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HCPCS J2598 · Level II · Part B drug

HCPCS J2598: Injection, vasopressin, 1 unit

Reviewed by QuickIntell RCM Editorial Team · Last reviewed

Data effective
Data currency: ASP payment limits October 2026 (effective October 1, 2026); MUE and NCCI edits 2026 Q4 (effective October 1, 2026); OPPS Addendum B July 2026 (effective July 1, 2026). Next CMS release: January 1, 2027 (ASP, MUE, NCCI and OPPS quarterly updates).

Key facts for J2598

Billing unit
1 UNIT
Inj, vasopressin, 1 unit
ASP payment limit
$0.566
October 2026; +15.5% vs July 2026
Practitioner MUE
160
MAI 3
OPPS status
SI N
NCCI exposure
no PTP pairs
Coverage articles
0
none list this code

TL;DR

HCPCS J2598 is the Level II code for Injection, vasopressin, 1 unit, billed per 1 UNIT. The Medicare Part B ASP payment limit for October 2026 is $0.566 per billing unit, up 15.5% from July 2026. The practitioner MUE allows up to 160 units per date of service (MAI 3). Under OPPS it carries status indicator N. J2598 is billed in units of 1 UNIT; the quantity administered, the NDC package and the units on the claim must reconcile, which is the check that prevents CARC 16 and 151 returns on this line. The ASP crosswalk maps 18 NDCs to it, sold as Vasopressin, Vasostrict by Amphastar Pharmaceuticals, Inc., Sagent Pharmaceuticals, Endo USA, Inc.. No current Billing and Coding Article lists J2598, so coverage follows the FDA label, compendia and any applicable NCD.

Medicare Part B payment limit (ASP)

CMS sets the Part B payment limit for J2598 at $0.566 per 1 UNIT for October 2026, derived from manufacturer average sales price plus 6%, compared with $0.49 in July 2026. Beneficiary coinsurance is 20%.

ASP payment limits for J2598
QuarterPayment limitPerCoinsurance
October 2026$0.5661 UNIT20%
July 2026$0.491 UNIT—
Source: CMS Medicare Part B Drug Payment Limit File. Commercial and Medicaid payers set their own rates.

NDC to HCPCS billing-unit conversion

The October 2026 ASP crosswalk maps 18 NDCs from 8 labelers to J2598. Report the NDC in the claim's drug segment and bill the number of J2598 units that equals the quantity administered divided by 1 UNIT; the last column gives units per full package.

NDCs that crosswalk to J2598
NDCDrug nameLabelerPackage sizeBilling units / package
00548-9701-00VasopressinAmphastar Pharmaceuticals, Inc.1 × 10200
25021-0474-01VasopressinSagent Pharmaceuticals1 × 25500
42023-0164-10VasostrictEndo USA, Inc.1 × 10200
42023-0164-25VasostrictEndo USA, Inc.1 × 25500
42023-0164-83VasostrictEndo USA, Inc.1 × 25500
42023-0190-01VasostrictEndo USA, Inc.10 × 1200
42023-0219-10VasostrictEndo USA, Inc.100 × 10400
42023-0237-10VasostrictEndo USA, Inc.100 × 10200
43598-0914-06VasopressinDr. Reddy's Laboratories Inc.1 × 25500
43598-0914-25VasopressinDr. Reddy's Laboratories Inc.1 × 25500
51662-1314-01VasostrictHF Acquisition Co. LLC, DBA HealthFirst1 × 120
51662-1314-02VasostrictHF Acquisition Co. LLC, DBA HealthFirst1 × 120
55150-0370-24VasopressinEugia US LLC1 × 25500
55150-0370-25VasopressinEugia US LLC1 × 25500
63323-0930-01VasopressinFreseniUS Kabi USA, LLC1 × 25500
65219-0039-01VasopressinFreseniUS Kabi USA, LLC1 × 25500
70121-1642-05VasopressinAmneal Pharmaceuticals, LLC1 × 25500
70121-1642-07VasopressinAmneal Pharmaceuticals, LLC1 × 10200

Medically Unlikely Edits (MUE)

CMS publishes 3 MUE values for J2598. For practitioners the limit is 160 units per date of service with adjudication indicator 3, a date-of-service clinical edit: units above the limit deny but can be paid on appeal with documentation that the quantity was medically reasonable.

MUE values for J2598 by setting
SettingMUE (units/DOS)MAICMS rationale
Practitioner services1603 Date of Service Edit: ClinicalPrescribing Information
Facility outpatient hospital1603 Date of Service Edit: ClinicalPrescribing Information
DME supplier1603 Date of Service Edit: ClinicalPrescribing Information

NCCI edits and add-on relationships

No active practitioner PTP pair lists J2598 as a column-1 or column-2 code in v323r0. Drug supply codes are rarely bundled; the administration codes billed with them are where PTP edits usually apply.

J2598 is neither an add-on code nor a designated primary code in the 2026 Q4 NCCI add-on edit file.

Medicare coverage articles

No current Billing and Coding Article lists J2598 in its HCPCS table. Coverage then follows the drug's FDA label, compendia and any National Coverage Determination; check the Medicare Coverage Database before administering off-label.

Hospital outpatient (OPPS) status

In the July 2026 OPPS Addendum B, J2598 carries status indicator N. Status N means payment is packaged into the associated procedure and no separate OPPS payment is made.

Common denials for J2598 and how to prevent them

CARC 16 · M119

NDC missing, invalid or not matched to the HCPCS code

CARC 151 · N362

units billed exceed the MUE for the date of service

CARC 50 · N115

diagnosis not covered by the applicable coverage article or LCD

How QuickIntell checks J2598 before the claim leaves

QuickCode validates the NDC-to-unit conversion against the current ASP crosswalk, checks units against every published MUE setting and flags PTP and add-on conflicts on the same claim. QuickRCM routes CARC 16, 151 and 50 denials on drug lines with the matching coverage article attached so the appeal starts with evidence.

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Frequently asked questions — HCPCS J2598

What does HCPCS code J2598 describe?

J2598 is defined by CMS as "Injection, vasopressin, 1 unit". Each billing unit represents 1 UNIT, so the units reported on the claim must equal the dose administered divided by that unit.

What is the Medicare reimbursement for J2598 in October 2026?

The ASP-based payment limit is $0.566 per 1 UNIT, with 20% beneficiary coinsurance. Medicare Administrative Contractors apply this limit; commercial payers use their own fee schedules. The July 2026 limit was $0.49.

How many units of J2598 can be billed per day?

The practitioner Medically Unlikely Edit is 160 units per date of service with adjudication indicator 3 (3 Date of Service Edit: Clinical). MAI 3 edits can be appealed with documentation that the units were medically reasonable. CMS cites "Prescribing Information" as the rationale.

Which NDCs map to J2598?

The October 2026 ASP crosswalk lists 18 NDCs from 8 labelers: Vasopressin (Amphastar Pharmaceuticals, Inc.); Vasopressin (Sagent Pharmaceuticals); Vasostrict (Endo USA, Inc.); Vasopressin (Dr. Reddy's Laboratories Inc.). For example NDC 00548-9701-00 is a 1 package equal to 200 billing units. The crosswalk's billing-units-per-package figure converts each package into J2598 units.

Does J2598 have NCCI bundling edits?

No active practitioner PTP pairs list J2598 as a column-1 or column-2 code in the v323r0 release. Unit limits (MUE) and medical-necessity coverage rules still apply.

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-01. Verify against the primary file before billing or contracting decisions.

Disclaimer

This page is an operational reference compiled from CMS publications: the Medicare Part B drug payment limit and NDC crosswalk files, NCCI MUE and add-on edit tables, aggregate PTP statistics, OPPS Addendum B and the Medicare Coverage Database. Payment limits are Medicare national amounts; commercial and Medicaid payers differ. CPT codes are shown as numbers only; CPT descriptors are copyright AMA. Nothing here is legal, clinical or billing advice.