G40 is the ICD-10 code for Epilepsy. It is a three-character category divided into 10 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block G40–G47 (Episodic and paroxysmal disorders) in Chapter VI, Diseases of the nervous system.
- Code type
- Category (3 characters)
- Chapter
- VI · G00–G99
- Classification
- WHO ICD-10, 2019 version
What G40 excludes
Conditions that look similar but belong under another code.
Subcodes of G40
- G40.0Localization-related (focal)(partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset
- G40.1Localization-related (focal)(partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures
- G40.2Localization-related (focal)(partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures
- G40.3Generalized idiopathic epilepsy and epileptic syndromes
- G40.4Other generalized epilepsy and epileptic syndromes
- G40.5Special epileptic syndromes
- G40.6Grand mal seizures, unspecified (with or without petit mal)
- G40.7Petit mal, unspecified, without grand mal seizures
- G40.8Other epilepsy
- G40.9Epilepsy, unspecified
G40 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
G40Epilepsi
DG40Epilepsi
G40Epilepsia
G40Epilepsie
G40Epilepsie
G40epilepsie
Listed through more specific codes:
- G40.A01Absence epileptic syndrome, not intractable, with status epilepticus
- G40.A09Absence epileptic syndrome, not intractable, without status epilepticus
- G40.A11Absence epileptic syndrome, intractable, with status epilepticus
- G40.A19Absence epileptic syndrome, intractable, without status epilepticus
- G40.B01Juvenile myoclonic epilepsy, not intractable, with status epilepticus
- G40.B09Juvenile myoclonic epilepsy, not intractable, without status epilepticus
- G40.B11Juvenile myoclonic epilepsy, intractable, with status epilepticus
- G40.B19Juvenile myoclonic epilepsy, intractable, without status epilepticus
- and 4 more national subcodes
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
Look up another code
Stop looking codes up by hand
Docdemic listens to the consultation, writes the note and suggests the diagnosis and procedure codes that fit it, each one checked against your country’s official code list.
Try Docdemic free