Can Post-Training Turn LLMs into Good Medical Coders? An Empirical Study of Generative ICD Coding

In three linesEmpirical study on post-training adaptation of LLMs for ICD (International Classification of Diseases) coding. Authors compare prompting, supervised fine-tuning, and reinforcement learning (GRPO), introduce PHI (diagnostic curriculum), and show SFT + GRPO outperform discriminative baselines. Code and checkpoints released.

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