OMOP Standardized Terminologies
The content of this page reflects both the requirements and implementation of the Standard Terminology as part of the OMOP Common Data Model.

The Standard Terminology facilitates the OMOP methodological research by making it possible that methods can be systematically applied to produce meaningfully comparable results across different data sources with different coding schemes. The Standard Terminology enables a mechanism of transforming raw data into standardized data. It also plays a role in searching and querying the transformed data in the Common Data Model, as well as browsing and navigating the hierarchies of classes and abstractions inherent in the transformed data, and interpreting the results returned by those operations.

The Standard Terminologies are consolidated into 5 tables available for download:

1. Concept – containing all disease, drug, procedure, observation etc. concepts
2. Concept Synonym – containing alternative terms
3. Concept Relationship – contains the various relationships between concepts. Relationships can be hierarchical and non-hierarchical
4. Concept Ancestor – compilation of select hierarchical relationships over several levels
5. Source to Concept Map – containing the mapping of source codes to the concepts of the Standard Terminologies

The Standard Terminologies are available for download under the Apache Public License, with the exception of the following proprietary terminologies:

• CPT-4 (AMA)
• GPI (Medi-Span)
• SNOMED Clinical Terms (IHTSDO)
• UMLS (NLM)
• MedDRA (IFPMA)
• NDDF, MDDF, ETC and ATC (FDB)

These resources require an End User License Agreement, which requires registration and limits the use to drug-outcome research in collaboration with OMOP.

Since all Standard Terminologies are consolidated, it is not possible to download individual resources. As a consequence, the EULA has to be signed electronically to be able to download the data tables.

Vocabulary Version 3.0 - June 2010

Click on the links below to download Version 3.0 of the Standard Terminology.

• Specifications
• Vocabulary tables DDL
• Vocabulary Data - CSV format
• Vocabulary Data - SAS format

This version contains concepts, relationships, ancestry relationships and reference files about the following standard vocabularies: