Patient Identity as the Foundation: Why Architecture Matters in Healthcare Systems

Duplicate patient records in healthcare platforms create safety-critical failures that ripple through clinical workflows, yet this problem stems from treating patient identity as an afterthought rather than foundational architecture. Establishing FHIR's Patient resource as the aggregate root with a single internal UUID mapped to external identifiers solves this before REST endpoints proliferate. This architectural discipline proves essential because healthcare's safety requirements cannot tolerate post-hoc deduplication—the foundation must be right on day one.