Interoperability and Trusted Data Exchange: TEFCA/FHIR Readiness for Connected Health Ecosystems

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The increasing complexity of medical data exchange necessitates shared infrastructure based on 'common rules,' moving beyond simple point-to-point connections. TEFCA (Trusted Exchange Framework and Common Agreement) is presented as a national framework—a 'rule of the road'—defining who can, for what purposes, exchange health information. It aims to reduce fragmentation by enabling trust-based exchange. While FHIR provides the technical mechanism for exchanging structured clinical data, TEFCA supplies the crucial 'trust and policy layer,' determining how and when that exchange occurs. Both are required; one cannot function without the other. This combination standardizes expectations around access, consent, and accountability. The article highlights common failure points in practice: not just technical issues, but governance and operational challenges such as patient identification (difficulty matching records), consent management (enforcing granularity and revocation across networks), and data quality (incomplete fields or inconsistent coding). Furthermore, 'accountability gaps'—unclear responsibility when data is delayed or misused—are major barriers to adoption. TEFCA raises the baseline expectations for vendors, shifting interoperability from an optional, bespoke integration requirement to a core capability tied to trust and scale. Vendors must move away from one-off connections toward network participation with defined roles and responsibilities.