ICD-10 Code F02.811 – Dementia in Other Diseases Classified Elsewhere, Unspecified Severity, with Agitation (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F02.811 – Dementia in other diseases classified elsewhere, unspecified severity, with agitation
What it is
This code identifies dementia caused by another underlying disease, when the severity is not specified and agitation is documented. Use it when the dementia is secondary to a known condition and the record supports associated agitation.
Clinical signs
Typical findings include cognitive decline with impaired memory, reasoning, or daily functioning, plus observable agitation such as restlessness or irritability. Clinical features vary; refer to documentation.
When to use this code
Use F02.811 when the provider documents dementia due to another disease and specifically notes agitation, but does not state the severity. It is appropriate when the underlying cause is identified elsewhere in the chart and the dementia is not coded as primary. Check documentation if the record does not clearly link the dementia to the other disease.
Do not use for
Do not use this code for dementia without agitation, for unspecified dementia not linked to another disease, or when a more specific severity is documented. Do not assign it if the underlying condition is not established.
Coding tip
Verify both the secondary cause and the agitation statement before assigning F02.811.