G40.30

Generalized idiopathic epilepsy and epileptic syndromes, not intractable

FY2027Chapter 6: Diseases of the nervous system/G40–G47 Episodic and paroxysmal disorders

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

G40.30 is a non-billable ICD-10-CM code header for generalized idiopathic epilepsy and epileptic syndromes, not intractable. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are G40.301 Generalized idiopathic epilepsy and epileptic syndromes, not intractable, with status epilepticus and G40.309 Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticus. Its coding notes include a Code also instruction, 5 Excludes1 entries and 12 Excludes2 entries.

Code also

Two codes may be needed to describe the condition. This note gives no sequencing order.

Inherited from G40.3 Generalized idiopathic epilepsy and epileptic syndromes
  • MERRF syndrome, if applicable (E88.42)

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Inherited from 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

Not included here. Both codes may be reported if the patient has both conditions.

Inherited from G40 Epilepsy and recurrent seizures
Also from chapter/block level (8 notes)
Inherited from Chapter 6 Diseases of the nervous system
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Inclusion terms

Conditions classified to this code.

This code
  • Generalized idiopathic epilepsy and epileptic syndromes without intractability

Notes

Inherited from G40 Epilepsy and recurrent seizures
  • the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled

More specific codes under G40.30 2