| G40501 | Epileptic seizures related to external causes, not intractable, with status epilepticus |
| G40509 | Epileptic seizures related to external causes, not intractable, without status epilepticus |
| G408 | Other epilepsy and recurrent seizures |
| G4080 | Other epilepsy |
| G40801 | Other epilepsy, not intractable, with status epilepticus |
| G40802 | Other epilepsy, not intractable, without status epilepticus |
| G40803 | Other epilepsy, intractable, with status epilepticus |
| G40804 | Other epilepsy, intractable, without status epilepticus |
| G4081 | Lennox-Gastaut syndrome |
| G40811 | Lennox-Gastaut syndrome, not intractable, with status epilepticus |
| G40812 | Lennox-Gastaut syndrome, not intractable, without status epilepticus |
| G40813 | Lennox-Gastaut syndrome, intractable, with status epilepticus |
| G40814 | Lennox-Gastaut syndrome, intractable, w/o status epilepticus Lennox-Gastaut syndrome, intractable, without status epilepticus |
| G4082 | Epileptic spasms |
| G40821 | Epileptic spasms, not intractable, with status epilepticus |
| G40822 | Epileptic spasms, not intractable, without status epilepticus |
| G40823 | Epileptic spasms, intractable, with status epilepticus |
| G40824 | Epileptic spasms, intractable, without status epilepticus |
| G4083 | Dravet syndrome |
| G40833 | Dravet syndrome, intractable, with status epilepticus |
| G40834 | Dravet syndrome, intractable, without status epilepticus |
| G4084 | KCNQ2-related epilepsy |
| G40841 | KCNQ2-related epilepsy, not intractable, with status epilepticus |
| G40842 | KCNQ2-related epilepsy, not intractable, without status epilepticus |
| G40843 | KCNQ2-related epilepsy, intractable, with status epilepticus KCNQ2-related epilepsy, intractable, with status epilepticus |
| G40844 | KCNQ2-related epilepsy, intractable, without status epilepticus |
| G4089 | Other seizures |
| G409 | Epilepsy, unspecified |
| G4090 | Epilepsy, unspecified, not intractable |
| G40901 | Epilepsy, unspecified, not intractable, with status epilepticus |
| G40909 | Epilepsy, unspecified, not intractable, without status epilepticus |
| G4091 | Epilepsy, unspecified, intractable |
| G40911 | Epilepsy, unspecified, intractable, with status epilepticus |
| G40919 | Epilepsy, unspecified, intractable, without status epilepticus |
| G40A | Absence epileptic syndrome |
| G40A0 | Absence epileptic syndrome, not intractable |
| G40A01 | Absence epileptic syndrome, not intractable, with status epilepticus |
| G40A09 | Absence epileptic syndrome, not intractable, without status epilepticus |
| G40A1 | Absence epileptic syndrome, intractable |
| G40A11 | Absence epileptic syndrome, intractable, with status epilepticus |
| G40A19 | Absence epileptic syndrome, intractable, without status epilepticus |
| G40B | Juvenile myoclonic epilepsy [impulsive petit mal] |
| G40B0 | Juvenile myoclonic epilepsy, not intractable |
| G40B01 | Juvenile myoclonic epilepsy, not intractable, with status epilepticus |
| G40B09 | Juvenile myoclonic epilepsy, not intractable, without status epilepticus |
| G40B1 | Juvenile myoclonic epilepsy, intractable |
| G40B11 | Juvenile myoclonic epilepsy, intractable, with status epilepticus |
| G40B19 | Juvenile myoclonic epilepsy, intractable, without status epilepticus |
| G40C | Lafora progressive myoclonus epilepsy |
| G40C0 | Lafora progressive myoclonus epilepsy, not intractable |