ICD-10 Code G31.0 – Frontotemporal dementia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G31.0 – Frontotemporal dementia
What it is
G31.0 identifies frontotemporal dementia, a neurodegenerative disorder that primarily affects the frontal and temporal lobes. It is used for progressive decline in behavior, personality, language, or executive function.
Clinical signs
Common findings include early behavioral change, loss of social inhibition, apathy, or language impairment. Clinical features vary; refer to documentation for the specific pattern and severity.
When to use this code
Use G31.0 when the provider documents frontotemporal dementia or a confirmed frontotemporal lobar degeneration syndrome with dementia. Apply it when the record supports a progressive cognitive disorder centered on behavior or language, not a nonspecific memory-only dementia. Check documentation if the subtype is unclear.
Do not use for
Do not use this code for mild cognitive impairment, delirium, or other dementias without documentation of frontotemporal dementia. If the diagnosis is uncertain or only suspected, check documentation before assigning G31.0.
Coding tip
Capture the provider’s exact dementia type and any documented behavioral or language variant to support accurate code selection.