ICD-10 Code F01.B18 – Vascular dementia, moderate, with other behavioral disturbance (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F01.B18 – Vascular dementia, moderate, with other behavioral disturbance
What it is
This code identifies vascular dementia at a moderate stage, caused by cerebrovascular disease and accompanied by behavioral symptoms not named elsewhere. Use it when the record documents both the dementia severity and the additional behavioral disturbance.
Clinical signs
Typical findings include impaired memory, slowed thinking, reduced judgment, and difficulty with daily activities. Behavioral disturbance may include agitation, mood change, apathy, or other disruptive behavior; clinical features vary, so refer to documentation.
When to use this code
Use F01.B18 when the provider clearly documents vascular dementia, moderate severity, and an unspecified or other behavioral disturbance. This is appropriate when the chart supports dementia due to vascular disease and the behavioral issue is clinically relevant.
If the note describes a different stage, or does not specify behavioral disturbance, choose the more accurate code. Check documentation when the behavioral symptom is recorded only generally or is attributed to another condition.
Do not use for
Do not use this code for Alzheimer disease, mixed dementia, or vascular dementia without behavioral disturbance. Also avoid it when the record does not support moderate severity or the behavioral change is not documented.
Coding tip
Confirm both the dementia stage and the behavioral disturbance in the provider note before assigning F01.B18.