ICD-10 Code F02.B – Dementia in other diseases classified elsewhere, moderate (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F02.B – Dementia in other diseases classified elsewhere, moderate
What it is
This code identifies moderate dementia caused by another underlying disease, rather than a primary dementia disorder. You should report it when the record links the cognitive decline to a separate medical condition.
Clinical signs
Clinical features vary; refer to documentation. Moderate dementia typically includes clear memory loss, impaired reasoning, and reduced ability to manage daily activities, with symptoms significant enough to affect routine function.
When to use this code
Use this code when the provider documents dementia due to another disease and specifies the severity as moderate. The chart should identify both the dementia and the underlying condition causing it. If severity or cause is unclear, check documentation before coding.
Do not use for
Do not use this code for unspecified dementia, mild or severe dementia, or dementia without a documented underlying disease. Also avoid it when the record does not clearly support secondary dementia.
Coding tip
Confirm both the causative disease and the documented severity before assigning F02.B.