G40.843
✓ Billable
KCNQ2-related epilepsy, intractable, with status epilepticus
ICD-10-CM · FY2026 · Diseases of the Nervous System
Code
G40.843
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Diseases of the Nervous System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code G40.843?
ICD-10-CM code G40.843 represents KCNQ2-related epilepsy, intractable, with status epilepticus. It is a billable diagnosis code in the Diseases of the Nervous System chapter, effective October 1, 2025 – September 30, 2026.
Is G40.843 billable?
Yes. G40.843 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is G40.843 in?
G40.843 belongs to the Diseases of the Nervous System chapter (G00–G99) of ICD-10-CM.
Related codes in the G40 category
G40
Epilepsy and recurrent seizures
Non-billable
G40.0
Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset
Non-billable
G40.1
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures
Non-billable
G40.2
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures
Non-billable
G40.3
Generalized idiopathic epilepsy and epileptic syndromes
Non-billable
G40.A
Absence epileptic syndrome
Non-billable
G40.B
Juvenile myoclonic epilepsy [impulsive petit mal]
Non-billable
G40.C
Lafora progressive myoclonus epilepsy
Non-billable
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