A9591 HCPCS Level II code: Fluoroestradiol f 18, diagnostic, 1 millicurie
A9591 is the HCPCS code for “Fluoroestradiol f 18, diagnostic, 1 millicurie” in CMS’s October 2026 release, in effect from Oct 1, 2026.
Official description
A9591Fluoroestradiol f 18, diagnostic, 1 millicurie
Short description: Fluoroestradiol f 18
HCPCS · United States
Medicare details
The indicators CMS publishes with A9591 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, 2021
Where A9591 sits
- 1A codesAmbulance, supplies and miscellaneous
- 2Active code A9591Fluoroestradiol f 18, diagnostic, 1 millicurie
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 A9591 mean?
A9591 is the HCPCS code for “Fluoroestradiol f 18, diagnostic, 1 millicurie” in CMS’s HCPCS Level II October 2026 release.
Does Medicare cover A9591?
CMS lists A9591’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 A9591
All A codesA9585Injection, gadobutrol, 0.1 mlA9586Florbetapir f18, diagnostic, per study dose, up to 10 millicuriesA9587Gallium ga-68, dotatate, diagnostic, 0.1 millicurieA9588Fluciclovine f-18, diagnostic, 1 millicurieA9589Instillation, hexaminolevulinate hydrochloride, 100 mgA9590Iodine i-131, iobenguane, 1 millicurieA9592Copper cu-64, dotatate, diagnostic, 1 millicurieA9593Gallium ga-68 psma-11, diagnostic, (ucsf), 1 millicurieA9594Gallium ga-68 psma-11, diagnostic, (ucla), 1 millicurieA9595Piflufolastat f 18 (pylarify), diagnostic, 1 millicurieA9596Gallium ga-68 gozetotide, diagnostic, (illuccix), 1 millicurieA9597Positron emission tomography radiopharmaceutical, diagnostic, for tumor identification, not otherwise classified