Cited by 147Artificial Intelligence in Healthcare and EducationMachine Learning in HealthcareArtificial Intelligence in Healthcare

The DOI matches its Crossref record; 53 of the 53 references it cites were found in a registry or an index; 30 of the 35 sources its claims cite were checked for support.

Enhancing diagnostic capability with multi-agents conversational large language models

Open access

Abstract

Large Language Models (LLMs) show promise in healthcare tasks but face challenges in complex medical scenarios. We developed a Multi-Agent Conversation (MAC) framework for disease diagnosis, inspired by clinical Multi-Disciplinary Team discussions. Using 302 rare disease cases, we evaluated GPT-3.5, GPT-4, and MAC on medical knowledge and clinical reasoning. MAC outperformed single models in both primary and follow-up consultations, achieving higher accuracy in diagnoses and suggested tests. Optimal performance was achieved with four doctor agents and a supervisor agent, using GPT-4 as the base model. MAC demonstrated high consistency across repeated runs. Further comparative analysis showed MAC also outperformed other methods including Chain of Thoughts (CoT), Self-Refine, and Self-Consistency with higher performance and more output tokens. This framework significantly enhanced LLMs' diagnostic capabilities, effectively bridging theoretical knowledge and practical clinical application. Our findings highlight the potential of multi-agent LLMs in healthcare and suggest further research into their clinical implementation.

Overview

AI snapshot

Written from the paper’s full text.

TL;DR

The authors developed a Multi-Agent Conversation (MAC) framework, inspired by clinical multidisciplinary team discussions, to improve LLM diagnosis of rare diseases. Across 302 rare disease cases, MAC outperformed single-agent GPT-3.5 and GPT-4 in diagnostic accuracy and recommended-test helpfulness, with best results using GPT-4 and four doctor agents plus a supervisor.

Key findings

  • In primary consultation, MAC with GPT-4 and four doctor agents achieved 34.11% most-likely-diagnosis accuracy, 48.12% possible-diagnosis accuracy, and 78.26% helpful further-diagnostic-test rate, compared with GPT-4 alone at 19.65%, 34.55%, and 58.17%, respectively.
  • In follow-up consultation, MAC with GPT-4 and four doctor agents achieved 53.86% most-likely-diagnosis accuracy and 67.88% possible-diagnosis accuracy, compared with GPT-4 alone at 37.86% and 59.71%.
  • Optimal MAC performance was observed with four doctor agents and a supervisor agent using GPT-4 as the base model; excluding the supervisor reduced GPT-4 primary-consultation most-likely-diagnosis accuracy from 34.11% to 32.67% and possible-diagnosis accuracy from 48.12% to 45.47%.
  • MAC also outperformed Chain of Thought, Self-Refine, and Self-Consistency across evaluation metrics, and reliability analysis showed moderate agreement (>0.4) in 23 of 28 evaluations and fair agreement (0.35–0.4) in the remaining five. Average cost per case with GPT-4 was $0.12 for primary consultations and $0.17 for follow-up consultations.

Methods

  • The MAC framework was built using AutoGen, with an admin agent presenting patient information, a supervisor agent guiding consensus, and doctor agents discussing diagnoses and tests; conversations ended at consensus or after a maximum of thirteen rounds.
  • The study included 302 rare diseases from 33 categories in Orphanet, selected by normalized weighted random sampling; clinical case reports published after January 2022 were identified from Medline and curated into primary and follow-up consultation scenarios.
  • GPT-3.5, GPT-4, and MAC were evaluated on disease-specific knowledge and diagnostic tasks; subgroup analyses varied base model, number of doctor agents (2–5), supervisor inclusion, and specialty assignment. Outputs were evaluated using GPT-4o with human validation on 302 cases, and analyses included ANOVA/Kruskal–Wallis, chi-square, and Fleiss’ kappa.

Limitations

  • The paper states the sample size was relatively small given the vast number of rare diseases and represents only a preliminary exploration; primary consultation data were manually extracted and may not always reflect actual consultation.
  • The paper notes that model output explanations do not fully capture inherent interpretability, and MAC should be seen as a supportive tool for clinicians rather than a replacement.
  • Evident from the text: the study used published case reports rather than actual human participants, and GPT-3.5 MAC configurations with more than two doctor agents in follow-up consultations were not feasible due to token output limitations.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1038/s41746-025-01550-0

Cites

53 of 53 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Figures

Fig. 1 Process of disease selection and testing. The researchers first identified the rare disease database. Then, they performed normalized weighted random sampling, from which 302 cases were selected. Each case was curated into primary consultation setting and follow-up consultation setting. GPT-3.5, GPT-4, and MAC were tested.
Fig. 1 Process of disease selection and testing. The researchers first identified the rare disease database. Then, they performed normalized weighted random sampling, from which 302 cases were selected. Each case was curated into primary consultation setting and follow-up consultation setting. GPT-3.5, GPT-4, and MAC were tested.CC BY-NC-ND · PubMed Central
Fig. 2 The multi-agent conversation (MAC) framework. The admin agent provides the patient’s information. The supervisor agent initiates and supervises the joint conversation. The three doctor agents jointly discuss the patient’s condition. The final output is provided either when consensus is reached or after a maximum of thirteen rounds of conversation.
Fig. 2 The multi-agent conversation (MAC) framework. The admin agent provides the patient’s information. The supervisor agent initiates and supervises the joint conversation. The three doctor agents jointly discuss the patient’s condition. The final output is provided either when consensus is reached or after a maximum of thirteen rounds of conversation.CC BY-NC-ND · PubMed Central
Fig. 3 Clinical case curation. a Primary consultation represents the initial information acquired from patient in primary care; b Follow-up consultation represents the complete information of patients after relevant diagnostic tests have been performed.
Fig. 3 Clinical case curation. a Primary consultation represents the initial information acquired from patient in primary care; b Follow-up consultation represents the complete information of patients after relevant diagnostic tests have been performed.CC BY-NC-ND · PubMed Central
Fig. 4 Performance on generating disease-specific knowledge. a Inappropriate and incorrect content; b Omission; c Likelihood of possible harm; d Extent of possible harm; e Bias. The bars represent mean values. Error bars indicate standard deviation.
Fig. 4 Performance on generating disease-specific knowledge. a Inappropriate and incorrect content; b Omission; c Likelihood of possible harm; d Extent of possible harm; e Bias. The bars represent mean values. Error bars indicate standard deviation.CC BY-NC-ND · PubMed Central
Fig. 5 Diagnostic performance in primary consultation. a Accuracy of the most likely diagnosis; b Accuracy of the possible diagnoses; c Helpfulness of further diagnostic tests; d Score for the most likely diagnosis; e Score of the possible diagnoses score; f Score of further diagnostic tests. In (a–c), the bars represent percentages. In (d–f), the bars represent mean values and the error bars indicate standard deviation. Statistical values are listed in Supplementary Tables 2 and 3.
Fig. 5 Diagnostic performance in primary consultation. a Accuracy of the most likely diagnosis; b Accuracy of the possible diagnoses; c Helpfulness of further diagnostic tests; d Score for the most likely diagnosis; e Score of the possible diagnoses score; f Score of further diagnostic tests. In (a–c), the bars represent percentages. In (d–f), the bars represent mean values and the error bars indicate standard deviation. Statistical values are listed in Supplementary Tables 2 and 3.CC BY-NC-ND · PubMed Central
Fig. 6 Diagnostic performance in follow-up consultation. a Accuracy of the most likely diagnosis; b Accuracy of the possible diagnoses; c Score for the most likely diagnosis; d Score of the possible diagnoses score. In (a, b), the bars represent percentages. In (c, d), the bars represent mean values and the error bars indicate standard deviation. Statistical values are listed in Supplementary Tables 4 and 5.
Fig. 6 Diagnostic performance in follow-up consultation. a Accuracy of the most likely diagnosis; b Accuracy of the possible diagnoses; c Score for the most likely diagnosis; d Score of the possible diagnoses score. In (a, b), the bars represent percentages. In (c, d), the bars represent mean values and the error bars indicate standard deviation. Statistical values are listed in Supplementary Tables 4 and 5.CC BY-NC-ND · PubMed Central
Fig. 7 Influence of base model and number of doctor agents on multi-agent conversation (MAC). a Accuracy of most likely diagnosis in primary consultation; b Accuracy of possible diagnoses in primary consultation; c Accuracy of most likely diagnosis in further diagnostic test; d Accuracy of most likely diagnosis in follow-up consultation; e Accuracy of possible diagnoses in follow-up consultation. For MAC using GPT-3.5 as the base model, settings with more than 2 doctor agents were not feasible due to token output limitation. The lines indicate percentage.
Fig. 7 Influence of base model and number of doctor agents on multi-agent conversation (MAC). a Accuracy of most likely diagnosis in primary consultation; b Accuracy of possible diagnoses in primary consultation; c Accuracy of most likely diagnosis in further diagnostic test; d Accuracy of most likely diagnosis in follow-up consultation; e Accuracy of possible diagnoses in follow-up consultation. For MAC using GPT-3.5 as the base model, settings with more than 2 doctor agents were not feasible due to token output limitation. The lines indicate percentage.CC BY-NC-ND · PubMed Central
Fig. 8 Influence of output token on performance across each method. a Effect of output token on most likely diagnosis accuracy in primary consultation; b Effect of output token on possible diagnosis accuracy in primary consultation; c Effect of output token on further diagnostic test helpfulness in primary consultation; d Effect of output token on most likely diagnosis accuracy in primary consultation; e Effect of output token on possible diagnosis accuracy in follow-up consultation.
Fig. 8 Influence of output token on performance across each method. a Effect of output token on most likely diagnosis accuracy in primary consultation; b Effect of output token on possible diagnosis accuracy in primary consultation; c Effect of output token on further diagnostic test helpfulness in primary consultation; d Effect of output token on most likely diagnosis accuracy in primary consultation; e Effect of output token on possible diagnosis accuracy in follow-up consultation.CC BY-NC-ND · PubMed Central

Verification

Claims the paper makes

26 Own result · 24 Own method · 13 Own interpretation · 12 Supported · 11 No basis given · 9 Partly supported · 2 No full text of the sources · accuracy not yet measured

Show all 33 claims

  • Probably not a substantial claim. 49
  • It may state two separate claims as one. 29
  • The quote only partly states this claim. 1
64 of 64
  • The paper relies on this without support.

    The curated clinical cases simulate real-world clinical consultations and are representative of real clinical practice.

    “was tested on curated clinical cases simulating real-world clinical consultations (Fig. 3).”
  • The paper relies on this without support.

    The evaluation metrics (accuracy of most likely diagnosis, possible diagnoses, helpfulness of further diagnostic tests) validly measure diagnostic capability.

    “MAC significantly outperformed single-agent models GPT-3.5 and GPT-4 in terms of diagnostic accuracy and helpfulness of further recommended test in both primary and follow-up consultation.”
  • The paper relies on this without support.

    The rare disease cases sampled are representative of rare diseases generally.

    “This study included 302 kinds of rare disease from 33 different disease categories.”
  • The paper relies on this without support.

    The multi-agent conversation framework’s consensus output reflects a correct or clinically useful diagnostic process analogous to a real multi-disciplinary team discussion.

    “different agents can simulate the collaborative nature of a medical team, simulating a Multi-Disciplinary Team (MDT) discussion that is commonly adopted in clinical practice to solve complex medical tasks.”
  • The paper relies on this without support.

    GPT-3.5-turbo and GPT-4 are commonly tested for medical purposes.

    “GPT-3.5-turbo and GPT-4 are commonly tested for medical purposes and were selected as the base model for the Multi-Agent Conversation Framework (MAC).”
  • The paper relies on this without support.

    LLMs are unlikely to surpass human capabilities in domains requiring extensive medical knowledge and sophisticated analytical skills in the short term.

    “it is unlikely that LLMs will surpass human capabilities in domains requiring extensive medical knowledge and sophisticated analytical skills in the short term.”
6 of 6

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Citations

Cites

Show all 40 references

Research works printed but not linked: 2

  1. Smit, A., Duckworth, P., Grinsztajn, N., Barrett, T. & Pretorius, A. Are we going MAD? Benchmarking Multi-Agent Debate between Language Models for Medical Q&A. In: Deep Generative Models for Health Workshop NeurIPS 2023) (NeurIPS, 2023).
  2. Pal, A., Umapathi, L. K. & Sankarasubbu, M. Medmcqa: A large-scale multi-subject multi-choice dataset for medical domain question answering. In: Conference on Health, Inference, and Learning) (PMLR, 2022).

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Metadata

Authors
Chen, X., Yi, H., You, M., Liu, W., Wang, L., Li, H., Zhang, X., Guo, Y., Fan, L., Chen, G., Lao, Q., Fu, W., Li, K., & Li, J.
Affiliations
  • Sichuan University (CN)
  • First Affiliated Hospital Zhejiang University (CN)
  • Beijing University of Posts and Telecommunications (CN)
Corresponding author
  • Fu, Weili
  • Li, Kang
  • Li, Jian
Venue
npj Digital Medicine
Published
2025-03-13
Volume
8
Issue
1
Pages
159-159
ISSN
2398-6352 (ISSN-L)
OpenAlex
W4408411093
Cited by
147
References
40
Citations by year
2026: 114 · 2025: 33
FWCI
27.84
Type
journal article
Language
en
Open access
Locations
  • npj Digital Medicine (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Health Sciences › Medicine › Health Informatics › Artificial Intelligence in Healthcare and Education
  • Physical Sciences › Computer Science › Artificial Intelligence › Machine Learning in Healthcare
  • Health Sciences › Health Professions › Health Information Management › Artificial Intelligence in Healthcare
Keywords
multi-agent LLM systems, disease diagnosis, rare diseases, clinical reasoning, GPT-4, clinical decision support

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