ICD-10 Code F03.A0 – Unspecified dementia, mild, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F03.A0 – Unspecified dementia, mild, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety
What it is
This code identifies mild dementia when the type is not specified and there are no documented behavioral, psychotic, mood, or anxiety disturbances. Use it when the record confirms dementia but does not name a more specific cause.
Clinical signs
Typical findings include mild memory loss, reduced short-term recall, and slight difficulty with complex tasks. Clinical features vary; refer to documentation for the level of cognitive impairment and the absence of associated disturbances.
When to use this code
Use this code when the provider documents unspecified dementia and describes it as mild, with no behavioral or psychiatric symptoms. It also fits when the note supports dementia severity but does not identify a specific dementia subtype.
Check that the chart does not mention agitation, psychosis, depression, or anxiety tied to the dementia. If a more specific diagnosis is documented, code that condition instead.
Do not use for
Do not use this code if the dementia type is known, such as Alzheimer disease or vascular dementia. Do not use it when behavioral, psychotic, mood, or anxiety disturbances are documented with the dementia.
Coding tip
Confirm both the unspecified dementia diagnosis and the mild severity before assigning F03.A0.