MedExAgent: Training LLM Agents to Ask, Examine, and Diagnose in Noisy Clinical Environments
Researchers introduce MedExAgent, an AI system trained to perform clinical diagnosis through a POMDP framework that simulates real-world complexity including patient interaction, medical exams, and noisy data. The model uses supervised finetuning and reinforcement learning to balance diagnostic accuracy with cost-efficiency, achieving performance comparable to larger models while maintaining practical clinical constraints.