A9558 HCPCS Level II code: Xenon xe-133 gas, diagnostic, per 10 millicuries
A9558 is the HCPCS code for “Xenon xe-133 gas, diagnostic, per 10 millicuries” in CMS’s October 2026 release, in effect from Oct 1, 2026.
Official description
A9558Xenon xe-133 gas, diagnostic, per 10 millicuries
Short description: Xe133 xenon 10mci
HCPCS · United States
Medicare details
The indicators CMS publishes with A9558 in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Carrier judgment
- Medicare pricing
- Other carrier priced
- Type of service
- Diagnostic radiology
- BETOS category
- Standard imaging - nuclear medicine
- Added
- Jan 1, 2006
Where A9558 sits
- 1A codesAmbulance, supplies and miscellaneous
- 2Active code A9558Xenon xe-133 gas, diagnostic, per 10 millicuries
Source and release
- Data release
- HCPCS Level II · October 2026
- Effective date
- Oct 1, 2026
- Publisher
- CMS
This page is built from the HCPCS Level II catalog that Vero Codes reads when it suggests codes: Centers for Medicare & Medicaid Services’s October 2026 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does HCPCS code A9558 mean?
A9558 is the HCPCS code for “Xenon xe-133 gas, diagnostic, per 10 millicuries” in CMS’s HCPCS Level II October 2026 release.
Does Medicare cover A9558?
CMS lists A9558’s Medicare coverage as “Carrier judgment” and its pricing as “Other carrier priced”. Coverage and payment still depend on the patient, the setting, the documentation and the payer.
Which HCPCS Level II release does this page use?
It uses CMS’s October 2026 release, in effect from Oct 1, 2026 to Dec 31, 2026. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside A9558
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