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I65

Non-billable

Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

I65 is the ICD-10-CM code for Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction. It is a non-billable category code — use a more specific child code such as I65.0 for billing.

Status
Header (non-billable)
Chapter
I00-I99
Subcodes
5
Edition
FY2026

I00-I99 Diseases of the circulatory system

Includes

  • •embolism of precerebral artery
  • •narrowing of precerebral artery
  • •obstruction (complete) (partial) of precerebral artery
  • •thrombosis of precerebral artery

Excludes1 — not coded here

  • •insufficiency, NOS, of precerebral artery (G45.-)
  • •insufficiency of precerebral arteries causing cerebral infarction (I63.0-I63.2)

Frequently asked questions

What is ICD-10 code I65?
I65 is the ICD-10-CM code for "Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction". It falls under I00-I99 Diseases of the circulatory system.
Is I65 a billable code?
No — I65 is a non-billable header code. Use a more specific child code (such as I65.0) for billing.
What are the subcodes of I65?
I65 has 5 more specific child codes, including I65.0, I65.1, I65.2.
What is excluded from I65?
Excludes1 (not coded here): insufficiency, NOS, of precerebral artery (G45.-); insufficiency of precerebral arteries causing cerebral infarction (I63.0-I63.2).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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