In short

Injectafer is billed under HCPCS J1439 — Injection, ferric carboxymaltose, 1 mg. One billing unit is 1 mg. CMS's crosswalk lists 3 Injectafer NDCs under this code.

J1439 code details

Reference

J1439
Injection, ferric carboxymaltose, 1 mgBilling unit: 1 mg
Labelers
American Regent, Inc.

Medicare Part B payment limit

CMS ASP file
Payment limit per unit$1.121
Per1 mg
Coinsurance20%

Effective October 1, 2026 through December 31, 2026. Payment allowance limits subject to the ASP methodology are based on 2Q26 ASP data. A payment limit is not a coverage decision; the Medicare contractor decides coverage. CMS ASP pricing files

Injectafer units and claim line

Enter the dose given to get the J1439 units and the NDC line for the CMS-1500 and the 837P.

Enter the dose given to build the claim line.

Injectafer NDCs and billing units

From CMS’s ASP NDC–HCPCS crosswalk, effective October 1, 2026 through December 31, 2026. Billing units per package are CMS’s figures for the code’s unit.

Injectafer NDCs in the CMS ASP crosswalk
NDC (11-digit)HCPCSLabelerPackageBilling units per package
00517-0602-01J1439American Regent, Inc.2100
00517-0620-01J1439American Regent, Inc.201000
00517-0650-01J1439American Regent, Inc.15750

Injectafer: common questions

What is the J-code for Injectafer?
Injectafer is billed under HCPCS J1439 — Injection, ferric carboxymaltose, 1 mg. One billing unit is 1 mg. CMS's crosswalk lists 3 Injectafer NDCs under this code.
How many J1439 billing units are in a package of Injectafer?
CMS lists 100 to 1,000 billing units per package, depending on the NDC, where one unit is 1 mg. Units to report are based on the dose given, not the package.
Is J1439 a CPT code?
No. J1439 is a HCPCS Level II code from CMS for the drug itself. Giving it, for example by injection or infusion, is usually reported with a separate CPT administration code.

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