HealthNLP_Retrievers at ArchEHR-QA 2026 (CL4Health @ LREC) 🏥

Our system paper for the ArchEHR-QA 2026 shared task is on arXiv:2604.26880! The task: answer clinical questions grounded in real EHR notes — the answers must be traceable to exact evidence spans in the record, not hallucinated. Our pipeline cascades a retriever (to pull relevant note sections) with an LLM reader (to extract and ground the answer), keeping the full chain verifiable. A foray into clinical NLP — very different from my usual FL work but fascinating from a retrieval-augmentation and faithfulness angle.