ICD-10-CM > G00-G99 > G40-G47 > G40 > G40.8 > G40.84 G40.84 KCNQ2-related epilepsy Non-Billable/Non-Specific Codes G40.841KCNQ2-related epilepsy, not intractable, with status epilepticusG40.842KCNQ2-related epilepsy, not intractable, without status epilepticusG40.843KCNQ2-related epilepsy, intractable, with status epilepticusG40.844KCNQ2-related epilepsy, intractable, without status epilepticus