ICD-10-CM > G00-G99 > G40-G47 > G40 > G40.3 G40.3 Generalized idiopathic epilepsy and epileptic syndromes Non-Billable/Non-Specific Code Also MERRF syndrome, if applicable (E88.42) Codes G40.30Generalized idiopathic epilepsy and epileptic syndromes, not intractableG40.301Generalized idiopathic epilepsy and epileptic syndromes, not intractable, with status epilepticusG40.309Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticusG40.31Generalized idiopathic epilepsy and epileptic syndromes, intractableG40.311Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticusG40.319Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticus