2025 ICD-10-CM Diagnosis Code G40.843

by

KCNQ2-related epilepsy, intractable, with status epilepticus

  • G40.843 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • ICD-10-CM G40.843 is a new 2025 ICD-10-CM code that became effective on October 1, 2024.
  • This is the American ICD-10-CM version of G40.843 – other international versions of ICD-10 G40.843 may differ.

ICD-10-CM Coding Rules

  • G40.843 is applicable to pediatric patients aged 0 – 17 years inclusive.

The following code(s) above G40.843 contain annotation back-references

 that may be applicable to G40.843:

  • G00-G99  Diseases of the nervous system
  • G40  Epilepsy and recurrent seizures
  • G40.8  Other epilepsy and recurrent seizures

ICD-10-CM G40.843 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

  • 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

Code History

  • 2025 (effective 10/1/2024): New code

Diagnosis Index entries containing back-references to G40.843:

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