ICD-10 G45
Non-Billable HeaderTransient cerebral ischemic attacks and related syndromes
About ICD-10-CM G45
ICD-10-CM code G45 represents Transient cerebral ischemic attacks and related syndromes. This is a non-billable header code in the Nervous System chapter (block G45). The 2026 edition of ICD-10-CM G45 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 G45. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- neonatal cerebral ischemia (P91.0)
- transient retinal artery occlusion (H34.0-)
Medicare LCD Coverage for G45
Local Coverage Determinations (LCDs) from CMS MACs that list G45 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 G45.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but G45 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with G45
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 G45
Other codes in section G40-G47 (Episodic and paroxysmal disorders).
ICD-10 G45, Billing FAQ
Is ICD-10 code G45 billable? +
No, G45 is a non-billable header code. Use a more specific child code from block G45 when submitting claims.
What codes are Type 1 Excludes for G45? +
Type 1 Excludes (never code together with G45): neonatal cerebral ischemia (P91.0); transient retinal artery occlusion (H34.0-)
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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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