ICD-10-CM 2027
ICD-10 code for petit mal seizure
From the official ICD-10-CM alphabetic index entry “Seizure (s) › petit mal”. Page updated September 29, 2026.
About coding petit mal seizure
The ICD-10-CM code for petit mal seizure is G40.A (Absence epileptic syndrome). The official index lists 6 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on G40.A.
Within G40 (epilepsy and recurrent seizures), G40.A is specifically for absence epileptic syndrome. Related codes cover Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset (G40.0), Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures (G40.1), Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures (G40.2), generalized idiopathic epilepsy and epileptic syndromes (G40.3), other generalized epilepsy and epileptic syndromes (G40.4), epileptic seizures related to external causes (G40.5), other epilepsy and recurrent seizures (G40.8), epilepsy, unspecified (G40.9) and 2 more.
To report this condition, pick the subcode that matches the documentation: G40.A0 (not intractable) and G40.A1 (intractable).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific petit mal seizure codes (official index)
- intractable G40.A1 — Absence epileptic syndrome, intractable
- with status epilepticus G40.A11 — Absence epileptic syndrome, intractable, with status epilepticus
- without status epilepticus G40.A19 — Absence epileptic syndrome, intractable, without status epilepticus
- not intractable G40.A0 — Absence epileptic syndrome, not intractable
- with status epilepticus G40.A01 — Absence epileptic syndrome, not intractable, with status epilepticus
- without status epilepticus G40.A09 — Absence epileptic syndrome, not intractable, without status epilepticus
Common questions about petit mal seizure ICD-10 codes
What is the ICD-10 code for petit mal seizure?
- G40.A — Absence epileptic syndrome (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: G40.A1, G40.A11, G40.A19, G40.A0 and others below.
What is the ICD-10 code for intractable petit mal seizure?
- G40.A1 — Absence epileptic syndrome, intractable (header code; choose a more specific subcode).
Is G40.A billable?
- No. G40.A is a header code. Report one of its more specific subcodes instead.