G40.5
⚠ Non-billable (Header)Epileptic seizures related to external causes
Diseases of the nervous system (G00-G99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
Also Known As
Epileptic seizures related to alcoholEpileptic seizures related to drugsEpileptic seizures related to hormonal changesEpileptic seizures related to sleep deprivationEpileptic seizures related to stress
📋 Code Instructions
- • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
❌ Excludes1
inherited from G40Rules from parent category G40: Epilepsy and recurrent seizures
- • 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
inherited from G40Rules from parent category G40: Epilepsy and recurrent seizures
- • hippocampal sclerosis (G93.81)
- • mesial temporal sclerosis (G93.81)
- • temporal sclerosis (G93.81)
- • Todd's paralysis (G83.84)
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Open in Checker →Code Information
CodeG40.5
BillableNo — Header code
ParentG40
CategoryDiseases of the nervous system (G00-G99)
Excludes15 rule(s)
Excludes24 note(s)
Child codes1
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)