National Nodes

Local expertise. European impact.

The OHDSI Europe National Nodes form a distributed network of national coordination hubs that bring together local expertise to drive the adoption, implementation, and long‑term sustainability of the OMOP Common Data Model and the wider OHDSI open‑science community across Europe. Operating within the OHDSI Europe Chapter, and in close collaboration with the EHDEN Foundation, the Nodes connect local priorities with European‑level coordination to support trustworthy, reusable health data use.

National Nodes play a unique role: they understand local data, local stakeholders, local coding systems, and local policy environments — and they transform these into interoperable contributions that strengthen the European research ecosystem as a whole.

What National Nodes Do

1

Strengthen national coordination and community building

Each Node brings together hospitals, research institutes, government bodies, SMEs, and other stakeholders to grow national OMOP adoption and analytical capacity. They provide an accessible entry point for newcomers, organize community events, and help institutions find the right expertise.

2

Support OMOP implementation and data partner onboarding

Nodes play an essential role in helping new partners begin their OMOP journeys—supporting ETL development, improving data quality, aligning vocabularies, and enabling participation in national studies.

3

Foster participation in international studies

Many Nodes actively contribute to multinational initiatives such as DARWIN EU and OHDSI network studies, fostering collaboration, co‑leading methodology development, and driving real‑world evidence generation.

4

Expand into new analytical and research domains

Many Nodes now support advanced and emerging use cases, including:

Oncology and disease‑specific clinical networks
Genomics and molecular data integration
PROMs and patient‑reported outcomes
Federated and privacy‑preserving analytics
Operational and clinical applications of OMOP
National training and education programs

5

Bridge local practice with European policy

National Nodes are emerging as important interlocutors in aligning local OMOP experience with evolving European frameworks like the EHDS and shaping sustainable governance models.

National Nodes

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Community Members

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Databases Mapped

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🇪🇺 National Nodes Across Europe

📄 Annual NN Overview Reports

OHDSI Europe National Nodes Overview 2025 (PDF)
OHDSI Europe National Nodes Overview 2024 (PDF)

How National Nodes Are Organized

Each National Node is coordinated by a lead institution, supported by a co‑lead or a national core group. Nodes operate through open, community‑driven principles, with lightweight governance suited to the local context.

As Nodes grow, many are developing more structured models to support sustainable coordination, vocabulary maintenance, and long‑term capacity building.

Why this matters

By linking national efforts, supporting sustainable infrastructure, and amplifying collective expertise, the OHDSI Europe National Nodes turn Europe’s diversity into a strength — ensuring that European contributions fully support the global OHDSI mission.

Annual National Node Reports

OHDSI Europe National Node Annual Overview

The OHDSI Europe National Node Annual Overview provides a structured, comparable summary of each Node’s activities, achievements, challenges, and strategic priorities.

Together, these reports highlight the critical role National Nodes play in:

addressing country‑specific needs,
enabling correct and sustainable OMOP implementation,
supporting participation in national and international research programs, and
surfacing emerging priorities from local ecosystems to the wider European community.

How This Connects to “Why Europe Needs a Coordinating Center”

1

Coordinating Europe’s diversity — National Nodes ensure OMOP is implemented correctly within local coding systems, vocabularies, governance environments, and data structures — while contributing to shared European solutions.

2

Enabling policy and regulatory engagement — Nodes translate European policy (e.g., EHDS) into practical implementation guidance and feed real‑world experience back into the policy process.

3

Strengthening the European OHDSI community — Nodes are the operational backbone of OHDSI Europe — supporting onboarding, training, working groups, and study participation — while the coordinating center connects these efforts into a cohesive European strategy.

By linking national efforts, supporting sustainable infrastructure, and amplifying collective expertise, the OHDSI Europe National Nodes turn Europe’s diversity into a strength — ensuring that European contributions fully support the global OHDSI mission.