Is There a Dr. House in the Machine? Towards Clinical and Diagnostic Reasoning in LLM-based Medical Agents

Azmine Toushik Wasi, Abdur Rahman, Riashat Islam, Md Rizwan Parvez


Abstract
Large language models (LLMs) are increasingly used in agentic systems that reason over multiple steps, call tools, and interact with clinical knowledge sources. This survey examines whether LLM-based medical agents approximate expert diagnostic reasoning or reproduce its outputs without its causal and epistemic foundations. We organize agent design along five axes: reasoning paradigms, agent architectures, tool use, degree of autonomy, and embodiment. We then analyze learning and adaptation, evaluation, safety, and deployment as cross-cutting concerns that interact with these axes. Drawing on research in machine learning, biomedical informatics, and clinical AI, we examine how design choices shape diagnostic reliability and failure modes, and identify requirements for clinical and medical agents.
Anthology ID:
2026.findings-aacl.82
Volume:
Findings of the Association for Computational Linguistics: IJCNLP-AACL 2026
Month:
November
Year:
2026
Address:
Hengqin, China
Editors:
Yue Zhang, Ruifeng Xu, Ayu Purwarianti, Tong Rong, Jun Suzuki
Venue:
Findings
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
1632–1667
Language:
URL:
https://aclanthology.org/2026.findings-aacl.82/
DOI:
Bibkey:
Cite (ACL):
Azmine Toushik Wasi, Abdur Rahman, Riashat Islam, and Md Rizwan Parvez. 2026. Is There a Dr. House in the Machine? Towards Clinical and Diagnostic Reasoning in LLM-based Medical Agents. In Findings of the Association for Computational Linguistics: IJCNLP-AACL 2026, pages 1632–1667, Hengqin, China. Association for Computational Linguistics.
Cite (Informal):
Is There a Dr. House in the Machine? Towards Clinical and Diagnostic Reasoning in LLM-based Medical Agents (Wasi et al., Findings 2026)
Copy Citation:
PDF:
https://aclanthology.org/2026.findings-aacl.82.pdf