ICD10
ICD-10 Code G40.8: Other epilepsy and recurrent seizures
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).
When is it used?
- May be used when a clinician documents other epilepsy and recurrent seizures in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
Code hierarchy
chapter
6Diseases of the nervous system (G00-G99)
block
G40-G47Episodic and paroxysmal disorders
category
G40Epilepsy and recurrent seizures
currentG40
Official coding notes
Inclusion terms
- Epilepsies and epileptic syndromes undetermined as to whether they are focal or generalized
- Landau-Kleffner syndrome
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
NeurologistGeneral Physician
Related codes
Sibling codes
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.AAbsence epileptic syndromeG40.BJuvenile myoclonic epilepsy [impulsive petit mal]G40.CLafora progressive myoclonus epilepsyG40.4Other generalized epilepsy and epileptic syndromesG40.5Epileptic seizures related to external causesG40.9Epilepsy, unspecified
Mapped diagnoses and classifications
SNOMED_CT 1363250001high
Acute symptomatic epileptic seizure
Source: SNOMED International ICD-10 map
SNOMED_CT 1363253004high
Acute symptomatic epileptic seizure due to acute infection of central nervous system
Source: SNOMED International ICD-10 map
SNOMED_CT 1363252009high
Acute symptomatic epileptic seizure due to acute infectious disease
Source: SNOMED International ICD-10 map
SNOMED_CT 1363440000high
Acute symptomatic epileptic seizure due to cerebrovascular accident
Source: SNOMED International ICD-10 map
SNOMED_CT 1363497003high
Acute symptomatic epileptic seizure due to eclampsia
Source: SNOMED International ICD-10 map
SNOMED_CT 1363499000high
Acute symptomatic epileptic seizure due to hemorrhagic cerebrovascular accident
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
G40.8
Replacement codes
G40.89 — Other seizures
Common synonyms
Other epilepsy and recurrent seizures
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.