A9521 HCPCS Level II code: Technetium tc-99m exametazime, diagnostic, per study dose, up to 25 millicuries
A9521 is the HCPCS code for “Technetium tc-99m exametazime, diagnostic, per study dose, up to 25 millicuries” in CMS’s October 2026 release, in effect from Oct 1, 2026.
Official description
A9521Technetium tc-99m exametazime, diagnostic, per study dose, up to 25 millicuries
Short description: Tc99m exametazime
HCPCS · United States
Medicare details
The indicators CMS publishes with A9521 in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Carrier judgment
- Medicare pricing
- Other carrier priced
- ASC
- Approved for ambulatory surgical centers
- Type of service
- Diagnostic radiology
- BETOS category
- Standard imaging - nuclear medicine
- Added
- Jan 1, 2003
Where A9521 sits
- 1A codesAmbulance, supplies and miscellaneous
- 2Active code A9521Technetium tc-99m exametazime, diagnostic, per study dose, up to 25 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 A9521 mean?
A9521 is the HCPCS code for “Technetium tc-99m exametazime, diagnostic, per study dose, up to 25 millicuries” in CMS’s HCPCS Level II October 2026 release.
Does Medicare cover A9521?
CMS lists A9521’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 A9521
All A codesA9512Technetium tc-99m pertechnetate, diagnostic, per millicurieA9513Lutetium lu 177, dotatate, therapeutic, 1 millicurieA9515Choline c-11, diagnostic, per study dose up to 20 millicuriesA9516Iodine i-123 sodium iodide, diagnostic, per 100 microcuries, up to 999 microcuriesA9517Iodine i-131 sodium iodide capsule(s), therapeutic, per millicurieA9520Technetium tc-99m tilmanocept, diagnostic, up to 0.5 millicuriesA9524Iodine i-131 iodinated serum albumin, diagnostic, per 5 microcuriesA9526Nitrogen n-13 ammonia, diagnostic, per study dose, up to 40 millicuriesA9527Iodine i-125, sodium iodide solution, therapeutic, per millicurieA9528Iodine i-131 sodium iodide capsule(s), diagnostic, per millicurieA9529Iodine i-131 sodium iodide solution, diagnostic, per millicurieA9530Iodine i-131 sodium iodide solution, therapeutic, per millicurie