G40.811 – Lennox-Gastaut syndrome, not intractable, with status epilepticus
ICD-10-CM 2027 diagnosis code · Episodic and paroxysmal disorders
ICD-10-CM code
G40.811
- Code
G40.811(claims format:G40811)- Description
- Lennox-Gastaut syndrome, not intractable, with status epilepticus
- Short description
- Lennox-Gastaut syndrome, not intractable, w stat epi
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 6. Diseases of the nervous system (G00-G99)
- Block
- G40-G47 Episodic and paroxysmal disorders
- Parent codes
- G40 › G40.8 › G40.81
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
G40 – Epilepsy and recurrent seizures
Excludes1 (not coded here):
Excludes2 (not included here):
Notes:
- the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled
G40.8 – Other epilepsy and recurrent seizures
Applicable to:
- Epilepsies and epileptic syndromes undetermined as to whether they are focal or generalized
- Landau-Kleffner syndrome
Index terms for G40.811
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in G40.81
Frequently asked questions
What is ICD-10 code G40.811?
G40.811 is the ICD-10-CM code for lennox-Gastaut syndrome, not intractable, with status epilepticus, in the block G40-G47 (Episodic and paroxysmal disorders).
Is G40.811 a billable code?
Yes. G40.811 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does G40.811 belong to?
It belongs to category G40 – Epilepsy and recurrent seizures.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.