HypEHR: Hyperbolic Modeling of Electronic Health Records for Efficient Question Answering

HypEHR is a compact Lorentzian model utilizing hyperbolic geometry to address Electronic Health Record (EHR) question answering, overcoming cost and hierarchical structure challenges of LLM-based methods. It is pretrained for next-visit diagnosis prediction and alignment with medical ontologies, achieving LLM-comparable performance with significantly fewer parameters.