G40.813
✓ Billable
Lennox-Gastaut syndrome, intractable, with status epilepticus
ICD-10-CM · FY2026 · Diseases of the Nervous System
Code
G40.813
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 G40.813?
ICD-10-CM code G40.813 represents Lennox-Gastaut syndrome, 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 G40.813 billable?
Yes. G40.813 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is G40.813 in?
G40.813 belongs to the Diseases of the Nervous System chapter (G00–G99) of ICD-10-CM.
Related codes in the G40 category
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G40.2
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G40.C
Lafora progressive myoclonus epilepsy
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