G40
⚠ Non-billable (Header)Epilepsy and recurrent seizures
Diseases of the nervous system (G00-G99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
❌ Excludes1
directCannot be coded with G40
- • 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
directMay be coded together if both conditions coexist
- • hippocampal sclerosis (G93.81)
- • mesial temporal sclerosis (G93.81)
- • temporal sclerosis (G93.81)
- • Todd's paralysis (G83.84)
Child Codes (11)
G40.0Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onsetG40.1Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizuresG40.2Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizuresG40.3Generalized idiopathic epilepsy and epileptic syndromesG40.4Other generalized epilepsy and epileptic syndromesG40.5Epileptic seizures related to external causesG40.8Other epilepsy and recurrent seizuresG40.9Epilepsy, unspecifiedG40.AAbsence epileptic syndromeG40.BJuvenile myoclonic epilepsy [impulsive petit mal]G40.CLafora progressive myoclonus epilepsy
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CodeG40
BillableNo — Header code
CategoryDiseases of the nervous system (G00-G99)
Excludes15 rule(s)
Excludes24 note(s)
Child codes11
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)