Non-specific code icon 2014 ICD-10-CM Diagnosis Code G40.4

Other generalized epilepsy and epileptic syndromes

  • G40.4 is not a billable ICD-10-CM diagnosis code and cannot be used to indicate a medical diagnosis.
  • ICD-10-CM becomes effective on October 1, 2015, therefore, G40.4 and all ICD-10-CM diagnosis codes should only be used for training or planning purposes until then.
Clinical Information
  • A generalized tonic-clinic seizure, characterized by loss of consciousness. This type of seizure may be preceded by an aura and is frequently followed by a period of confusion and lethargy (post-ictal state).
  • A symptomatic form of epilepsy often preceded by an aura; characterized by loss of consciousness with generalized tonic- clonic seizures.
Applicable To
  • Epilepsy with grand mal seizures on awakening
  • Epilepsy with myoclonic absences
  • Epilepsy with myoclonic-astatic seizures
  • Grand mal seizure NOS
  • Nonspecific atonic epileptic seizures
  • Nonspecific clonic epileptic seizures
  • Nonspecific myoclonic epileptic seizures
  • Nonspecific tonic epileptic seizures
  • Nonspecific tonic-clonic epileptic seizures
  • Symptomatic early myoclonic encephalopathy
Mortality Data
  • Between 1999-2007 there were 137 deaths in the United States where ICD-10 G40.4 was indicated as the underlying cause of death [source: cdc.govlink to]
  • ICD-10 G40.4 as underlying cause of death data broken down by: gender, age, race, year