Documentation and Coding for Epilepsy, Seizure Disorders & Convulsions

January 18, 2023
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A quick reference guide to assist with accurate, complete documentation and coding that reflects the true nature of a patient’s current health status at the highest level of specificity. Per ICD-10 official guidelines for reporting and coding “The importance of consistent, complete documentation in the medical record cannot be overemphasized. Without such documentation, accurate coding cannot be achieved.”

Documentation & Coding Tips

Documentation needs to be clear and detailed using the following terms to allow accurate ICD10 code selection

Seizure Classes:

  • Focal/partial (localization-related) seizures: start in one part of the brain and spread to others. The person may notice minor symptoms and feel that something is about to happen. As it spreads across the brain, more symptoms occur.
  • Generalized seizures: surges of abnormal nerve discharges throughout the cortex of the brain, at the same time. Includes terms such as absence (petit mal), myoclonic, tonic, atonic, clonic, and tonic-clonic (grand mal)

Specificity:

  • Intractability:

    • Not Intractable
    • Intractable: equivalent terms include pharmacologically resistant, treatment resistant, refractory (medically) and poorly controlled
  • Status epilepticus: with or without

  • Causative factors: alcohol, drugs, hormonal changes, sleep deprivation, stress, idiopathic, etc.

Documentation: Medications, treatment & response

  • Epilepsy is incurable but can be controlled or limited by medications, diet, devices, or surgical techniques
  • historical seizure/convulsion only, not ongoing
ICD-10 Description Example of when to use codes in this category
G40.1xx Localization-related (focal)(partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures
G40.2xx Localization-related (focal)(partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures
G40.3xx Generalized idiopathic epilepsy and epileptic syndromes, not intractable
G40.A0x Absence epileptic syndrome Includes Petit Mal
G40.4xx Other generalized epilepsy and epileptic syndromes Includes Grand Mal Seizure, unspecified
G40.5xx Epileptic seizures related to external causes
G40.8xx Other epilepsy
G40.909 Epilepsy unspecified, not intractable, without status epilepticus Includes recurrent seizures & seizure disorder unspecified
R56.1 Post-traumatic seizures
R56.9 Seizure (convulsion), unspecified

Resources:

  • Optum 360 Encoder Pro.com
  • Hopkins Medicine.org
  • ICD-10-CM 2022 Coding Manual