I65.1

I65.1: Occlusion and stenosis of basilar artery

Billable / specific codeICD-10-CM

I65.1 is a billable, specific ICD-10-CM code for occlusion and stenosis of basilar artery. It is valid for submission on a claim.

Check I65.1 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above I65.1

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

I65.1 is named in 28 Medicare coverage policies: 28 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A52992Billing and Coding: Non-Invasive Cerebrovascular Arterial Studies
A56423Billing and Coding: Cardiology Non-emergent Outpatient Stress Testing
A56505Billing and Coding: Transesophageal Echocardiography (TEE)
A56551Billing and Coding: Visual Fields Testing

Alphabetic index entries that lead here

Embolism›basilar(artery)
Occlusion, occluded›artery›basilar

Code history

Unchanged in every release from FY2024 to FY2027.