ICD-10 Code G40.A19 – Absence epileptic syndrome, intractable, without status epilepticus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G40.A19 – Absence epileptic syndrome, intractable, without status epilepticus
What it is
This code identifies absence epileptic syndrome that does not respond to treatment and is not associated with status epilepticus. It describes a seizure disorder marked by recurrent absence-type events with persistent control problems.
Clinical signs
Typical features include brief staring spells, impaired awareness, and sudden interruption of activity. Clinical features vary; refer to documentation, especially when notes describe frequent absence seizures despite appropriate therapy.
When to use this code
Use this code when the record clearly documents absence epileptic syndrome as intractable and specifically states there is no status epilepticus. It may also apply when the clinician describes ongoing absence seizures despite treatment failure. Check documentation if the note only says “seizures” or does not identify the syndrome.
Do not use for
Do not use this code if the epilepsy is not documented as intractable or if status epilepticus is present. Do not assign it for nonspecific seizure disorders, syncope, or a history of seizures without current syndrome documentation.
Coding tip
Verify both elements—absence epileptic syndrome and intractable—before assigning G40.A19.