Unspecified Nonorganic Psychosis (F29)
DSM-5-TR: Unspecified Schizophrenia Spectrum and Other Psychotic 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
Overview
Psychosis not otherwise specified. Used when a psychotic disorder is present but there is insufficient information to determine the specific type, or the presentation does not meet criteria for any of the specified psychotic disorder categories.
Classification Boundaries
Includes
- Psychosis NOS
Excludes1 (coded elsewhere)
- Mental disorder NOS (F99)
- Organic or symptomatic psychosis (F09)
Australian Clinical Context
Acceptable as an initial code during assessment. Should be updated to a specific psychotic disorder diagnosis once the clinical picture is clearer.
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. Diagnostic clarification recommended.
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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
Use only temporarily. Review and update the diagnosis as more clinical information becomes available.
Related Diagnostic Codes
ICD-10-AM diagnostic codes commonly associated with the Unspecified Nonorganic Psychosis (F29).
References
- World Health Organization. ICD-10-AM.
- 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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