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G40.A

⚠ Non-billable (Header)

Absence epileptic syndrome

Diseases of the nervous system (G00-G99)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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Also Known As

Childhood absence epilepsy [pyknolepsy]Juvenile absence epilepsyAbsence epileptic syndrome, NOS

❌ Excludes1

inherited from G40

Rules 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 G40

Rules 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)

Child Codes (2)

G40.A0Absence epileptic syndrome, not intractableG40.A1Absence epileptic syndrome, intractable

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Code Information

CodeG40.A
BillableNo — Header code
ParentG40
CategoryDiseases of the nervous system (G00-G99)
Excludes15 rule(s)
Excludes24 note(s)
Child codes2

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)