XpanDH is a CSA aimed at mobilizing and building capacity in individuals and organisations to create, adapt and explore purposeful use of interoperable digital health solutions based on a shared adoption of the European Electronic Health Records Exchange format (EEHRxF) across Europe. This pan-European effort will use a “network-of-networks” approach ensuring that digital health actors are motivated and supported by tailored guidance and real examples to help early adopters to advance to the concrete use of EEHRxF-embedded digital health solutions to add value to health and care and promote Personal and European Health Data Spaces. XpanDH pursues the main goal of maturing and accelerating a sustainable and scalable interoperability environment for digital health innovations based on the EEHRxF, around 5 Goals: 1) To develop robust technical specifications and resources for the EEHRxF building; 2) To establish the X-Bundle Readiness model; 3) To verify the usefulness of the X-Bundle in real-world with a set of early adopters grouped under selected adoption domains; 4) To mature a pan-European digital health ecosystem of solution providers and end-users, 5) To develop a framework for sustainable ecosystem. The consortium will thrive on past and ongoing eHealth interoperability projects and services, and particularly on the X-eHealth and DigitalHealthEurope projects recommendations, through digital health data activism and strong patient engagement. It brings together 26 Digital Health Actors under a co-creation and co-implementation concept, supported by a Policy Board (linking to Governments and the eHealth Network). To expand its impact, 10 XpandDH networks of hundreds of health stakeholders will be nurtured to form a vibrant pan-European (Digital) Health space converging on common, usable, and reliable tools for real interoperable services that adoption of the EEHRxF and enhance healthcare cooperation for better health towards a European Health Union.