1. ICD-10-CM Codes
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2. G00-G99
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3. G40-G47
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4. G40-
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5. 2023 ICD-10-CM Diagnosis Code G40.909

2023 ICD-10-CM Diagnosis Code G40.909

Epilepsy, unspecified, not intractable, without status epilepticus

2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

• G40.909 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• Short description: Epilepsy, unsp, not intractable, without status epilepticus
• The 2023 edition of ICD-10-CM G40.909 became effective on October 1, 2022.
• This is the American ICD-10-CM version of G40.909 - other international versions of ICD-10 G40.909 may differ.

• Dementia due to epilepsy w behavioral disturbance
• Dementia due to epilepsy with behavior changes
• Epilepsy
• Epilepsy complicating period after childbirth
• Epilepsy in childbirth
• Epilepsy in pregnancy
• Epilepsy, generalized
• Epileptic dementia with behavioral disturbance
• First generalized onset seizure
• Generalized epilepsy
• Postpartum epilepsy
• Seizures, generalized 1st

• A brain disorder characterized by episodes of abnormally increased neuronal discharge resulting in transient episodes of sensory or motor neurological dysfunction, or psychic dysfunction. These episodes may or may not be associated with loss of consciousness or convulsions.
• 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)
• A disorder characterized by recurrent seizures
• A group of disorders marked by problems in the normal functioning of the brain. These problems can produce seizures, unusual body movements, a loss of consciousness or changes in consciousness, as well as mental problems or problems with the senses.
• Brain disorder characterized by recurring excessive neuronal discharge, exhibited by transient episodes of motor, sensory, or psychic dysfunction, with or without unconsciousness or convulsive movements.
• 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.

• 023 Craniotomy with major device implant or acute complex cns principal diagnosis with mcc or chemotherapy implant or epilepsy with neurostimulator
• 100 Seizures with mcc
• 101 Seizures without mcc

Convert G40.909 to ICD-9-CM

• 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
• 2017 (effective 10/1/2016): No change
• 2018 (effective 10/1/2017): No change
• 2019 (effective 10/1/2018): No change
• 2020 (effective 10/1/2019): No change
• 2021 (effective 10/1/2020): No change
• 2022 (effective 10/1/2021): No change
• 2023 (effective 10/1/2022): No change

• Type 1 Excludes: G40.89
  ICD-10-CM Diagnosis Code G40.89

  Other seizures

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Type 1 Excludes

  • post traumatic seizures (R56.1)
  • recurrent seizures NOS (G40.909)
  • seizure NOS (R56.9)

• Disorder (of) - see also Disease
  • seizure G40.909 - see also Epilepsy
• Epilepsy, epileptic, epilepsia (attack) (cerebral) (convulsion) (fit) (seizure) G40.909
  • not intractable G40.909
    • without status epilepticus G40.909
• Seizure(s) R56.9
  - see also Convulsions
  ICD-10-CM Diagnosis Code R56.9

  Unspecified convulsions

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Applicable To

  • Convulsion disorder
  • Fit NOS
  • Recurrent convulsions
  • Seizure(s) (convulsive) NOS
  • disorder G40.909 - see also Epilepsy
  • recurrent G40.909

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.