ICD-10-CM category
G40 Epilepsy
G40 is a category, not a billable code. Report one of the 58 complete codes below.
G40.0…
4 codes
- G40.001Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, with status epilepticus
- G40.009Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, without status epilepticus
- G40.011Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, with status epilepticus
- G40.019Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, without status epilepticus
G40.1…
4 codes
- G40.101Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, with status epilepticus
- G40.109Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, without status epilepticus
- G40.111Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, with status epilepticus
- G40.119Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, without status epilepticus
G40.2…
4 codes
- G40.201Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, with status epilepticus
- G40.209Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, without status epilepticus
- G40.211Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, with status epilepticus
- G40.219Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, without status epilepticus
G40.3…
4 codes
- G40.301Generalized idiopathic epilepsy and epileptic syndromes, not intractable, with status epilepticus
- G40.309Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticus
- G40.311Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticus
- G40.319Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticus
G40.4…
5 codes
- G40.401Other generalized epilepsy and epileptic syndromes, not intractable, with status epilepticus
- G40.409Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticus
- G40.411Other generalized epilepsy and epileptic syndromes, intractable, with status epilepticus
- G40.419Other generalized epilepsy and epileptic syndromes, intractable, without status epilepticus
- G40.42Cyclin-Dependent Kinase-Like 5 Deficiency Disorder
G40.5…
2 codes
G40.8…
19 codes
- G40.801Other epilepsy, not intractable, with status epilepticus
- G40.802Other epilepsy, not intractable, without status epilepticus
- G40.803Other epilepsy, intractable, with status epilepticus
- G40.804Other epilepsy, intractable, without status epilepticus
- G40.811Lennox-Gastaut syndrome, not intractable, with status epilepticus
- G40.812Lennox-Gastaut syndrome, not intractable, without status epilepticus
- G40.813Lennox-Gastaut syndrome, intractable, with status epilepticus
- G40.814Lennox-Gastaut syndrome, intractable, without status epilepticus
- G40.821Epileptic spasms, not intractable, with status epilepticus
- G40.822Epileptic spasms, not intractable, without status epilepticus
- G40.823Epileptic spasms, intractable, with status epilepticus
- G40.824Epileptic spasms, intractable, without status epilepticus
- G40.833Dravet syndrome, intractable, with status epilepticus
- G40.834Dravet syndrome, intractable, without status epilepticus
- 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
- G40.89Other seizures
G40.9…
4 codes
G40.A…
4 codes
G40.B…
4 codes
- G40.B01Juvenile myoclonic epilepsy, not intractable, with status epilepticus
- G40.B09Juvenile myoclonic epilepsy, not intractable, without status epilepticus
- G40.B11Juvenile myoclonic epilepsy, intractable, with status epilepticus
- G40.B19Juvenile myoclonic epilepsy, intractable, without status epilepticus
G40.C…
4 codes
- G40.C01Lafora progressive myoclonus epilepsy, not intractable, with status epilepticus
- G40.C09Lafora progressive myoclonus epilepsy, not intractable, without status epilepticus
- G40.C11Lafora progressive myoclonus epilepsy, intractable, with status epilepticus
- G40.C19Lafora progressive myoclonus epilepsy, intractable, without status epilepticus
Outside the US? G40 in the international WHO ICD-10 lists its inclusion and exclusion notes.
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ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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