Abstract
<jats:p>Introduction: Austria is advancing the Austrian Patient Summary (APS) as a standards-based service within its national eHealth infrastructure to support clinical decision-making and EU-level health data exchange. The APS aims to provide a single, consolidated, and up-to-date patient summary by 2029, integrating high-quality structured data from authoritative sources. Methodology: The architecture leverages automated aggregation and a transition to a FHIR-based infrastructure, as demonstrated in a proof of concept. Results: The proof of concept confirmed the feasibility of aggregating APS content from distributed sources and highlighted the need for a push-based approach to ensure predictable response times. Discussion: The APS is designed to become an integral part of routine healthcare, supporting continuity of care and cross-border interoperability.</jats:p>