G45.1

G45.1: Carotid artery syndrome (hemispheric)

Billable / specific codeICD-10-CM

G45.1 is a billable, specific ICD-10-CM code for carotid artery syndrome (hemispheric). It is valid for submission on a claim.

Check G45.1 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above G45.1

A category’s note binds every code beneath it.

Written on G45: Transient cerebral ischemic attacks and related syndromes

neonatal cerebral ischemia (P91.0)
transient retinal artery occlusion (H34.0-)

Other codes that can never be billed with G45.1

Their own Excludes1 notes name this code, so the conflict is not listed above.

I65Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

Risk adjustment

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

Medicare coverage

G45.1 is named in 34 Medicare coverage policies: 34 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
A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
A56476Billing and Coding: Cardiac Radionuclide Imaging

Alphabetic index entries that lead here

Insufficiency, insufficient›arterial›carotid(hemispheric)
Syndrome›carotid›artery(hemispheric) (internal)

Code history

Unchanged in every release from FY2024 to FY2027.