G40 ICD-10-CM Code: Epilepsy and recurrent seizures
G40 isn’t billable on its own. Choose one of the 58 billable codes beneath it, the one the documentation supports.
Official description
G40Epilepsy and recurrent seizures
ICD-10-CM diagnosis code · United States clinical modification
Billable codes under G40
G40 can’t be reported on its own. Choose the code below that matches what the note documents.
G40.0 · Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset
G40.001Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, with status epilepticusG40.009Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, without status epilepticusG40.011Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, with status epilepticusG40.019Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, without status epilepticusG40.1 · Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures
G40.101Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, with status epilepticusG40.109Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, without status epilepticusG40.111Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, with status epilepticusG40.119Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, without status epilepticusG40.2 · Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures
G40.201Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, with status epilepticusG40.209Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, without status epilepticusG40.211Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, with status epilepticusG40.219Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, without status epilepticusG40.3 · Generalized idiopathic epilepsy and epileptic syndromes
G40.301Generalized idiopathic epilepsy and epileptic syndromes, not intractable, with status epilepticusG40.309Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticusG40.311Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticusG40.319Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticusG40.4 · Other generalized epilepsy and epileptic syndromes
G40.401Other generalized epilepsy and epileptic syndromes, not intractable, with status epilepticusG40.409Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticusG40.411Other generalized epilepsy and epileptic syndromes, intractable, with status epilepticusG40.419Other generalized epilepsy and epileptic syndromes, intractable, without status epilepticusG40.42Cyclin-Dependent Kinase-Like 5 Deficiency DisorderG40.8 · Other epilepsy and recurrent seizures
G40.801Other epilepsy, not intractable, with status epilepticusG40.802Other epilepsy, not intractable, without status epilepticusG40.803Other epilepsy, intractable, with status epilepticusG40.804Other epilepsy, intractable, without status epilepticusG40.811Lennox-Gastaut syndrome, not intractable, with status epilepticusG40.812Lennox-Gastaut syndrome, not intractable, without status epilepticusG40.813Lennox-Gastaut syndrome, intractable, with status epilepticusG40.814Lennox-Gastaut syndrome, intractable, without status epilepticusG40.821Epileptic spasms, not intractable, with status epilepticusG40.822Epileptic spasms, not intractable, without status epilepticusG40.823Epileptic spasms, intractable, with status epilepticusG40.824Epileptic spasms, intractable, without status epilepticusG40.833Dravet syndrome, intractable, with status epilepticusG40.834Dravet syndrome, intractable, without status epilepticusG40.841KCNQ2-related epilepsy, not intractable, with status epilepticusG40.842KCNQ2-related epilepsy, not intractable, without status epilepticusG40.843KCNQ2-related epilepsy, intractable, with status epilepticusG40.844KCNQ2-related epilepsy, intractable, without status epilepticusG40.89Other seizuresG40.B · Juvenile myoclonic epilepsy [impulsive petit mal]
G40.B01Juvenile myoclonic epilepsy, not intractable, with status epilepticusG40.B09Juvenile myoclonic epilepsy, not intractable, without status epilepticusG40.B11Juvenile myoclonic epilepsy, intractable, with status epilepticusG40.B19Juvenile myoclonic epilepsy, intractable, without status epilepticusG40.C · Lafora progressive myoclonus epilepsy
G40.C01Lafora progressive myoclonus epilepsy, not intractable, with status epilepticusG40.C09Lafora progressive myoclonus epilepsy, not intractable, without status epilepticusG40.C11Lafora progressive myoclonus epilepsy, intractable, with status epilepticusG40.C19Lafora progressive myoclonus epilepsy, intractable, without status epilepticusWhere G40 sits
- 1
Chapter 6
Diseases of the nervous system (G00-G99)
- 2
Section
Episodic and paroxysmal disorders (G40-G47)
- 3
Category G40
Epilepsy and recurrent seizures
- 4
Code G40
Epilepsy and recurrent seizures
Notes for this code
Inclusion terms
No inclusion terms are listed for G40.
Code first
No “code first” instruction is listed for G40.
Use additional code
No “use additional code” instruction is listed for G40.
Excludes1
Conditions that should not be reported together with this code.
- 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
Conditions not included here that may be reported separately when present.
- hippocampal sclerosis (G93.81)
- mesial temporal sclerosis (G93.81)
- temporal sclerosis (G93.81)
- Todd's paralysis (G83.84)
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code G40 mean?
G40 is the FY 2027 U.S. ICD-10-CM code for “Epilepsy and recurrent seizures.”
Is G40 a billable or specific ICD-10-CM code?
No. G40 has 58 billable codes beneath it in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is G40 located in ICD-10-CM?
G40 is listed in Chapter 6, Diseases of the nervous system (G00-G99), within Episodic and paroxysmal disorders (G40-G47) (G40–G47), under category G40, Epilepsy and recurrent seizures.
What coding notes are listed for G40?
No inclusion terms are listed for G40 in this reference record. No code-first instruction is listed. Excludes1 notes: 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 notes: hippocampal sclerosis (G93.81); mesial temporal sclerosis (G93.81); temporal sclerosis (G93.81); Todd's paralysis (G83.84).