G40.4Other generalized epilepsy and epileptic syndromes

G40.4 is the ICD-10-CM diagnosis code for other generalized epilepsy and epileptic syndromes. It belongs to category G40 (epilepsy and recurrent seizures), block G40-G47 (episodic and paroxysmal disorders) and chapter 6 (diseases of the nervous system). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within G40, choose G40.4 (Other generalized epilepsy and epileptic syndromes) only when documentation doesn't support a more specific option: Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset (G40.0), Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures (G40.1), Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures (G40.2), generalized idiopathic epilepsy and epileptic syndromes (G40.3), epileptic seizures related to external causes (G40.5), other epilepsy and recurrent seizures (G40.8), epilepsy, unspecified (G40.9), absence epileptic syndrome (G40.A) and 2 more.

To report this condition, pick the subcode that matches the documentation: G40.40 (not intractable), G40.41 (intractable) and G40.42 (disorder).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.