ICD-10 Code F03.A – Unspecified Dementia, Mild (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F03.A – Unspecified dementia, mild
What it is
This code identifies dementia with a mild severity level when the specific type is not documented. It indicates measurable cognitive decline with some independence still preserved.
Clinical signs
Typical findings include mild memory loss, reduced attention, and difficulty with complex tasks. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly documents dementia as mild but does not name a subtype such as Alzheimer’s disease or vascular dementia. It also fits when the clinician documents dementia severity without further specification.
Confirm that the chart supports a dementia diagnosis and mild severity. If the type is identified elsewhere in the record, code the specified condition instead.
Do not use for
Do not use this code for normal age-related forgetfulness, mild cognitive impairment, or unspecified cognitive symptoms without a dementia diagnosis. Check documentation.
Coding tip
Code the documented severity and any stated dementia type separately only when supported by the record.