Standardized Data: The OMOP Common Data Model

The Observational Medical Outcomes Partnership (OMOP) Common Data Model (CDM) is an open community data standard, designed to standardize the structure and content of observational data and to enable efficient analyses that can produce reliable evidence.

This website is meant to serve as a resource describing the specification of the available versions of the Common Data Model. This includes the structure of the model itself and the agreed upon conventions for each table and field as decided by the OHDSI Community. A central component of the OMOP CDM is the OHDSI standardized vocabularies. The OHDSI vocabularies allow organization and standardization of medical terms to be used across the various clinical domains of the OMOP common data model and enable standardized analytics that leverage the knowledge base when constructing exposure and outcome phenotypes and other features within characterization, population-level effect estimation, and patient-level prediction studies. The vocabulary tables are part of the model and, as such, are detailed here. To download the vocabulary itself, please visit https://athena.ohdsi.org. For more information about the OHDSI suite of tools designed to implement best practices in characterization, population-level effect estimation and patient-level prediction, please visit https://ohdsi.github.io/Hades/.

• https://www.ohdsi.org/data-standardization/
• https://ohdsi.github.io/CommonDataModel/

European Health Data Space Regulation (EHDS)

• Olivér Várhelyi (Commissioner)

• https://health.ec.europa.eu/ehealth-digital-health-and-care/european-health-data-space-regulation-ehds_en

• https://health.ec.europa.eu/events/implementation-dialogue-european-health-data-space-regulation-commissioner-oliver-varhelyi-2026-06-10_en