ICD-10 Code F03.B – Unspecified dementia, moderate (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F03.B – Unspecified dementia, moderate
What it is
F03.B identifies dementia of moderate severity when the type is not specified in the record. Use it for a documented dementia syndrome with noticeable cognitive decline, but without a named underlying cause.
Clinical signs
Clinical features vary; refer to documentation. Moderate dementia commonly includes clear memory loss, impaired judgment, and reduced independence in daily activities, with the patient needing more supervision or assistance.
When to use this code
Use this code when the provider documents unspecified dementia and also describes the condition as moderate. It fits records that confirm dementia severity but do not identify Alzheimer disease, vascular dementia, or another specific type. Check documentation if severity is unclear.
Do not use for
Do not use F03.B if the chart names a specific dementia type; code that condition instead. Do not use it when the severity is not documented or when the record supports mild or severe dementia only.
Coding tip
Match both elements in the note: unspecified dementia and moderate severity; if either is missing, query or check documentation.