ICD-10 Code F01.C1 – Vascular Dementia, Severe, with Behavioral Disturbance (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F01.C1 – Vascular dementia, severe, with behavioral disturbance
What it is
Use this code for severe vascular dementia caused by cerebrovascular disease, with documented behavioral disturbance. It indicates major cognitive decline from vascular injury, plus behavior changes that affect care.
Clinical signs
Typical findings include significant memory and executive dysfunction, impaired judgment, and loss of independence. Behavioral disturbance may include agitation, aggression, wandering, or other disruptive behaviors; clinical features vary, refer to documentation.
When to use this code
Assign F01.C1 when the provider documents severe vascular dementia and clearly links it to behavioral disturbance. Use it when the record supports both the dementia severity and the presence of behavior changes. Check documentation if severity or behavior is not specified.
Do not use for
Do not use this code for vascular dementia without behavioral disturbance, or when the dementia type is not confirmed as vascular. Do not assume behavior problems alone establish this diagnosis.
Coding tip
Code only when the chart explicitly documents both severe vascular dementia and behavioral disturbance.