Induced Delusional Disorder (F24)
DSM-5-TR: Delusional Symptoms in Partner of Individual with Delusional Disorder
ICD-10-AM and DSM-5-TR may classify conditions differently. Refer to APA and WHO for complete diagnostic criteria.
Key Facts
ICD-10 Range
F20-F29
Australian Prevalence
Very rare. Exact prevalence unknown.
Global Prevalence
Very rare. Reported primarily in case reports and small series.
Overview
A delusional disorder shared by two or more people with close emotional links. Only one of the people has a genuine psychotic disorder; the delusions are induced in the other(s) and usually disappear when the people are separated. The psychotic illness in the dominant person is most commonly schizophrenic but this is not necessarily the case.
Classification Boundaries
Includes
- Folie à deux
- Induced paranoid disorder
- Induced psychotic disorder
Australian Clinical Context
Rare in Australian clinical practice. Treatment primarily involves separation of the affected individuals and treatment of the primary case.
Medicare (MBS) Pathways
Better Access to Mental Health Care
The primary Medicare pathway for mental health treatment in Australia. Requires a GP Mental Health Treatment Plan (MHTP) referral. Available for any clinically diagnosed mental disorder.
| Provider Type | MBS Items | Session Type |
|---|---|---|
| Clinical Psychologist | 80000–80025 | Psychological therapy (higher rebate) |
| Registered Psychologist | 80100–80123 | Focused psychological strategies |
| Occupational Therapist | 80125–80145 | Focused psychological strategies |
| Social Worker | 80150–80175 | Focused psychological strategies |
| Psychiatrist | 291, 296–299, 300–308 | Psychiatric consultation |
Clinical Psychologist
Registered Psychologist
Occupational Therapist
Social Worker
GP referral items: 2700, 2701, 2715, 2717
Eligibility: Any clinically diagnosed mental disorder as defined by WHO ICD-10 Chapter V. Requires a GP or psychiatrist referral.
Exclusions:
- Intellectual disability (use Complex Neurodevelopmental Disorder pathway or specialist referral)
- Dementia and organic mental disorders (use specialist referral pathway)
- Tobacco use disorder
Psychiatrist-led care is the primary pathway.
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Reference information sourced from MBS Online (mbsonline.gov.au). Item availability, rebates, and eligibility criteria may change. This is not billing advice — always verify current items before claiming. Last verified: April 2026.
Clinical Documentation Notes
DSM-5-TR no longer has a specific diagnosis for this — it is classified under "Other Specified Schizophrenia Spectrum and Other Psychotic Disorder." Document the relationship between the individuals and which person has the primary psychotic disorder.
Related Diagnostic Codes
ICD-10-AM diagnostic codes commonly associated with the Induced Delusional Disorder (F24).
References
- World Health Organization. ICD-10-AM.
- American Psychiatric Association. DSM-5-TR. 2022.
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This tool calculates scores based on published guidelines for professional reference. It does not provide clinical diagnoses. Scores are provided as reference information only and should be interpreted by a qualified practitioner in the context of a comprehensive assessment.
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