The Applications of Large Language Models in Mental Health: Scoping Review
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Abstract
Background: Mental health is emerging as an increasingly prevalent public issue globally. There is an urgent need in mental health for efficient detection methods, effective treatments, affordable privacy-focused health care solutions, and increased access to specialized psychiatrists. The emergence and rapid development of large language models (LLMs) have shown the potential to address these mental health demands. However, a comprehensive review summarizing the application areas, processes, and performance comparisons of LLMs in mental health has been lacking until now. Objective: This review aimed to summarize the applications of LLMs in mental health, including trends, application areas, performance comparisons, challenges, and prospective future directions. Methods: A scoping review was conducted to map the landscape of LLMs’ applications in mental health, including trends, application areas, comparative performance, and future trajectories. We searched 7 electronic databases, including Web of Science, PubMed, Cochrane Library, IEEE Xplore, Weipu, CNKI, and Wanfang, from January 1, 2019, to August 31, 2024. Studies eligible for inclusion were peer-reviewed articles focused on LLMs’ applications in mental health. Studies were excluded if they (1) were not peer-reviewed or did not focus on mental health or mental disorders or (2) did not use LLMs; studies that used only natural language processing or long short-term memory models were also excluded. Relevant information on application details and performance metrics was extracted during the data charting of eligible articles. Results: A total of 95 articles were drawn from 4859 studies using LLMs for mental health tasks. The applications were categorized into 3 key areas: screening or detection of mental disorders (67/95, 71%), supporting clinical treatments and interventions (31/95, 33%), and assisting in mental health counseling and education (11/95, 12%). Most studies used LLMs for depression detection and classification (33/95, 35%), clinical treatment support and intervention (14/95, 15%), and suicide risk prediction (12/95, 13%). Compared with nontransformer models and humans, LLMs demonstrate higher capabilities in information acquisition and analysis and efficiently generating natural language responses. Various series of LLMs also have different advantages and disadvantages in addressing mental health tasks. Conclusions: This scoping review synthesizes the applications, processes, performance, and challenges of LLMs in the mental health field. These findings highlight the substantial potential of LLMs to augment mental health research, diagnostics, and intervention strategies, underscoring the imperative for ongoing development and ethical deliberation in clinical settings.
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Existing reviews and meta-analyses of LLM-CBs for mental health focus on applications of LLM-CBs as clinical intervention tools, often under research-protocol conditions.
“Although reviews and meta-analyses of LLM-CBs for mental health exist13,14,29,30, as well as scoping reviews on the implementation of LLM-CBs in mental health31,32, their focus is narrowed to applications of LLM-CBs as clinical intervention tools.”
From A scoping review on the mental health harms of LLM-based chatbots (2026) · cites this paper as [32]
The Results section (Categorization of Studies Based on Mental Health Applications; page unavailable) says this scoping review covers screening and detection, clinical treatment and intervention, and counseling and education. Screening or detection appears in 67 of 95 studies, versus 31 of 95 for treatment and intervention, contrary to the claim that the review's focus is narrowed to clinical intervention tools. The cited passages do not establish the additional characterization about research-protocol conditions. (LLM, conf=0.89)
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Cited by
Sorted by citations
A scoping review on the mental health harms of LLM-based chatbots
Diel, A., Torous, J., Cuijpers, P., Kleesiek, J., Nensa, F., Weber, N., Faust, F., Lalgi, T. J., Mellis, F. S., Teufel, M., et al. (2026) · npj Digital Medicine · doi:10.1038/s41746-026-03054-x · Cited by 4 · see citing works
“Although reviews and meta-analyses of LLM-CBs for mental health exist 13,14,29,30 , as well as scoping reviews on the implementation of LLM-CBs in mental health 31,32 , their focus is narrowed to applications of LLM-CBs as clinical intervention tools.”
- Authors
- Jin, Y., Liu, J., Li, P., Wang, B., Yan, Y., Zhang, H., Ni, C., Wang, J., Li, Y., Bu, Y., & Wang, Y.
- Affiliations
- Beijing Normal University (CN)
- South China Normal University (CN)
- Guangdong Polytechnic Normal University (CN)
- ORCID
- Venue
- Journal of Medical Internet Research
- Publisher
- JMIR Publications Inc.
- Published
- 2025-05-05
- Volume
- 27
- Pages
- e69284
- ISSN
- 1438-8871 (ISSN-L)
- PMC
- PMC12089884
- OpenAlex
- W4408437554
- Cited by
- 94
- References
- 14
- Citations by year
- 2026: 72 · 2025: 22
- FWCI
- 18.39
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- cc-by
- Locations
- Journal of Medical Internet Research (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- National Natural Science Foundation of China (72304040, 82201708)
- South China Normal University
- Guangdong Office of Philosophy and Social Science (GD23YXL01)
- National Center for Mental Health (MHSK2024B24)
- Topics
- Social Sciences › Psychology › Social Psychology › Mental Health via Writing
- Health Sciences › Medicine › Health Informatics › Artificial Intelligence in Healthcare and Education
- Social Sciences › Psychology › Applied Psychology › Digital Mental Health Interventions
- Keywords
- large language models, mental health, depression detection, suicide risk prediction, mental disorder screening, mental health counseling, chatbots, LLM performance comparison, access to mental health care
- MeSH terms
- Large Language Models, Mental Disorders, Humans, Language, Mental Health, Natural Language Processing
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