ICD-10 I65
Non-Billable HeaderOcclusion and stenosis of precerebral arteries, not resulting in cerebral infarction
About ICD-10-CM I65
ICD-10-CM code I65 represents Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction. This is a non-billable header code in the Circulatory System chapter (block I65). The 2026 edition of ICD-10-CM I65 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 I65. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- insufficiency, NOS, of precerebral artery (G45.-)
- insufficiency of precerebral arteries causing cerebral infarction (I63.0-I63.2)
Includes
- embolism of precerebral artery
- narrowing of precerebral artery
- obstruction (complete) (partial) of precerebral artery
- thrombosis of precerebral artery
Medicare LCD Coverage for I65
Local Coverage Determinations (LCDs) from CMS MACs that list I65 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 I65.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but I65 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with I65
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 I65
Other codes in section I60-I69 (Cerebrovascular diseases).
ICD-10 I65, Billing FAQ
Is ICD-10 code I65 billable? +
No, I65 is a non-billable header code. Use a more specific child code from block I65 when submitting claims.
What codes are Type 1 Excludes for I65? +
Type 1 Excludes (never code together with I65): insufficiency, NOS, of precerebral artery (G45.-); insufficiency of precerebral arteries causing cerebral infarction (I63.0-I63.2)
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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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