2026 ICD-10-CM Diagnosis Code G40.89Other seizures

AHRQ’s CCSR groups this code into broader clinical categories.

• Alcohol Withdrawal Seizures

  a condition where seizures occur in association with ethanol abuse (alcoholism) without other identifiable causes. seizures usually occur within the first 6-48 hours after the cessation of alcohol intake, but may occur during periods of alcohol intoxication. single generalized tonic-clonic motor seizures are the most common subtype, however, status epilepticus may occur. (adams et al., principles of neurology, 6th ed, p1174)

• Epilepsies, Partial

  conditions characterized by recurrent paroxysmal neuronal discharges which arise from a focal region of the brain. partial seizures are divided into simple and complex, depending on whether consciousness is unaltered (simple partial seizure) or disturbed (complex partial seizure). both types may feature a wide variety of motor, sensory, and autonomic symptoms. partial seizures may be classified by associated clinical features or anatomic location of the seizure focus. a secondary generalized seizure refers to a partial seizure that spreads to involve the brain diffusely. (from adams et al., principles of neurology, 6th ed, pp317)

• Epilepsy, Benign Neonatal

  a condition marked by recurrent seizures that occur during the first 4-6 weeks of life despite an otherwise benign neonatal course. autosomal dominant familial and sporadic forms have been identified. seizures generally consist of brief episodes of tonic posturing and other movements, apnea, eye deviations, and blood pressure fluctuations. these tend to remit after the 6th week of life. the risk of developing epilepsy at an older age is moderately increased in the familial form of this disorder. (neurologia 1996 feb;11(2):51-5)

• Epilepsy, Partial, Motor

  a disorder characterized by recurrent localized paroxysmal discharges of cerebral neurons that give rise to seizures that have motor manifestations. the majority of partial motor seizures originate in the frontal lobe (see also epilepsy, frontal lobe). motor seizures may manifest as tonic or clonic movements involving the face, one limb or one side of the body. a variety of more complex patterns of movement, including abnormal posturing of extremities, may also occur.

• Epilepsy, Partial, Sensory

  a disorder characterized by recurrent focal onset seizures which have sensory (i.e., olfactory, visual, tactile, gustatory, or auditory) manifestations. partial seizures that feature alterations of consciousness are referred to as complex partial seizures (epilepsy, complex partial).

• Epilepsy, Post-Traumatic

  recurrent seizures causally related to craniocerebral trauma. seizure onset may be immediate but is typically delayed for several days after the injury and may not occur for up to two years. the majority of seizures have a focal onset that correlates clinically with the site of brain injury. cerebral cortex injuries caused by a penetrating foreign object (craniocerebral trauma, penetrating) are more likely than closed head injuries (head injuries, closed) to be associated with epilepsy. concussive convulsions are nonepileptic phenomena that occur immediately after head injury and are characterized by tonic and clonic movements. (from rev neurol 1998 feb;26(150):256-261; sports med 1998 feb;25(2):131-6)

• Seizures

  clinical or subclinical disturbances of cortical function due to a sudden, abnormal, excessive, and disorganized discharge of brain cells. clinical manifestations include abnormal motor, sensory and psychic phenomena. recurrent seizures are usually referred to as epilepsy or seizure disorder.

• Seizures, Febrile

  seizures that occur during a febrile episode. it is a common condition, affecting 2-5% of children aged 3 months to five years. an autosomal dominant pattern of inheritance has been identified in some families. the majority are simple febrile seizures (generally defined as generalized onset, single seizures with a duration of less than 30 minutes). complex febrile seizures are characterized by focal onset, duration greater than 30 minutes, and/or more than one seizure in a 24 hour period. the likelihood of developing epilepsy (i.e., a nonfebrile seizure disorder) following simple febrile seizures is low. complex febrile seizures are associated with a moderately increased incidence of epilepsy. (from menkes, textbook of child neurology, 5th ed, p784)

• Spasms, Infantile

  an epileptic syndrome characterized by the triad of infantile spasms, hypsarrhythmia, and arrest of psychomotor development at seizure onset. the majority present between 3-12 months of age, with spasms consisting of combinations of brief flexor or extensor movements of the head, trunk, and limbs. the condition is divided into two forms: cryptogenic (idiopathic) and symptomatic (secondary to a known disease process such as intrauterine infections; nervous system abnormalities; brain diseases, metabolic, inborn; prematurity; perinatal asphyxia; tuberous sclerosis; etc.). (from menkes, textbook of child neurology, 5th ed, pp744-8)

• Epilepsy

  a disorder characterized by recurrent episodes of paroxysmal brain dysfunction due to a sudden, disorderly, and excessive neuronal discharge. epilepsy classification systems are generally based upon: (1) clinical features of the seizure episodes (e.g., motor seizure), (2) etiology (e.g., post-traumatic), (3) anatomic site of seizure origin (e.g., frontal lobe seizure), (4) tendency to spread to other structures in the brain, and (5) temporal patterns (e.g., nocturnal epilepsy). (from adams et al., principles of neurology, 6th ed, p313)

Seizures

Seizures are symptoms of a brain problem. They happen because of sudden, abnormal electrical activity in the brain. When people think of seizures, they often think of convulsions in which a person's body shakes rapidly and uncontrollably. Not all seizures cause convulsions. There are many types of seizures and some have mild symptoms.

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