Seizure Disorder ICD-10-CM Codes | 2025

Which seizure disorder ICD codes are billable? 

R56.1, R56.00, R56.01, R56.9, G40.89 and more specific codes under G40.0 to G40.5 are billable. 

Clinical information

• Seizures are sudden, uncontrolled electrical disturbances in the brain that can cause changes in muscle tone, movement, awareness, consciousness, or sensations.
• There are two main types of seizures: focal/partial and generalized-onset. Depending on its location in the brain, severity, or cause, a seizure can fall under one or the other category.
• Signs someone is having a seizure include loss of consciousness, confusion upon awakening, muscle spasms, frothing at the mouth, teeth clenching, tongue biting, loss of bladder or bowel function, unusual noises, and falling.
• Common causes include brain infection/injury, substance/alcohol use/withdrawal, epilepsy, fever, post-traumatic brain injury, stroke, brain tumor, low blood glucose levels, and electric shock. Genetic factors may also predispose individuals to seizure disorders.
• Short-term effects include physical injury during the seizure. Long-term effects, especially with prolonged or frequent seizures, can include cognitive impairment, mental health problems, status epilepticus (a medical emergency), coma, or premature death.
• Diagnosis typically involves a medical history review (including seizure precursors and symptoms), blood tests, a spinal tap, toxicology screening, an electroencephalogram (EEG), CT scans, and MRI scans.
• Treatments include dietary modifications (such as ketogenic diet), anti-epileptic medications, and, for intractable cases, brain surgery and nerve stimulation techniques.

Synonyms include

• Posttraumatic seizure
• Simple partial seizure with motor dysfunction
• Lennox-Gastaut syndrome
• Dravet syndrome
• Auditory seizure
• Epileptic convulsions
• Convulsion disorder