ICDwise
I65 ⚠ Non-billable

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

ICD-10-CM · FY2026 · Diseases of the Circulatory System

Code
I65
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Circulatory System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Official coding notes

From CMS's ICD-10-CM Tabular List.

Includes
  • embolism of precerebral artery
  • narrowing of precerebral artery
  • obstruction (complete) (partial) of precerebral artery
  • thrombosis of precerebral artery
Excludes1 — never code together
  • 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?
ICD-10-CM code I65 represents Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Circulatory System chapter, effective October 1, 2025 – September 30, 2026.
Is I65 billable?
No. I65 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is I65 in?
I65 belongs to the Diseases of the Circulatory System chapter (I00–I99) of ICD-10-CM.

Related codes in the I65 category

I65.0 Occlusion and stenosis of vertebral artery Non-billable I65.1 Occlusion and stenosis of basilar artery Billable I65.2 Occlusion and stenosis of carotid artery Non-billable I65.8 Occlusion and stenosis of other precerebral arteries Billable I65.9 Occlusion and stenosis of unspecified precerebral artery Billable I65.01 Occlusion and stenosis of right vertebral artery Billable I65.02 Occlusion and stenosis of left vertebral artery Billable I65.03 Occlusion and stenosis of bilateral vertebral arteries Billable

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