ICD-10 Code F02.B1 – Dementia in Other Diseases Classified Elsewhere, Moderate, with Behavioral Disturbance (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F02.B1 – Dementia in other diseases classified elsewhere, moderate, with behavioral disturbance
What it is
This code describes moderate dementia caused by another underlying disease, with documented behavioral disturbance. Use it when the dementia is not primary and the record links it to a separate condition.
Clinical signs
Clinical features vary; refer to documentation. Moderate dementia commonly includes noticeable memory loss, impaired reasoning, and reduced ability to manage daily activities, along with behaviors such as agitation, wandering, or mood changes.
When to use this code
Use F02.B1 when the provider documents dementia due to another disease and specifies the severity as moderate with behavioral disturbance. The underlying disease should also be documented and coded separately when required. If the chart does not clearly identify the cause or behavior, check documentation.
Do not use for
Do not use this code for dementia without behavioral disturbance, mild or severe dementia, or dementia not linked to another disease. Do not use it when the cause is unspecified.
Coding tip
Verify both the underlying disease and the behavioral disturbance in the note before assigning this code.