Persistent Delusional Disorders (F22)
DSM-5-TR: 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
Subcodes
3 subcodes
Australian Prevalence
Prevalence approximately 0.02-0.03%. More commonly diagnosed in older adults.
Global Prevalence
Lifetime prevalence approximately 0.2%. Late onset is typical.
Overview
A group of disorders in which long-standing delusions constitute the only, or the most conspicuous, clinical characteristic and which cannot be classified as organic, schizophrenic, or affective. Delusional disorder is the most common subtype.
ICD-10-AM Subcodes
| Code | Name | Description |
|---|---|---|
| F22.0 | Delusional disorder | |
| F22.8 | Other persistent delusional disorders | |
| F22.9 | Persistent delusional disorder, unspecified |
Classification Boundaries
Includes
- Delusional disorder
- Paranoia
- Paraphrenia (late)
- Sensitiver Beziehungswahn
Excludes1 (coded elsewhere)
- Paranoid schizophrenia (F20.0)
- Paranoid personality disorder (F60.0)
- Paranoid psychosis, psychogenic (F23)
- Paranoid reaction (F23)
Australian Clinical Context
Persistent delusional disorders are managed by psychiatrists in Australia. Treatment involves antipsychotic medication and psychological therapy. The condition can be difficult to treat as patients often lack insight.
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 specifies subtypes: erotomanic, grandiose, jealous, persecutory, somatic, mixed, and unspecified. Document the specific delusional theme, duration, and impact on functioning.
Related Diagnostic Codes
ICD-10-AM diagnostic codes commonly associated with the Persistent Delusional Disorders (F22).
References
- World Health Organization. ICD-10-AM.
- RANZCP. Clinical Practice Guidelines for the Management of Schizophrenia and Related Disorders.
- American Psychiatric Association. DSM-5-TR. 2022.
Clinical Scoring Calculator — Not a Diagnostic Tool
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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