Non-specific code icon 2015 ICD-10-CM Diagnosis Code G40.4

Other generalized epilepsy and epileptic syndromes

    2015 Non-Billable Code

  • G40.4 is not a billable ICD-10-CM diagnosis code and cannot be used to indicate a medical diagnosis.
  • On October 1, 2015 ICD-10-CM will replace ICD-9-CM in the United States, therefore, G40.4 - and all other ICD-10-CM codes - should only be used for training or planning purposes until then.
  • This is the American ICD-10-CM version of G40.4. Other international ICD-10 versions may differ.

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