ICD-10 Code G40.319 – Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G40.319 – Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticus
What it is
This code identifies generalized idiopathic epilepsy or an epileptic syndrome that is difficult to control with treatment and does not include status epilepticus. It applies when the seizure disorder is documented as intractable and generalized rather than focal.
Clinical signs
Typical documentation may describe recurrent generalized seizures, such as absence, myoclonic, or generalized tonic-clonic events. Clinical features vary; refer to documentation, and confirm that the epilepsy is idiopathic, generalized, and intractable.
When to use this code
Use this code when the provider clearly documents generalized idiopathic epilepsy or a generalized epileptic syndrome that remains refractory to therapy. The record should also state that status epilepticus is not present. If the note only says “epilepsy” or does not specify intractable, check documentation.
Do not use for
Do not use this code for focal epilepsy, provoked seizures, or epilepsy with status epilepticus. If the seizure type, cause, or control status is unclear, check documentation before coding.
Coding tip
Verify both “intractable” and “without status epilepticus” in the provider note before assigning G40.319.