European OHDSI Symposium 2026
Continuous Collaboration for Living Evidence Generation
Join the European OHDSI community in Rotterdam for a high-impact gathering focused on OMOP CDM, open-source analytics, tool development, evidence generation, collaborative research, and real-world networking across Europe.
Annual Symposium
Continuous collaboration, European scale, real-world evidence
OHDSI’s mission is to improve health by empowering a community to collaboratively generate the evidence that promotes better health decisions and better care. The European symposium provides a platform to share results and ideas about OMOP CDM, tool development, and future research across the continent.
The 2026 symposium in Rotterdam will include collaborator showcases, posters, podium presentations, and interactive demonstrations of OHDSI’s open-source tools. The day includes updates from national nodes, large European projects, and other initiatives, along with significant time reserved for networking and newcomer engagement.
The main symposium is on April 20, 2026 aboard the SS Rotterdam, while workshops and workgroup meetings take place on April 18–19, 2026 at the Erasmus University Medical Center Education Centre.
SS Rotterdam: directions main symposium.
Erasmus MC: directions weekend program.
A look back at previous European symposia
Workshops, tutorials, symposium day, and networking
Weekend Workshops & Tutorials
The weekend program on April 18–19, 2026 is dedicated to workshops and workgroup meetings and is included with symposium registration.
Main Symposium Day
The symposium day on Monday, April 20, 2026 features sessions focused on evidence generation, European initiatives, tool development, and collaborative discussion.
Reserve your place at Symposium 2026
Attendance is €195 (regular) or €65 (students), and the ticket also covers the workshops and workgroup meetings at no additional cost. Registration closes on April 3, 2026.
Show your work: posters, demos, and lightning talks
OHDSI Europe accepts submissions for posters and software demonstrations to be presented during collaborator showcases. Selected authors may also be invited to present in a lightning or rapid-fire session.
- Abstracts must show a connection to OHDSI and relevance to Europe.
- Submissions are not limited to finished research; future OMOP-CDM plans are also welcome.
- Topics include data management, analytics infrastructure, methodology, evidence generation, and applications.
Important dates
- February 6, 2026: Deadline for abstract submissions
- February 20, 2026: Notification of acceptance and lightning talk selection
- April 3, 2026: Registration deadline
- April 20, 2026: European OHDSI Symposium in Rotterdam
Support the symposium
Learn about packages, visibility opportunities, and ways to support the European OHDSI community.
Stay close, arrive smoothly, and enjoy Rotterdam
Please note that registration to the European OHDSI Symposium only covers your attendance. All travel and accommodation arrangements are the responsibility of each participant.Special arrangement
A special arrangement has been made with SS Rotterdam for accommodation. Please use the link below to book with a 10% discount for their Superior Room including breakfast buffet:
Local tips
For restaurants suggestions: Click here.
Questions?
If you have further questions about the symposium, contact