|  G40 |  | Epilepsy and recurrent seizures   | 
	
		|  |  | 
	
		| Notes | the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled 
 |  
		| Excludes1 | conversion disorder with seizures (F44.5) convulsions NOS (R56.9)
 post traumatic seizures (R56.1)
 seizure (convulsive) NOS (R56.9)
 seizure of newborn (P90)
 
 |  
		| Excludes2 | hippocampal sclerosis (G93.81) mesial temporal sclerosis (G93.81)
 temporal sclerosis (G93.81)
 Todd's paralysis (G83.84)
 
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|  |  | 
	
		|  G40.0 |  | Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset |  
		|  |  | 
| Benign childhood epilepsy with centrotemporal EEG spikes |  | Childhood epilepsy with occipital EEG paroxysms |  
		| Excludes1 | adult onset localization-related epilepsy (G40.1-, G40.2-) 
 |  |  |  |  | 
	
		|  G40.00 |  | Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable |  
		|  |  | 
| Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset without intractability |  |  |  |  | 
	
		|  G40.001 |  | Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.009 |  | Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, without status epilepticus |  
		|  |  | 
| Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset NOS |  |  |  |  |  |  | 
	
		|  G40.01 |  | Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable |  |  |  | 
	
		|  G40.011 |  | Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.019 |  | Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, without status epilepticus |  |  |  | 
|  |  | 
	
		|  G40.1 |  | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures |  
		|  |  | 
| Attacks without alteration of consciousness |  | Epilepsia partialis continua [Kozhevnikof] |  | Simple partial seizures developing into secondarily generalized seizures |  |  |  |  | 
	
		|  G40.10 |  | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable |  
		|  |  | 
| Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures without intractability |  |  |  |  | 
	
		|  G40.101 |  | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.109 |  | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, without status epilepticus |  
		|  |  | 
| Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures NOS |  |  |  |  |  |  | 
	
		|  G40.11 |  | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable |  |  |  | 
	
		|  G40.111 |  | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.119 |  | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, without status epilepticus |  |  |  | 
|  |  | 
	
		|  G40.2 |  | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures |  
		|  |  | 
| Attacks with alteration of consciousness, often with automatisms |  | Complex partial seizures developing into secondarily generalized seizures |  |  |  |  | 
	
		|  G40.20 |  | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable |  
		|  |  | 
| Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures without intractability |  |  |  |  | 
	
		|  G40.201 |  | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.209 |  | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, without status epilepticus |  
		|  |  | 
| Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures NOS |  |  |  |  |  |  | 
	
		|  G40.21 |  | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable |  |  |  | 
	
		|  G40.211 |  | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.219 |  | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, without status epilepticus |  |  |  | 
|  |  | 
	
		|  G40.3 |  | Generalized idiopathic epilepsy and epileptic syndromes |  
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		| CodeAlso | MERRF syndrome, if applicable (E88.42) 
 |  |  |  |  | 
	
		|  G40.30 |  | Generalized idiopathic epilepsy and epileptic syndromes, not intractable |  
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| Generalized idiopathic epilepsy and epileptic syndromes without intractability |  |  |  |  | 
	
		|  G40.301 |  | Generalized idiopathic epilepsy and epileptic syndromes, not intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.309 |  | Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticus |  
		|  |  | 
| Generalized idiopathic epilepsy and epileptic syndromes NOS |  |  |  |  |  |  | 
	
		|  G40.31 |  | Generalized idiopathic epilepsy and epileptic syndromes, intractable |  |  |  | 
	
		|  G40.311 |  | Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.319 |  | Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticus |  |  |  | 
|  |  | 
	
		|  G40.A |  | Absence epileptic syndrome |  
		|  |  | 
| Childhood absence epilepsy [pyknolepsy] |  | Juvenile absence epilepsy |  | Absence epileptic syndrome, NOS |  |  |  |  | 
	
		|  G40.A0 |  | Absence epileptic syndrome, not intractable |  |  |  | 
	
		|  G40.A01 |  | Absence epileptic syndrome, not intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.A09 |  | Absence epileptic syndrome, not intractable, without status epilepticus |  |  |  |  |  | 
	
		|  G40.A1 |  | Absence epileptic syndrome, intractable |  |  |  | 
	
		|  G40.A11 |  | Absence epileptic syndrome, intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.A19 |  | Absence epileptic syndrome, intractable, without status epilepticus |  |  |  | 
|  |  | 
	
		|  G40.B |  | Juvenile myoclonic epilepsy [impulsive petit mal] |  |  |  | 
	
		|  G40.B0 |  | Juvenile myoclonic epilepsy, not intractable |  |  |  | 
	
		|  G40.B01 |  | Juvenile myoclonic epilepsy, not intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.B09 |  | Juvenile myoclonic epilepsy, not intractable, without status epilepticus |  |  |  |  |  | 
	
		|  G40.B1 |  | Juvenile myoclonic epilepsy, intractable |  |  |  | 
	
		|  G40.B11 |  | Juvenile myoclonic epilepsy, intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.B19 |  | Juvenile myoclonic epilepsy, intractable, without status epilepticus |  |  |  | 
|  |  | 
	
		|  G40.C |  | Lafora progressive myoclonus epilepsy |  
		|  |  | 
| Lafora body disease |  
		| CodeAlso | , if applicable, associated conditions such as dementia (F02.8-) 
 |  |  |  |  | 
	
		|  G40.C0 |  | Lafora progressive myoclonus epilepsy, not intractable |  |  |  | 
	
		|  G40.C01 |  | Lafora progressive myoclonus epilepsy, not intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.C09 |  | Lafora progressive myoclonus epilepsy, not intractable, without status epilepticus |  
		|  |  | 
| Lafora progressive myoclonus epilepsy NOS |  |  |  |  |  |  | 
	
		|  G40.C1 |  | Lafora progressive myoclonus epilepsy, intractable |  |  |  | 
	
		|  G40.C11 |  | Lafora progressive myoclonus epilepsy, intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.C19 |  | Lafora progressive myoclonus epilepsy, intractable, without status epilepticus |  |  |  | 
|  |  | 
	
		|  G40.4 |  | Other generalized epilepsy and epileptic syndromes |  
		|  |  | 
| Epilepsy with grand mal seizures on awakening |  | Epilepsy with myoclonic absences |  | Epilepsy with myoclonic-astatic seizures |  | Grand mal seizure NOS |  | Nonspecific atonic epileptic seizures |  | Nonspecific clonic epileptic seizures |  | Nonspecific myoclonic epileptic seizures |  | Nonspecific tonic epileptic seizures |  | Nonspecific tonic-clonic epileptic seizures |  | Symptomatic early myoclonic encephalopathy |  |  |  |  | 
	
		|  G40.40 |  | Other generalized epilepsy and epileptic syndromes, not intractable |  
		|  |  | 
| Other generalized epilepsy and epileptic syndromes without intractability |  | Other generalized epilepsy and epileptic syndromes NOS |  |  |  |  | 
	
		|  G40.401 |  | Other generalized epilepsy and epileptic syndromes, not intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.409 |  | Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticus |  |  |  |  |  | 
	
		|  G40.41 |  | Other generalized epilepsy and epileptic syndromes, intractable |  |  |  | 
	
		|  G40.411 |  | Other generalized epilepsy and epileptic syndromes, intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.419 |  | Other generalized epilepsy and epileptic syndromes, intractable, without status epilepticus |  |  |  |  |  | 
	
		|  G40.42 |  | Cyclin-Dependent Kinase-Like 5 Deficiency Disorder |  
		|  |  | 
| CDKL5 |  
		| UseAdditionalCode | code, if known, to identify associated manifestations, such as: cortical blindness (H47.61-)
 global developmental delay (F88)
 
 |  |  |  | 
|  |  | 
	
		|  G40.5 |  | Epileptic seizures related to external causes |  
		|  |  | 
| 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 |  
		| CodeAlso | , if applicable, associated epilepsy and recurrent seizures (G40.-) 
 |  
		| UseAdditionalCode | code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) 
 |  |  |  |  | 
	
		|  G40.50 |  | Epileptic seizures related to external causes, not intractable |  |  |  | 
	
		|  G40.501 |  | Epileptic seizures related to external causes, not intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.509 |  | Epileptic seizures related to external causes, not intractable, without status epilepticus |  
		|  |  | 
| Epileptic seizures related to external causes, NOS |  |  |  |  | 
|  |  | 
	
		|  G40.8 |  | Other epilepsy and recurrent seizures |  
		|  |  | 
| Epilepsies and epileptic syndromes undetermined as to whether they are focal or generalized |  | Landau-Kleffner syndrome |  |  |  |  | 
	
		|  G40.80 |  | Other epilepsy |  |  |  | 
	
		|  G40.801 |  | Other epilepsy, not intractable, with status epilepticus |  
		|  |  | 
| Other epilepsy without intractability with status epilepticus |  |  |  |  |  | 
	
		|  G40.802 |  | Other epilepsy, not intractable, without status epilepticus |  
		|  |  | 
| Other epilepsy NOS |  | Other epilepsy without intractability without status epilepticus |  |  |  |  |  | 
	
		|  G40.803 |  | Other epilepsy, intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.804 |  | Other epilepsy, intractable, without status epilepticus |  |  |  |  |  | 
	
		|  G40.81 |  | Lennox-Gastaut syndrome |  |  |  | 
	
		|  G40.811 |  | Lennox-Gastaut syndrome, not intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.812 |  | Lennox-Gastaut syndrome, not intractable, without status epilepticus |  |  |  |  | 
	
		|  G40.813 |  | Lennox-Gastaut syndrome, intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.814 |  | Lennox-Gastaut syndrome, intractable, without status epilepticus |  |  |  |  |  | 
	
		|  G40.82 |  | Epileptic spasms |  
		|  |  | 
| Infantile spasms |  | Salaam attacks |  | West's syndrome |  |  |  |  | 
	
		|  G40.821 |  | Epileptic spasms, not intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.822 |  | Epileptic spasms, not intractable, without status epilepticus |  |  |  |  | 
	
		|  G40.823 |  | Epileptic spasms, intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.824 |  | Epileptic spasms, intractable, without status epilepticus |  |  |  |  |  | 
	
		|  G40.83 |  | Dravet syndrome |  
		|  |  | 
| Polymorphic epilepsy in infancy (PMEI) |  | Severe myoclonic epilepsy in infancy (SMEI) |  |  |  |  | 
	
		|  G40.833 |  | Dravet syndrome, intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.834 |  | Dravet syndrome, intractable, without status epilepticus |  
		|  |  |  |  |  |  |  |  | 
	
		|  G40.84 |  | KCNQ2-related epilepsy |  |  |  | 
	
		|  G40.841 |  | KCNQ2-related epilepsy, not intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.842 |  | KCNQ2-related epilepsy, not intractable, without status epilepticus |  
		|  |  | 
| KCNQ2-related epilepsy NOS |  |  |  |  |  | 
	
		|  G40.843 |  | KCNQ2-related epilepsy, intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.844 |  | KCNQ2-related epilepsy, intractable, without status epilepticus |  |  |  |  |  | 
	
		|  G40.89 |  | Other seizures |  
		|  |  | 
	
		| Excludes1 | post traumatic seizures (R56.1) recurrent seizures NOS (G40.909)
 seizure NOS (R56.9)
 
 |  |  |  | 
|  |  | 
	
		|  G40.9 |  | Epilepsy, unspecified |  |  |  | 
	
		|  G40.90 |  | Epilepsy, unspecified, not intractable |  
		|  |  | 
| Epilepsy, unspecified, without intractability |  |  |  |  | 
	
		|  G40.901 |  | Epilepsy, unspecified, not intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.909 |  | Epilepsy, unspecified, not intractable, without status epilepticus |  
		|  |  | 
| Epilepsy NOS |  | Epileptic convulsions NOS |  | Epileptic fits NOS |  | Epileptic seizures NOS |  | Recurrent seizures NOS |  | Seizure disorder NOS |  |  |  |  |  |  | 
	
		|  G40.91 |  | Epilepsy, unspecified, intractable |  
		|  |  | 
| Intractable seizure disorder NOS |  |  |  |  | 
	
		|  G40.911 |  | Epilepsy, unspecified, intractable, with status epilepticus |  |  |  |  | 
	
		|  G40.919 |  | Epilepsy, unspecified, intractable, without status epilepticus |  |  |  |