This report quantifies cross-border health data governance in Europe (2025–2030), centered on GDPR, the European Health Data Space (EHDS), NIS2, eIDAS 2.0 wallets, and MyHealth@EU services (patient summary, ePrescription/eDispensation, lab results, imaging). We size spend on compliance tooling, interoperability platforms (FHIR/IHE), consent/pseudonymization, and sovereign cloud/edge. Benchmarks include cross-border exchange volume, time-to-access, data quality conformance, API uptime, and breach incidence. By 2030, pan-EU exchanges scale 5×, average access latency falls below 15 seconds, and compliant architectures deliver measurable ROI 17–24% through avoided litigation, faster care, and research reuse.