ICD-10 Code F03.B3 – Unspecified dementia, moderate, with mood disturbance (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F03.B3 – Unspecified dementia, moderate, with mood disturbance
What it is
This code identifies dementia of unspecified type with moderate cognitive impairment and a documented mood disturbance. Use it when the chart confirms dementia, but the specific underlying cause is not stated.
Clinical signs
Typical findings include memory loss, impaired judgment, and reduced ability to manage daily activities at a moderate level. The record should also show mood disturbance, such as depression, anxiety, or emotional lability; clinical features vary, refer to documentation.
When to use this code
Use F03.B3 when the provider documents unspecified dementia, notes moderate severity, and identifies a mood disturbance as part of the condition. It also fits when the type of dementia is not clarified, but the behavioral or mood component is clearly linked to the diagnosis.
Do not use for
Do not use this code if the dementia type is specified, such as Alzheimer’s or vascular dementia, unless documentation directs otherwise. Do not assign it when mood symptoms are present without documented dementia. Check documentation.
Coding tip
Confirm both moderate severity and mood disturbance in the provider’s note before coding, and avoid unspecified dementia codes when a more specific dementia type is documented.