ICD-10 Code F03.C2 – Unspecified dementia, severe, with psychotic disturbance (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F03.C2 – Unspecified dementia, severe, with psychotic disturbance
What it is
F03.C2 identifies severe dementia when the type is not specified and psychotic disturbance is documented. Use it for advanced cognitive decline with no stated cause, such as Alzheimer disease or vascular dementia.
Clinical signs
Typical findings include major memory loss, disorientation, impaired judgment, and dependence in daily activities. Psychotic features may include hallucinations, delusions, or other disturbed perceptions; clinical features vary, refer to documentation.
When to use this code
Use this code when the record clearly documents severe dementia and also notes psychotic disturbance, but does not identify the dementia type. It fits inpatient, outpatient, or long-term care notes when the clinician describes advanced cognitive impairment with psychosis. If the type is specified, code that condition instead.
Do not use for
Do not use it for mild or moderate dementia, or for dementia without psychotic disturbance. Do not assign it when documentation names a specific dementia subtype and a more specific code is available.
Coding tip
Verify both severity and psychotic disturbance in the provider note before coding, and check documentation if the dementia type is unclear.