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G40.5 Epileptic seizures related to external causes
BackG40Epilepsy and recurrent seizuresCategory11 →G40.0Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onsetCategory2 →G40.00Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractableCategory2 →G40.001Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, with status epilepticusCategoryG40.009Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, without status epilepticusCategoryG40.01Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractableCategory2 →G40.011Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, with status epilepticusCategoryG40.019Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, without status epilepticusCategoryG40.1Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizuresCategory2 →G40.10Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractableCategory2 →G40.101Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, with status epilepticusCategoryG40.109Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, without status epilepticusCategoryG40.11Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractableCategory2 →G40.111Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, with status epilepticusCategoryG40.119Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, without status epilepticusCategoryG40.2Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizuresCategory2 →G40.20Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractableCategory2 →G40.201Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, with status epilepticusCategoryG40.209Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, without status epilepticusCategoryG40.21Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractableCategory2 →G40.211Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, with status epilepticusCategoryG40.219Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, without status epilepticusCategoryG40.3Generalized idiopathic epilepsy and epileptic syndromesCategory2 →G40.30Generalized idiopathic epilepsy and epileptic syndromes, not intractableCategory2 →G40.301Generalized idiopathic epilepsy and epileptic syndromes, not intractable, with status epilepticusCategoryG40.309Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticusCategoryG40.31Generalized idiopathic epilepsy and epileptic syndromes, intractableCategory2 →G40.311Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticusCategoryG40.319Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticusCategoryG40.4Other generalized epilepsy and epileptic syndromesCategory3 →G40.40Other generalized epilepsy and epileptic syndromes, not intractableCategory2 →G40.401Other generalized epilepsy and epileptic syndromes, not intractable, with status epilepticusCategoryG40.409Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticusCategoryG40.41Other generalized epilepsy and epileptic syndromes, intractableCategory2 →G40.411Other generalized epilepsy and epileptic syndromes, intractable, with status epilepticusCategoryG40.419Other generalized epilepsy and epileptic syndromes, intractable, without status epilepticusCategoryG40.42Cyclin-Dependent Kinase-Like 5 Deficiency DisorderCategoryG40.5Epileptic seizures related to external causesCategory1 →G40.50Epileptic seizures related to external causes, not intractableCategory2 →G40.501Epileptic seizures related to external causes, not intractable, with status epilepticusCategoryG40.509Epileptic seizures related to external causes, not intractable, without status epilepticusCategoryG40.8Other epilepsy and recurrent seizuresCategory6 →G40.80Other epilepsyCategory4 →G40.801Other epilepsy, not intractable, with status epilepticusCategoryG40.802Other epilepsy, not intractable, without status epilepticusCategoryG40.803Other epilepsy, intractable, with status epilepticusCategoryG40.804Other epilepsy, intractable, without status epilepticusCategoryG40.81Lennox-Gastaut syndromeCategory4 →G40.811Lennox-Gastaut syndrome, not intractable, with status epilepticusCategoryG40.812Lennox-Gastaut syndrome, not intractable, without status epilepticusCategoryG40.813Lennox-Gastaut syndrome, intractable, with status epilepticusCategoryG40.814Lennox-Gastaut syndrome, intractable, without status epilepticusCategoryG40.82Epileptic spasmsCategory4 →G40.821Epileptic spasms, not intractable, with status epilepticusCategoryG40.822Epileptic spasms, not intractable, without status epilepticusCategoryG40.823Epileptic spasms, intractable, with status epilepticusCategoryG40.824Epileptic spasms, intractable, without status epilepticusCategoryG40.83Dravet syndromeCategory2 →G40.833Dravet syndrome, intractable, with status epilepticusCategoryG40.834Dravet syndrome, intractable, without status epilepticusCategoryG40.84KCNQ2-related epilepsyCategory4 →G40.841KCNQ2-related epilepsy, not intractable, with status epilepticusCategoryG40.842KCNQ2-related epilepsy, not intractable, without status epilepticusCategoryG40.843KCNQ2-related epilepsy, intractable, with status epilepticusCategoryG40.844KCNQ2-related epilepsy, intractable, without status epilepticusCategoryG40.89Other seizuresCategoryG40.9Epilepsy, unspecifiedCategory2 →G40.90Epilepsy, unspecified, not intractableCategory2 →G40.901Epilepsy, unspecified, not intractable, with status epilepticusCategoryG40.909Epilepsy, unspecified, not intractable, without status epilepticusCategoryG40.91Epilepsy, unspecified, intractableCategory2 →G40.911Epilepsy, unspecified, intractable, with status epilepticusCategoryG40.919Epilepsy, unspecified, intractable, without status epilepticusCategoryG40.AAbsence epileptic syndromeCategory2 →G40.A0Absence epileptic syndrome, not intractableCategory2 →G40.A01Absence epileptic syndrome, not intractable, with status epilepticusCategoryG40.A09Absence epileptic syndrome, not intractable, without status epilepticusCategoryG40.A1Absence epileptic syndrome, intractableCategory2 →G40.A11Absence epileptic syndrome, intractable, with status epilepticusCategoryG40.A19Absence epileptic syndrome, intractable, without status epilepticusCategoryG40.BJuvenile myoclonic epilepsy [impulsive petit mal]Category2 →G40.B0Juvenile myoclonic epilepsy, not intractableCategory2 →G40.B01Juvenile myoclonic epilepsy, not intractable, with status epilepticusCategoryG40.B09Juvenile myoclonic epilepsy, not intractable, without status epilepticusCategoryG40.B1Juvenile myoclonic epilepsy, intractableCategory2 →G40.B11Juvenile myoclonic epilepsy, intractable, with status epilepticusCategoryG40.B19Juvenile myoclonic epilepsy, intractable, without status epilepticusCategoryG40.CLafora progressive myoclonus epilepsyCategory2 →G40.C0Lafora progressive myoclonus epilepsy, not intractableCategory2 →G40.C01Lafora progressive myoclonus epilepsy, not intractable, with status epilepticusCategoryG40.C09Lafora progressive myoclonus epilepsy, not intractable, without status epilepticusCategoryG40.C1Lafora progressive myoclonus epilepsy, intractableCategory2 →G40.C11Lafora progressive myoclonus epilepsy, intractable, with status epilepticusCategoryG40.C19Lafora progressive myoclonus epilepsy, intractable, without status epilepticusCategory
Category
G40.5
Epileptic seizures related to external causes
EXAMPLES
Epileptic seizures related to alcohol
Epileptic seizures related to drugs
Epileptic seizures related to hormonal changes
Epileptic seizures related to sleep deprivation
Epileptic seizures related to stress
Epileptic seizures related to drugs
Epileptic seizures related to hormonal changes
Epileptic seizures related to sleep deprivation
Epileptic seizures related to stress
CODING RULE
Use additional code: code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Code also: , if applicable, associated epilepsy and recurrent seizures (G40.-)
Code also: , if applicable, associated epilepsy and recurrent seizures (G40.-)
- Chapter
- VI · Diseases of the nervous system
- Section
- G40-G47
- Valid from
Source
CMS ICD-10-CM Tabular List, edition FY2026.