HCPCS Level II drug code
J2598 — Injection, vasopressin, 1 unit
In short
J2598 is the HCPCS Level II code for injection, vasopressin, 1 unit. CMS assigns NDCs for Vasopressin and Vasostrict to it. One billing unit is 1 unit. The Medicare Part B payment limit is $0.566 per unit (October 1, 2026 through December 31, 2026).
Code
CMS HCPCS file- Descriptor
- Injection, vasopressin, 1 unit
- Short descriptor
- Inj, vasopressin, 1 unit
- Code set
- HCPCS Level II, maintained by CMS
- Effective
- Jan 1, 2024
The billing unit is read from the descriptor. Confirm it against the CMS file before billing.
Medicare Part B payment limit
CMS ASP fileEffective 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
Units and claim line
Units = dose given ÷ 1 unit. For example, 100 unit is 100 units. Enter the dose to get the units and the NDC line for the CMS-1500 and the 837P.
Enter the dose given to build the claim line.
NDCs billed under J2598
CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 18 NDCs to J2598 for Vasopressin and Vasostrict. Billing units per package are CMS’s figures for this code’s unit.
| Drug | NDC (11-digit) | Labeler | Package | Billing units per package |
|---|---|---|---|---|
| Vasopressin | 00548-9701-00 | Amphastar Pharmaceuticals, Inc. | 10 × 1 | 200 |
| Vasopressin | 25021-0474-01 | Sagent Pharmaceuticals | 25 × 1 | 500 |
| Vasopressin | 43598-0914-06 | Dr. Reddy's Laboratories Inc. | 25 × 1 | 500 |
| Vasopressin | 43598-0914-25 | Dr. Reddy's Laboratories Inc. | 25 × 1 | 500 |
| Vasopressin | 55150-0370-24 | Eugia US LLC | 25 × 1 | 500 |
| Vasopressin | 55150-0370-25 | Eugia US LLC | 25 × 1 | 500 |
| Vasopressin | 63323-0930-01 | FreseniUS Kabi USA, LLC | 25 × 1 | 500 |
| Vasopressin | 65219-0039-01 | FreseniUS Kabi USA, LLC | 25 × 1 | 500 |
| Vasopressin | 70121-1642-05 | Amneal Pharmaceuticals, LLC | 25 × 1 | 500 |
| Vasopressin | 70121-1642-07 | Amneal Pharmaceuticals, LLC | 10 × 1 | 200 |
| Vasostrict | 42023-0164-10 | Endo USA, Inc. | 10 × 1 | 200 |
| Vasostrict | 42023-0164-25 | Endo USA, Inc. | 25 × 1 | 500 |
| Vasostrict | 42023-0164-83 | Endo USA, Inc. | 25 × 1 | 500 |
| Vasostrict | 42023-0190-01 | Endo USA, Inc. | 10 | 200 |
| Vasostrict | 42023-0219-10 | Endo USA, Inc. | 10 × 100 | 400 |
| Vasostrict | 42023-0237-10 | Endo USA, Inc. | 10 × 100 | 200 |
| Vasostrict | 51662-1314-01 | HF Acquisition Co. LLC, DBA HealthFirst | 1 | 20 |
| Vasostrict | 51662-1314-02 | HF Acquisition Co. LLC, DBA HealthFirst | 1 | 20 |
J2598: common questions
- Is J2598 a CPT code?
- No. J2598 is a HCPCS Level II code, maintained by CMS, that identifies the drug supplied. CPT codes are five-digit numbers from the AMA that describe services. Giving the drug, for example an injection or infusion, is usually reported with a separate CPT administration code. CPT codes for drug administration.
- What NDCs are billed under J2598?
- CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 18 NDCs under J2598, for Vasopressin and Vasostrict. The table on this page shows each one with its billing units per package.
- What is the Medicare payment limit for J2598?
- $0.566 per 1 unit, effective October 1, 2026 through December 31, 2026, from CMS's Part B drug payment limit file. Multiply by the units billed for the allowed amount before deductible and coinsurance. It is not a coverage decision.
- What is one billing unit of J2598?
- One unit of J2598 is 1 unit, as stated in the code's descriptor. Units to report = dose given ÷ 1 unit. J-code billing units.