ICD-10 Code F03.C0 – Unspecified Dementia, Severe, Without Behavioral Disturbance, Psychotic Disturbance, Mood Disturbance, and Anxiety (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F03.C0 – Unspecified dementia, severe, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety
What it is
This code identifies severe dementia when the type is not specified in the record. It is used only when the patient has no documented behavioral, psychotic, mood, or anxiety disturbance.
Clinical signs
Severe dementia usually means marked impairment in memory, reasoning, communication, and daily functioning. Clinical features vary; refer to documentation, and confirm that no qualifying behavioral or psychiatric disturbance is recorded.
When to use this code
Use this code when the provider documents unspecified dementia and clearly states it is severe. You should also confirm the chart excludes behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety. If the subtype is known, code that more specific dementia instead.
Do not use for
Do not use this code if the dementia type is documented, or if any behavioral, psychotic, mood, or anxiety disturbance is present. Check documentation for a more specific code or an additional diagnosis.
Coding tip
Verify both severity and the absence of specified disturbances before assigning F03.C0.