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Welcome to OHDSI!
The Observational Health Data Sciences and Informatics (or OHDSI, pronounced "Odyssey") program is a multi-stakeholder, interdisciplinary collaborative to bring out the value of health data through large-scale analytics. All our solutions are open-source.
OHDSI has established an international network of researchers and observational health databases with a central coordinating center housed at Columbia University.
Read more about us, about our goals, and how you can help support the OHDSI community.
Join us at the 2026 OHDSI Global Symposium
Join us Oct. 20-22 for the 2026 OHDSI Global Symposium in New Brunswick, NJ. This event unites hundreds of collaborators to showcase scientific innovations and build bridges for future research. Together, we are advancing our mission to generate real-world evidence that informs better health decisions and improves patient care. Our Collaborator Showcase call for participation opens soon—stay tuned for updates on our event homepage.
