G40 is a non-billable/non-specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: 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
Type 1 excludes
Type 2 excludes
Codes
G40.0
Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset
G40.1
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures
G40.2
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures
G40.3
Generalized idiopathic epilepsy and epileptic syndromes
G40.A
Absence epileptic syndrome
G40.B
Juvenile myoclonic epilepsy [impulsive petit mal]
G40.C
Lafora progressive myoclonus epilepsy
G40.4
Other generalized epilepsy and epileptic syndromes
G40.5
Epileptic seizures related to external causes
G40.8
Other epilepsy and recurrent seizures
G40.9
Epilepsy, unspecified
Versions
2025
No changes
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
Code changed
Type 1 excludes
conversion disorder with seizures (F44.5)convulsions NOS (R56.9)hippocampal sclerosis (G93.81)mesial temporal sclerosis (G93.81)post traumatic seizures (R56.1)seizure (convulsive) NOS (R56.9)seizure of newborn (P90)temporal sclerosis (G93.81)Todd's paralysis (G83.8)
- conversion disorder with seizures (F44.5)
- convulsions NOS (R56.9)
- post traumatic seizures (R56.1)
- seizure (convulsive) NOS (R56.9)
- seizure of newborn (P90)
Type 2 excludes
- hippocampal sclerosis (G93.81)
- mesial temporal sclerosis (G93.81)
- temporal sclerosis (G93.81)
- Todd's paralysis (G83.84)
2016
New code