OHDSI Standardized Vocabularies

The Standardized Vocabularies contain all of the code sets, terminologies, vocabularies, nomenclatures, lexicons, thesauri, ontologies, taxonomies, classifications, abstractions, and other such data that are needed for:

• Generation of the transformed (i.e., standardized) data from the raw source dataset into the OMOP CDM,
• Searching, querying, and extraction of the transformed data, browsing and navigating the hierarchies of classes and abstractions inherent in the transformed data, and
• Interpreting the meanings of the data.

Standardized Vocabularies are an integral part of the OMOP CDM. This asset is available for free to anyone and can be downloaded from the download page. Unless otherwise specified for a few commercial vocabularies, vocabularies and their concepts are Open Source. Please see Apache License V2.0 for details.

Please refer to the sections below for more information on the corresponding topics.

News

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Introduction and OHDSI Vocabularies Principles

The introduction page brings you to the overview of the Vocabularies principles and history.

Glossary

The glossary provides some common terms we use.

General Structure, Download and Use

This page describes the basic elements of the Vocabularies: concepts, relationships, and domains.

The Vocabulary Team

Here you can find the the Vocabulary Team members and their areas of expertise.

Community Contribution

This page provides an overview of how you can incorporate your content in the OHDSI vocabularies. Currently contains the information for Part I, non-drug vocabularies, and drug vocabularies.

Roadmap

The roadmap page provides information on upcoming releases and their content.

Release Notes

Release notes (automatically generated) provide information about changes in past releases. The "What's New" section provides the most important changes we want to highlight.

Upcoming Changes

Upcoming changes in future releases that could affect ETL or studies.

Quality Management System reports

The reports on adherence to the OHDSI Vocabulary Principles.

Domains

This page contains information on specific domains.

Vocabularies

This page contains links to documentation on specific vocabularies.

Vocabulary Metadata

This page contains information on metadata elements related to vocabulary content.

Vocabulary Statistics

This page is a current snapshot of the content of each vocabulary in numbers (domains, classes, relationships).

Quality Assurance and Control

This page contains information on the quality assurance and quality control procedures in the Vocabularies.

Known Issues in Vocabularies

Here you can find the information about the known issues in the Vocabularies.

Articles

Articles on specific topics not otherwise classified.

COVID-19 Vocabulary/ETL Instructions

Instructions regarding COVID-19 terms.

Historical Versions

This page contains information on revisions, improvements, and structural changes of the Standardized Vocabularies.