G40.9
G40.9 — Epilepsy, unspecified
Non-billable headerICD-10-CM
G40.9 is a non-billable header ICD-10-CM code for epilepsy, unspecified. It cannot be billed on its own: choose one of the more specific child codes below.
Other codes that can never be billed with G40.9
These codes carry an Excludes1 note pointing at G40.9. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G40.9 alone.
Risk adjustment
G40.9 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code to one of these instead G40.9
2 child codes. Green means billable.
Related codes at this level
Codes that share G40. If G40.9 is not quite right, the correct code is usually one of these.
- G40.0Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset
- G40.1Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures
- G40.2Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures
- G40.3Generalized idiopathic epilepsy and epileptic syndromes
- G40.AAbsence epileptic syndrome
- G40.BJuvenile myoclonic epilepsy [impulsive petit mal]
- G40.CLafora progressive myoclonus epilepsy
- G40.4Other generalized epilepsy and epileptic syndromes
- G40.5Epileptic seizures related to external causes
- G40.8Other epilepsy and recurrent seizures
Questions about G40.9
- Is G40.9 a billable ICD-10-CM code?
- No. G40.9 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does G40.9 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Episodic and paroxysmal disorders (G40-G47).