ICD-10 Code F01.C4 – Vascular dementia, severe, with anxiety (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F01.C4 – Vascular dementia, severe, with anxiety
What it is
F01.C4 identifies severe vascular dementia, a major decline in thinking and daily function caused by cerebrovascular disease, with anxiety documented as a behavioral feature. Use it when the record clearly links the dementia to vascular causes and notes severe impairment.
Clinical signs
Clinical features vary; refer to documentation. Severe vascular dementia typically includes marked memory, judgment, and executive-function impairment, plus reduced ability to manage routine activities. Anxiety may appear as worry, restlessness, or fearfulness and should be documented as part of the condition.
When to use this code
Use this code when the provider documents severe vascular dementia and specifically records anxiety associated with the dementia. It is appropriate for encounters focused on assessment, monitoring, or care planning for advanced cognitive decline. Check that the vascular etiology and severity are both stated.
Do not use for
Do not use it for dementia without a vascular cause, or when severity and anxiety are not documented. If the chart only says “dementia” or “anxiety” separately, code the documented conditions instead. Check documentation.
Coding tip
Confirm that “severe” and “with anxiety” are explicitly linked to vascular dementia before assigning F01.C4.