OHDSI Netherlands – National Node
Local Collaboration. European Impact.
OHDSI NL aims to advance observational health research on a national level using the OMOP CDM and the OHDSI toolkits, as a common foundation. OHDSI NL currently consists of members from academia, research institutions, hospitals, pharma companies and SMEs. Our OMOP & OHDSI expertise ranges from harmonizing data to the OMOP CDM, running studies, writing packages for methods development. Our members vary from health care providers to data specialists with secondary data use as common ground.
If you are curious about what OMOP CDM is, OHDSI NL can help you get started on your OHDSI journey!
Community Snapshot
100+
Mailing list subscribers
80+
LinkedIn followers
8
Data partners
3
OKR working groups
Objectives
- Create a national community where we can learn from each other by sharing knowledge and support (cross-institutional) observational research.
- Identify and align potential research opportunities in the Netherlands.
- Generate national level evidence using OHDSI tools and methodologies.
- Generate exposure of OHDSI within the Dutch health research world.
- Align mapping pipelines for Dutch vocabularies.
- Maintain an overview of national data partners & data sets mapped to the OMOP CDM.
- Connect and support data holders to map their data to the OMOP CDM.
- Contribute to international network studies as a national representativeSurface Belgian needs and opportunities within the OHDSI Europe community and policy discussions such as EHDS.
Gallery
Focus areas
OKR working groups
- Positioning of OHDSI NL in the broader ecosystem
- Standard analytics to support the use of Patient-Reported Outcomes (PROMs) using OMOP
- Supporting data holders in NL to map to the OMOP CDM
Notable achievements
- OHDSI NL study-a-thon, Assessment of stakeholder needs, Overview of mappings and data in NL
- Connecting with and organizing workshops for diverse stakeholders
- Launch of an OHDSI NL 'Smoelenboek' to find members with specific expertise in the Netherlands
- Member involvement in many (inter)national consortia using OMOP
How to join OHDSI Netherlands?
Governance
- Lead Institution: Erasmus University Medical Center
- Node Leads: ✉ Renske Los & ✉ Aniek Markus, Department of Medical Informatics
Together with our members we build a national community where members can learn by sharing knowledge, provide support for organizations to get started or take the next steps in their OHDSI journey, and contribute to advancing OHDSI and OMOP studies across the Netherlands.
Request to be added to the mailing list:
OHDSI NL Sign Up FormJoin the OHDSI Community and sign up for Teams Environment:
Get InvolvedFollow the National Node on LinkedIn to stay informed:
OHDSI NL LinkedInParticipate in our quartely F2F meetings and national events.
Activities
Upcoming events
- OHDSI NL F2F Meeting "Patient-Reported Outcomes in OMOP" - Thursday, February 5, 2026 at 12:30-16:00 - Astellas, Leiden
- OHDSI NL F2F Meeting "OHDSI NL in relation to broader ecosystem" - Sunday, April 19, 2026 at 9:30-11:30 - Erasmus MC, Rotterdam (OHDSI EU Symposium)
- OHDSI NL F2F Meeting "Vocabularies and Mapping in NL" - Tuesday, September 8, 2026 at 12:30-16:00 - TBD
- OHDSI NL Day (open event to learn more about OHDSI - more information will follow) - Thursday, October 1, 2026 - Erasmus MC, Rotterdam
- OHDSI NL F2F Meeting "Wrapping Up 2027 & Looking Forward to 2027" - Tuesday, December 1, 2026 at 12:30-16:00 - TBD
Why join?
- Data holders: becoming an OHDSI NL Data Holder offers a chance to engage in network studies that advance science, generate evidence, and foster progress in Dutch health data and beyond. OHDSI NL can help to learn more about standardizing your data to the OMOP CDM, to reuse existing Dutch mappings and work together on mapping harmonization, to find members with (tooling) expertise, to collaborate in (inter)national network studies.
- Data users: becoming an OHDSI NL Member allows to learn more about data standardization, analytics, and open-source tooling. OHDSI NL provides the opportunity to learn from experts in OHDSI, connect to others with data in OMOP CDM format, join multidisciplinary research collaborations, work together to advance the OMOP CDM and tooling.
Connect to OHDSI NL online or join our upcoming events to get to know us and learn what OHDSI NL is all about.