Context-Dependent FHIR Serialisation Strategies for Clinical LLM Deployment: A Multi-Layer Benchmark on UK Core Data
This work presents FHIRBench-UK, evaluating five large language models across six serialisation formats and three clinical tasks on 100 UK Core FHIR patient bundles, and recommends task-aware serialisation routing as a zero-cost quality intervention for NHS FHIR-based LLM deployments.