Organic Amnesic Syndrome Not Induced by Alcohol or Other Psychoactive Substances (F04)
DSM-5-TR: Major Neurocognitive Disorder (Amnestic Type)
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
F00-F09
Overview
Syndrome of prominent impairment of recent and remote memory while immediate recall is preserved, with reduced ability to learn new material and disorientation in time. Not due to alcohol or other psychoactive substances.
Classification Boundaries
Includes
- Korsakov's psychosis or syndrome (nonalcoholic)
Excludes1 (coded elsewhere)
- Alcohol-induced Korsakov's syndrome (F10.6)
- Amnesia NOS (R41.3)
- Dissociative amnesia (F44.0)
Australian Clinical Context
Causes include thiamine deficiency (non-alcoholic), herpes encephalitis, hypoxic brain injury, and bilateral hippocampal lesions. Distinguish from alcohol-induced Korsakoff syndrome.
Medicare (MBS) Pathways
Specialist Referral Pathway
Conditions in this category do not have a structured allied health Medicare pathway. Treatment is typically managed through specialist psychiatrist or physician consultations, with additional support through state/territory services or NDIS.
| Provider Type | MBS Items | Session Type |
|---|---|---|
| Psychiatrist | 291, 296–299, 300–308 | Psychiatric consultation |
| Geriatrician / Physician | Standard specialist consultation items | Specialist medical consultation |
Geriatrician / Physician
GP referral items: Standard GP referral to specialist
Eligibility: Referral to specialist required. No structured allied health pathway under Medicare for these conditions.
Not covered by Better Access. Specialist neuropsychiatry or neurology pathways apply.
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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
Distinguish from dissociative amnesia (psychogenic) and from dementia by the relative preservation of other cognitive functions. Confabulation may be present.
Related Diagnostic Codes
ICD-10-AM diagnostic codes commonly associated with the Organic Amnesic Syndrome Not Induced by Alcohol or Other Psychoactive Substances (F04).
References
- World Health Organization. ICD-10-AM.
- American Psychiatric Association. DSM-5-TR. 2022.
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