ICD-10 Code F01.A18 – Vascular dementia, mild, with other behavioral disturbance (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F01.A18 – Vascular dementia, mild, with other behavioral disturbance
What it is
This code identifies mild vascular dementia, meaning cognitive decline caused by cerebrovascular disease, with an additional behavioral disturbance. Use it when the record links the dementia to vascular causes and notes a behavior-related symptom.
Clinical signs
Common findings include impaired memory, slowed thinking, poor judgment, and reduced ability to manage daily tasks. Behavioral features may include agitation, mood changes, disinhibition, or other disruptive behaviors; clinical features vary, refer to documentation.
When to use this code
Use this code when the provider documents mild vascular dementia and specifies another behavioral disturbance. The chart should support both the vascular etiology and the behavioral component. If the behavioral issue is not stated, or the dementia severity differs, check documentation.
Do not use for
Do not use this code for dementia without a documented vascular cause, or for vascular dementia without behavioral disturbance. Do not assign it when the record describes moderate, severe, or unspecified dementia instead of mild.
Coding tip
Confirm that both “mild” and the specific behavioral disturbance are documented before coding F01.A18.