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

What this means — in plain language

MedlinePlus · NIH

What are vascular diseases? Your vascular system is your body's network of blood vessels. It includes your: Arteries, which carry oxygen-rich blood from your heart to your tissues and organs Veins, which carry the blood and waste products back to your heart Capillaries, which are tiny blood vessels that connect your small arteries to your small veins. The walls of the capillaries are thin and leaky, to allow for an…

Read more about Vascular Diseases at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

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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