ICD-10 G46
Non-Billable HeaderVascular syndromes of brain in cerebrovascular diseases
About ICD-10-CM G46
ICD-10-CM code G46 represents Vascular syndromes of brain in cerebrovascular diseases. This is a non-billable header code in the Nervous System chapter (block G46). The 2026 edition of ICD-10-CM G46 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.
Coding Notes
Code First
- underlying cerebrovascular disease (I60-I69)
Medicare LCD Coverage for G46
Local Coverage Determinations (LCDs) from CMS MACs that list G46 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 G46.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but G46 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with G46
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 G46
Other codes in section G40-G47 (Episodic and paroxysmal disorders).
ICD-10 G46, Billing FAQ
Is ICD-10 code G46 billable? +
No, G46 is a non-billable header code. Use a more specific child code from block G46 when submitting claims.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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