@inproceedings{chiewhawan-etal-2026-lamar,
    title = "{LAMAR} at {M}ed{E}x{ACT} 2026: Agreement-Driven Large Language Model Ensembles for Clinical Decision Extraction from Discharge Summaries",
    author = "Chiewhawan, Monrada  and
      Limaroon, Keetawan  and
      Achakulvisut, Titipat",
    editor = "Gupta, Deepak  and
      Demner-Fushman, Dina",
    booktitle = "Proceedings of the {B}io{NLP} 2026 (Shared Tasks)",
    month = jul,
    year = "2026",
    address = "San Diego, California, USA",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest-acl-workshops/2026.bionlp-2.25/",
    pages = "179--190",
    ISBN = "979-8-89176-435-4",
    abstract = "This paper presents an ensemble of Qwen3.5-4B language models for extracting medical decisions from discharge summaries in the MedDec dataset. The models were trained to annotate discharge summaries with inline XML-like tags. Three different training strategies were used including dynamic fine-tuning, reinforcement learning, and pseudo-label augmentation. By combining predictions based on inter-model agreement, the system improved performance across evaluation metrics, achieving an overall F1 of 0.5942 and ranking second on the test leaderboard. The results also showed stable performance across demographic groups, suggesting fairness for underrepresented populations."
}