In short

Vasopressin (American Regent) is billed under HCPCS J2599 — Injection, vasopressin (american regent), not therapeutically equivalent to j2598, 1 unit. One billing unit is 1 unit. CMS's crosswalk lists 2 Vasopressin (American Regent) NDCs under this code.

J2599 code details

Reference

J2599
Injection, vasopressin (american regent), not therapeutically equivalent to j2598, 1 unitBilling unit: 1 unit
Labelers
American Regent, Inc.

Medicare Part B payment limit

CMS ASP file
Payment limit per unit$0.574
Per1 unit
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

Vasopressin (American Regent) units and claim line

Enter the dose given to get the J2599 units and the NDC line for the CMS-1500 and the 837P.

Enter the dose given to build the claim line.

Vasopressin (American Regent) 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.

Vasopressin (American Regent) NDCs in the CMS ASP crosswalk
NDC (11-digit)HCPCSLabelerPackageBilling units per package
00517-1020-25J2599American Regent, Inc.25 × 1500
00517-1030-01J2599American Regent, Inc.10200

Vasopressin (American Regent): common questions

What is the J-code for Vasopressin (American Regent)?
Vasopressin (American Regent) is billed under HCPCS J2599 — Injection, vasopressin (american regent), not therapeutically equivalent to j2598, 1 unit. One billing unit is 1 unit. CMS's crosswalk lists 2 Vasopressin (American Regent) NDCs under this code.
How many J2599 billing units are in a package of Vasopressin (American Regent)?
CMS lists 200 to 500 billing units per package, depending on the NDC, where one unit is 1 unit. Units to report are based on the dose given, not the package.
Is J2599 a CPT code?
No. J2599 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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