ICD-10 Code F01.A1 – Vascular dementia, mild, with behavioral disturbance (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F01.A1 – Vascular dementia, mild, with behavioral disturbance
What it is
This code identifies mild vascular dementia caused by cerebrovascular disease, with documented behavioral disturbance. Use it when the chart shows cognitive decline from vascular injury and a behavioral component is present.
Clinical signs
Typical findings include memory or executive function impairment, slowed thinking, and reduced ability to manage daily tasks. Behavioral disturbance may include agitation, mood change, irritability, or other disruptive behavior; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider documents mild vascular dementia and specifically notes behavioral disturbance. It fits cases where dementia is attributed to vascular etiology, such as prior strokes or chronic ischemic brain injury. If severity or behavior is not clearly stated, check documentation.
Do not use for
Do not use it for vascular dementia without behavioral disturbance, or when the record does not support mild severity. Do not assign it for other dementia types, such as Alzheimer’s disease or unspecified dementia.
Coding tip
Confirm both the dementia severity and the behavioral disturbance in the provider note before coding.