G40.3
Non-billableGeneralized idiopathic epilepsy and epileptic syndromes
Generalized idiopathic epilepsy and epileptic syndromes
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •hippocampal sclerosisG93.81
- •mesial temporal sclerosisG93.81
- •temporal sclerosisG93.81
- •Todd's paralysisG83.84
Code Also
A second code may be required; sequencing depends on circumstances
Child Codes (2)
Related Codes(10)
G40.0Local-rel (focal) idio epilepsy w seizures of loc onset
G40.1Local-rel (focal) symptc epilepsy w simple partial seizures
G40.2Local-rel (focal) symptc epilepsy w complex partial seizures
G40.4Other generalized epilepsy and epileptic syndromes
G40.5Epileptic seizures related to external causes
G40.8Other epilepsy and recurrent seizures
G40.9Epilepsy, unspecified
G40.AAbsence epileptic syndrome
G40.BJuvenile myoclonic epilepsy [impulsive petit mal]
G40.CLafora progressive myoclonus epilepsy
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(17)
UMLS
- EIGC0270850
- EPILEPSY, IDIOPATHIC GENERALIZEDC0270850
- Epilepsy, Idiopathic GeneralizedC0270850
- Generalized idiopathic epilepsy and epileptic syndromesC0270850
- Generalized idiopathic epilepsy and epileptic syndromes NOSC0270850
- IDIOPATHIC GENERALIZED EPILEPSYC0270850
- IGEC0270850
- IGE - idiopathic generalised epilepsyC0270850
- IGE - idiopathic generalized epilepsyC0270850
- Idiopathic Generalized EpilepsyC0270850
- Idiopathic generalised epilepsyC0270850
- Idiopathic generalized epilepsyC0270850
- Idiopathic generalized epilepsy (disorder)C0270850
- epilepsies generalised idiopathicC0270850
- epilepsy generalized primaryC0270850
- idiopathic generalized epilepsyC0270850
- primary generalized epilepsyC0270850
Frequently Asked Questions
What is the ICD-10 code for generalized idiopathic epilepsy and epileptic syndromes?
The ICD-10-CM code for generalized idiopathic epilepsy and epileptic syndromes is G40.3. The full clinical description is "Generalized idiopathic epilepsy and epileptic syndromes". G40.3 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code G40.3 mean?
ICD-10-CM code G40.3 represents “Generalized idiopathic epilepsy and epileptic syndromes”. It is classified under Chapter 6: Diseases of the Nervous System and is a non-billable header code. Use a more specific child code for billing purposes.
Is G40.3 a billable code?
No, G40.3 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 2 child codes under G40.3.
What chapter is G40.3 in?
G40.3 is in Chapter 6: Diseases of the Nervous System (codes G00-G99).
What codes cannot be used with G40.3?
G40.3 has Excludes1 notes indicating codes that cannot be used together with it, including: conversion disorder with seizures (F44.5); convulsions NOS (R56.9); post traumatic seizures (R56.1); and 2 more.
What are the subcategories under G40.3?
G40.3 has 2 child codes, including: G40.30 (Generalized idiopathic epilepsy, not intractable), G40.31 (Generalized idiopathic epilepsy, intractable).
What are the UMLS CUIs for G40.3?
G40.3 is linked to 1 UMLS Concept Unique Identifier: C0270850. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does G40.3 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like generalized idiopathic epilepsy and epileptic syndromes affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of G40.3?
G40.3 maps to the ICD-11 code: 8A61.Z (Genetic or presumed genetic syndromes primarily expressed as epilepsy, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.