NHS Outpatient Referral System — FHIR R4 Integrated

NHS e-Referral Service (eRS) Integration: NHS eRS API integration for: referral request creation, appointment slot retrieval, patient pathway tracking, and RAG (Referral Advice and Guidance) workflow. NHS Smartcard authentication for clinical staff. NHS RBAC (Role-Based Access Control) — only authorised clinical roles can access patient referral data. FHIR R4 Patient Matching: NHS Spine PDS (Personal Demographics Service) FHIR R4 API for patient matching: NHS Number verification, patient demographic retrieval. GP Connect FHIR R4 for GP clinical data access. UK Core FHIR R4 profiles: Patient, Appointment, ServiceRequest resources. DTAC All 5 Domains: Domain 1: Clinical Safety Officer appointed, DCB0129 compliant, Hazard Log maintained. Domain 2: DSP Toolkit Standards Met. Domain 3: Cyber Essentials Plus, CREST pen test. Domain 4: FHIR R4 UK Core compliant. Domain 5: WCAG 2.1 AA, user research with 28 clinical staff. RAG Workflow: Referral Advice and Guidance: structured question form (replacing free-text email), specialist assignment algorithm (specialty + geography + capacity), response SLA tracking (24-hour target), GP notification via NHS Notify, and clinical audit trail.