2022 ICD-10-CM Code G40.9

Epilepsy, unspecified

Version 2021

Not Valid for Submission

ICD-10:G40.9
Short Description:Epilepsy, unspecified
Long Description:Epilepsy, unspecified

Code Classification

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

G40.9 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of epilepsy, unspecified. The code is not specific and is NOT valid for the year 2022 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Unspecified diagnosis codes like G40.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Specific Coding for Epilepsy, unspecified

Non-specific codes like G40.9 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for epilepsy, unspecified:

  • NON-BILLABLE CODE - G40.90 for Epilepsy, unspecified, not intractable
  • BILLABLE CODE - Use G40.901 for Epilepsy, unspecified, not intractable, with status epilepticus
  • BILLABLE CODE - Use G40.909 for Epilepsy, unspecified, not intractable, without status epilepticus
  • NON-BILLABLE CODE - G40.91 for Epilepsy, unspecified, intractable
  • BILLABLE CODE - Use G40.911 for Epilepsy, unspecified, intractable, with status epilepticus
  • BILLABLE CODE - Use G40.919 for Epilepsy, unspecified, intractable, without status epilepticus

Clinical Information

Information for Patients


Epilepsy

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


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Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)