ICD-10 Code F02.8 – Dementia in other diseases classified elsewhere, unspecified severity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F02.8 – Dementia in other diseases classified elsewhere, unspecified severity
What it is
This code identifies dementia caused by another underlying disease, when the dementia severity is not specified. Use it when the record links cognitive decline to a separate condition, but does not name mild, moderate, or severe.
Clinical signs
Clinical features vary; refer to documentation. Typical findings include memory loss, impaired judgment, and reduced ability to perform familiar tasks, with the dementia attributed to another documented disease.
When to use this code
Use this code when the provider documents dementia due to another disease and does not specify severity. It also fits cases where the underlying condition is named, but the chart does not support a more specific dementia severity code.
Do not use for
Do not use it for dementia without a stated underlying cause, or when the record clearly documents mild, moderate, or severe dementia. Check documentation if the cause or severity is unclear.
Coding tip
Confirm both the underlying disease and the absence of severity detail before assigning F02.8.