ICD-10 Code G40.A0 – Absence epileptic syndrome, not intractable (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G40.A0 – Absence epileptic syndrome, not intractable
What it is
This code identifies absence epileptic syndrome that is not intractable. Use it when the record supports an absence seizure disorder, and the seizures are not described as difficult to control.
Clinical signs
Typical features include brief staring spells, sudden interruption of activity, and impaired awareness with rapid return to baseline. Clinical features vary; refer to documentation.
When to use this code
Use G40.A0 when the provider documents absence epileptic syndrome and does not describe it as intractable or refractory. It may fit follow-up visits, problem lists, or encounters focused on established absence epilepsy. If the note only says “seizures,” check documentation.
Do not use for
Do not use this code for intractable absence epilepsy or for seizure types other than absence seizures. If the syndrome is not documented, or the diagnosis is uncertain, check documentation.
Coding tip
Confirm both the absence epileptic syndrome and the nonintractable status in the provider note before assigning G40.A0.