G40.4

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

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.

Details

• G40.4 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.

• The 2023 edition of ICD-10-CM G40.4 became effective on October 1, 2022.

• This is the American ICD-10-CM version of G40.4 – other international versions of ICD-10 G40.4 may differ.