ClinicalBench: Stress-Testing Assertion-Aware Retrieval for Cross-Admission Clinical QA on MIMIC-IV

This paper introduces ClinicalBench, a 400-question benchmark designed to stress-test assertion-aware retrieval for cross-admission clinical QA on MIMIC-IV using real EHR notes. It also presents EpiKG, a patient knowledge graph system that incorporates assertion and temporality tags to route retrieval by question intent, demonstrating significant performance improvements across various LLMs.