G40 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Epilepsy and recurrent seizures.
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The following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled
Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures
Generalized idiopathic epilepsy and epileptic syndromes
Absence epileptic syndrome
Juvenile myoclonic epilepsy [impulsive petit mal]
Lafora progressive myoclonus epilepsy
Other generalized epilepsy and epileptic syndromes
Epileptic seizures related to external causes
Other epilepsy and recurrent seizures
Epilepsy, unspecified
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