I66.3

I66.3: Occlusion and stenosis of cerebellar arteries

Billable / specific codeICD-10-CM

I66.3 is a billable, specific ICD-10-CM code for occlusion and stenosis of cerebellar arteries. It is valid for submission on a claim.

Check I66.3 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above I66.3

A category’s note binds every code beneath it.

Written on I66: Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction

Occlusion and stenosis of cerebral artery causing cerebral infarction (I63.3-I63.5)

Risk adjustment

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

Medicare coverage

I66.3 is named in 38 Medicare coverage policies: 38 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A52868Billing and Coding: Transesophageal Echocardiography (TEE)
A52992Billing and Coding: Non-Invasive Cerebrovascular Arterial Studies
A56423Billing and Coding: Cardiology Non-emergent Outpatient Stress Testing
A56476Billing and Coding: Cardiac Radionuclide Imaging

Alphabetic index entries that lead here

Thrombosis, thrombotic›cerebellar artery(anterior inferior) (posterior inferior) (superior)
Embolism›artery›cerebellar(anterior inferior) (posterior inferior) (superior)
Occlusion, occluded›artery›cerebellar(anterior inferior) (posterior inferior) (superior)

Code history

Unchanged in every release from FY2024 to FY2027.