10ICD Code Hub

G40.81

Header — not billable

Lennox-Gastaut syndrome

The ICD-10 code for lennox-gastaut syndrome is G40.81.

G40.81 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 4 more specific codes below.

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

Child codes under G40.81

Related codes in this category