A9558 – Xenon xe-133 gas, diagnostic, per 10 millicuries

HCPCS Level II code · A codes: Transportation, Medical & Surgical Supplies, Miscellaneous & Experimental

Active code Carrier judgment

HCPCS codeA9558
Long description
Xenon xe-133 gas, diagnostic, per 10 millicuries
Short description
Xe133 xenon 10mci
Pricing indicator
57 Other carrier priced
Medicare coverage
C Carrier judgment – coverage decided by the Medicare contractor
BETOS category
I1E Standard imaging - nuclear medicine
Added
January 1, 2006
Last change
January 1, 2006 – No change

Frequently asked questions

What is HCPCS code A9558?

A9558 is a HCPCS Level II code for xenon xe-133 gas, diagnostic, per 10 millicuries.

Does Medicare cover A9558?

The HCPCS file lists coverage code C: Carrier judgment – coverage decided by the Medicare contractor. Coverage and payment also depend on local coverage determinations and the patient’s plan.

Nearby A codes

Source: CMS HCPCS Level II quarterly file, October 2026. Reference only – check payer policy before billing.