ICD-10 G40
Non-Billable HeaderEpilepsy and recurrent seizures
About ICD-10-CM G40
ICD-10-CM code G40 represents Epilepsy and recurrent seizures. This is a non-billable header code in the Nervous System chapter (block G40). The 2026 edition of ICD-10-CM G40 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Type 1 Excludes
Pure excludes, these codes can never be coded together with G40. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- conversion disorder with seizures (F44.5)
- convulsions NOS (R56.9)
- post traumatic seizures (R56.1)
- seizure (convulsive) NOS (R56.9)
- seizure of newborn (P90)
Type 2 Excludes
Not included here, the excluded code is not part of G40, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- hippocampal sclerosis (G93.81)
- mesial temporal sclerosis (G93.81)
- temporal sclerosis (G93.81)
- Todd's paralysis (G83.84)
Medicare LCD Coverage for G40
Local Coverage Determinations (LCDs) from CMS MACs that list G40 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing G40.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but G40 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with G40
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To G40
Other codes in section G40-G47 (Episodic and paroxysmal disorders).
ICD-10 G40, Billing FAQ
Is ICD-10 code G40 billable? +
No, G40 is a non-billable header code. Use a more specific child code from block G40 when submitting claims.
What codes are Type 1 Excludes for G40? +
Type 1 Excludes (never code together with G40): conversion disorder with seizures (F44.5); convulsions NOS (R56.9); post traumatic seizures (R56.1)
What codes are Type 2 Excludes for G40? +
Type 2 Excludes (may be coded together when both conditions exist): hippocampal sclerosis (G93.81); mesial temporal sclerosis (G93.81); temporal sclerosis (G93.81)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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