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Home/Diagnosis/ICD-10 Coding for Generalized Seizure

ICD-10 Coding for Generalized Seizure

G40.401
G40.409
R56.9

Complete ICD-10-CM coding and documentation guide for icd-10 coding for generalized seizure includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
Grand Mal Seizure
Tonic-Clonic Seizure
Absence Seizure
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Key Information: ICD-10 Coding for Generalized Seizure

Essential facts and insights about ICD-10 Coding for Generalized Seizure

Use ICD-10 code G40.401 for generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticus, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticus

Billable Code
G40.401
Billable

Diagnostic Criteria

  • • Intractable seizures with status epilepticus confirmed by EEG

Applicable To

  • • Intractable generalized tonic-clonic seizures

Important Notes

  • • Ensure EEG and clinical documentation support the intractable status.

Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticus

Billable Code
G40.409
Billable

Diagnostic Criteria

  • • EEG showing generalized epileptiform activity
  • • Clinical history of controlled seizures

Applicable To

  • • Controlled generalized tonic-clonic seizures

Important Notes

  • • Ensure documentation reflects controlled seizure status.

Unspecified convulsions

Billable Code
R56.9
Billable

Diagnostic Criteria

  • • Clinical presentation of a single seizure event
  • • No history of recurrent seizures

Applicable To

  • • Single acute seizure

Important Notes

  • • Ensure the seizure is a single event without recurrence.
Ancillary Codes

Additional codes that may be used with this diagnosis

Z79.899

Other long term (current) drug therapy

Use to indicate ongoing antiepileptic drug therapy.

Frequently Asked Questions

What is the ICD-10 code for generalized seizure?

The ICD-10 code for generalized seizure is G40.4xx, which covers generalized epilepsy and recurrent seizures.

How do you code a single seizure event?

A single seizure event without a diagnosis of epilepsy is coded as R56.9 for unspecified convulsions.

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