Is G40.84 a billable code?
No. G40.84 is a header code that groups 4 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
G40.84: KCNQ2-related epilepsy
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
G40.84 groups related diagnoses under kcnq2-related epilepsy. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under G40.84
- G40.841KCNQ2-related epilepsy, not intractable, with status epilepticus
- G40.842KCNQ2-related epilepsy, not intractable, without status epilepticus
- G40.843KCNQ2-related epilepsy, intractable, with status epilepticus
- G40.844KCNQ2-related epilepsy, intractable, without status epilepticus
Other codes in G40.8 Other epilepsy and recurrent seizures
G40.84 questions
What does G40.84 mean?
G40.84 is the ICD-10-CM code for KCNQ2-related epilepsy. It is in chapter 6, Diseases of the nervous system (G00-G99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.