Observational Health Data Sciences and Informatics (OHDSI, pronounced “Odyssey”) is a global community of researchers and healthcare professionals who collaboratively strive to promote better health decisions and care through globally standardized health data and continuously developing large-scale analytics.

OHDSI is a growing collaborative of more than 3,200 researchers across disciplines, stakeholders, and geographies. OHDSI has established an international distributed data network that applies one open community data standard and collectively contains data for more than 928 million patients around the world.

The OHDSI community developed and uses the OMOP Common Data Model, an open-source platform for observational research. This data model allows for the standardization of health data from various sources, allowing the analysis of large datasets from multiple sources in a consistent and reproducible manner. OHDSI has also produced a suite of open-source software packages that enables the community to translate that data into reliable evidence.

OHDSI collaborates to establish open community data standards, develop open-source software, conduct methodological research, and apply best practices across the OHDSI data network to generate clinical evidence. Our community research has been presented across various scientific societies, published in top medical journals, and impacted policy decisions within multiple regulatory agencies. Our growing global community is always seeking new collaborators. We hope you are interested to Join The Journey!