ICD-10 Diagnosis Code G40.509

Epileptic seiz rel to extrn causes, not ntrct, w/o stat epi

Diagnosis Code G40.509

ICD-10: G40.509
Short Description: Epileptic seiz rel to extrn causes, not ntrct, w/o stat epi
Long Description: Epileptic seizures related to external causes, not intractable, without status epilepticus
This is the 2019 version of the ICD-10-CM diagnosis code G40.509

Valid for Submission
The code G40.509 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Diseases of the nervous system (G00–G99)
    • Episodic and paroxysmal disorders (G40-G47)
      • Epilepsy and recurrent seizures (G40)

Information for Medical Professionals

Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Alcohol withdrawal-induced convulsion
  • Alcohol-induced epilepsy
  • Alcohol-related fit
  • Anxiolytic withdrawal
  • Drug-induced epilepsy
  • Drug-induced epilepsy
  • Drug-induced epilepsy
  • Hypnotic withdrawal
  • Narcotic withdrawal epilepsy
  • Opioid withdrawal
  • Post-traumatic epilepsy
  • Post-traumatic epilepsy, non-refractory
  • Seizure co-occurrent and due to anxiolytic withdrawal
  • Seizure co-occurrent and due to hypnotic withdrawal
  • Seizures due to metabolic disorder
  • Seizures in response to acute event
  • Situation-related seizures
  • Situation-related seizures
  • Stress seizure

Index of Diseases and Injuries
References found for the code G40.509 in the Index of Diseases and Injuries:

Information for Patients


Epilepsy is a brain disorder that causes people to have recurring seizures. The seizures happen when clusters of nerve cells, or neurons, in the brain send out the wrong signals. People may have strange sensations and emotions or behave strangely. They may have violent muscle spasms or lose consciousness.

Epilepsy has many possible causes, including illness, brain injury, and abnormal brain development. In many cases, the cause is unknown.

Doctors use brain scans and other tests to diagnose epilepsy. It is important to start treatment right away. There is no cure for epilepsy, but medicines can control seizures for most people. When medicines are not working well, surgery or implanted devices such as vagus nerve stimulators may help. Special diets can help some children with epilepsy.

NIH: National Institute of Neurological Disorders and Stroke

  • Brain surgery (Medical Encyclopedia)
  • EEG (Medical Encyclopedia)
  • Epilepsy (Medical Encyclopedia)
  • Epilepsy - children (Medical Encyclopedia)
  • Epilepsy - children - discharge (Medical Encyclopedia)
  • Epilepsy or seizures - discharge (Medical Encyclopedia)

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