	Relationship
67	Vocabulary
68	Concept Class
69	Cohort Type
70	ICD10CM