I65.9

I65.9: Occlusion and stenosis of unspecified precerebral artery

Billable / specific codeICD-10-CM

I65.9 is a billable, specific ICD-10-CM code for occlusion and stenosis of unspecified precerebral artery. It is valid for submission on a claim.

Check I65.9 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Occlusion and stenosis of precerebral artery NOS

Excludes1 inherited from the categories above I65.9

A category’s note binds every code beneath it.

Written on I65: Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

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

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

I65.9 is named in 11 Medicare coverage policies: 11 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A56551Billing and Coding: Visual Fields Testing
A56697Billing and Coding: Non-Invasive Vascular Studies
A56722Billing and Coding: Intraoperative Neurophysiological Testing
A56799Billing and Coding: Visual Fields Testing

Alphabetic index entries that lead here

Occlusion, occluded›artery›precerebral

Code history

Unchanged in every release from FY2024 to FY2027.