ICD-10 Code F01.C11 – Vascular dementia, severe, with agitation (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F01.C11 – Vascular dementia, severe, with agitation
What it is
This code identifies severe vascular dementia, a major decline in memory and thinking caused by vascular brain disease. The added “with agitation” means the record documents disruptive restlessness, irritability, or similar behavior.
Clinical signs
Expect advanced cognitive impairment that interferes with daily function, along with vascular features such as stepwise decline or focal neurologic history. Agitation may appear as pacing, verbal outbursts, resistance to care, or marked restlessness. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider clearly documents severe vascular dementia and specifically links agitation to the condition. The chart should support both the dementia type and the behavioral disturbance. If severity or agitation is not stated, check documentation before assigning this code.
Do not use for
Do not use this code for vascular dementia without severe impairment, or for dementia from another cause such as Alzheimer disease. Do not assign it if agitation is present but not documented as part of the diagnosis.
Coding tip
Code only when both severity and agitation are explicitly documented; otherwise, select the more specific supported dementia code.