ICD-10 Code F02.81 – Dementia in Other Diseases Classified Elsewhere, Unspecified Severity, with Behavioral Disturbance (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F02.81 – Dementia in other diseases classified elsewhere, unspecified severity, with behavioral disturbance
What it is
This code identifies dementia caused by another underlying disease, with the severity not specified, and with behavioral disturbance. Use it when the record links the dementia to a separate condition and notes behavioral symptoms.
Clinical signs
Typical findings include cognitive decline plus behavioral changes such as agitation, aggression, wandering, or hallucinations. Clinical features vary; refer to documentation.
When to use this code
Use F02.81 when the provider documents dementia due to another disease, but does not specify mild, moderate, or severe, and also documents behavioral disturbance. The underlying cause should be coded separately when required. Confirm that the behavior is part of the dementia diagnosis, not a separate psychiatric condition.
Do not use for
Do not use this code for dementia without behavioral disturbance or when the severity is specified elsewhere. Do not use it if the chart does not link the dementia to an underlying disease; check documentation.
Coding tip
Verify both elements: unspecified severity and documented behavioral disturbance, then code the underlying disease first when applicable.