G40.842: KCNQ2-related epilepsy, not intractable, without status epilepticus
G40.842 is a billable, specific ICD-10-CM code for kcnq2-related epilepsy, not intractable, without status epilepticus. It is valid for submission on a claim.
Check G40.842 with the rest of the claim: free scrubberInclusion terms
Alternative wordings a physician may use in the chart for this same code.
- KCNQ2-related epilepsy NOS
Excludes1 inherited from the categories above G40.842
A category’s note binds every code beneath it.
Excludes2 inherited from the categories above G40.842
Not part of this code, but both may be coded when both are present.
Other codes that can never be billed with G40.842
Their own Excludes1 notes name this code, so the conflict is not listed above.
Risk adjustment
G40.842 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 201 Seizure Disorders and Convulsions0.245 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.
Medicare coverage
G40.842 is named in 7 Medicare coverage policies: 7 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A56612Billing and Coding: CT of the Head
- A56619Billing and Coding: Nerve Conduction Studies and Electromyography
- A56771Billing and Coding: Special Electroencephalography
- A56868Billing and Coding: Outpatient Speech Language Pathology
Alphabetic index entries that lead here
- Epilepsy, epileptic, epilepsia›KCNQ2-related
- Epilepsy, epileptic, epilepsia›KCNQ2-related›not intractable
- Epilepsy, epileptic, epilepsia›KCNQ2-related›not intractable›without status epilepticus
Code history
- addedFY2024-FY2027
KCNQ2-related epilepsy, not intractable, without status epilepticus