Skip to main content
HCPCS J3475 · Level II · Part B drug

HCPCS J3475: Injection, magnesium sulfate, per 500 mg

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 J3475

Billing unit
500 MG
Inj magnesium sulfate
ASP payment limit
$0.436
October 2026; -2.2% vs July 2026
Practitioner MUE
20
MAI 3
OPPS status
SI N
NCCI exposure
no PTP pairs
Coverage articles
0
none list this code

TL;DR

HCPCS J3475 is the Level II code for Injection, magnesium sulfate, per 500 mg, billed per 500 MG. The Medicare Part B ASP payment limit for October 2026 is $0.436 per billing unit, down 2.2% from July 2026. The practitioner MUE allows up to 20 units per date of service (MAI 3). Under OPPS it carries status indicator N. J3475 is billed in units of 500 MG; 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 60 NDCs to it, sold as Magnesium Sulfate, Magnesium Sulfate-Dextrose, Magnesium Sulfate in 5% Dextrose by B. Braun Medical Inc., Baxter Healthcare Corporation, Henry Schein Inc.. No current Billing and Coding Article lists J3475, 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 J3475 at $0.436 per 500 MG for October 2026, derived from manufacturer average sales price plus 6%, compared with $0.446 in July 2026. Beneficiary coinsurance is 20%.

ASP payment limits for J3475
QuarterPayment limitPerCoinsurance
October 2026$0.436500 MG20%
July 2026$0.446500 MG—
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 60 NDCs from 15 labelers to J3475. Report the NDC in the claim's drug segment and bill the number of J3475 units that equals the quantity administered divided by 500 MG; the last column gives units per full package.

NDCs that crosswalk to J3475
NDCDrug nameLabelerPackage sizeBilling units / package
00264-4204-52Magnesium SulfateB. Braun Medical Inc.50 × 2496
00264-4205-52Magnesium SulfateB. Braun Medical Inc.50 × 24192
00264-4206-54Magnesium SulfateB. Braun Medical Inc.100 × 24192
00264-4400-54Magnesium Sulfate-DextroseB. Braun Medical Inc.100 × 2448
00338-1708-40Magnesium SulfateBaxter Healthcare Corporation50 × 40160
00338-1709-40Magnesium Sulfate-DextroseBaxter Healthcare Corporation100 × 4080
00338-1715-40Magnesium SulfateBaxter Healthcare Corporation100 × 40320
00338-1719-40Magnesium SulfateBaxter Healthcare Corporation50 × 40320
00338-6353-40Magnesium SulfateBaxter Healthcare Corporation100 × 40240
00404-9902-20Magnesium SulfateHenry Schein Inc.20 × 120
00404-9903-10Magnesium SulfateHenry Schein Inc.10 × 110
00404-9904-02Magnesium SulfateHenry Schein Inc.2 × 12
00409-1754-10Magnesium SulfatePfizer Inc10 × 10100
00409-2050-20Magnesium SulfatePfizer Inc500 × 20800
00409-2168-77Magnesium SulfatePfizer Inc20 × 25500
00409-3164-12Magnesium SulfatePfizer Inc1000 × 12960
00409-6727-23Magnesium Sulfate in 5% DextrosePfizer Inc100 × 2448
00409-6729-23Magnesium SulfatePfizer Inc100 × 24192
00409-6729-24Magnesium SulfatePfizer Inc50 × 2496
25021-0612-81Magnesium SulfateSagent Pharmaceuticals50 × 1040
25021-0612-82Magnesium SulfateSagent Pharmaceuticals100 × 1080
44567-0410-24Magnesium Sulfate-DextroseWG Critical Care, LLC100 × 2448
44567-0420-24Magnesium SulfateWG Critical Care, LLC50 × 2496
44567-0421-24Magnesium SulfateWG Critical Care, LLC100 × 24192
44567-0424-24Magnesium SulfateWG Critical Care, LLC50 × 24192
47335-0992-01Magnesium SulfateSun Pharmaceutical Global FZE.50 × 2496
47335-0992-02Magnesium SulfateSun Pharmaceutical Global FZE.100 × 24192
51662-1235-01Magnesium SulfateHF Acquisition Co. LLC, DBA HealthFirst10 × 110
51662-1235-03Magnesium SulfateHF Acquisition Co. LLC, DBA HealthFirst10 × 10100
51662-1352-01Magnesium SulfateHF Acquisition Co. LLC, DBA HealthFirst50 × 14
51662-1352-03Magnesium SulfateHF Acquisition Co. LLC, DBA HealthFirst50 × 2496
51662-1390-01Magnesium SulfateHF Acquisition Co. LLC, DBA HealthFirst2 × 12
51662-1390-03Magnesium SulfateHF Acquisition Co. LLC, DBA HealthFirst2 × 2550
51662-1451-01Magnesium SulfateHF Acquisition Co. LLC, DBA HealthFirst10 × 110
51754-1000-04Magnesium SulfateExela Pharma Sciences, LLC10 × 25250
63323-0064-03Magnesium SulfateFreseniUS Kabi USA, LLC2 × 2550
63323-0064-11Magnesium SulfateFreseniUS Kabi USA, LLC10 × 25250
63323-0064-23Magnesium SulfateFreseniUS Kabi USA, LLC2 × 2550
63323-0064-43Magnesium SulfateFreseniUS Kabi USA, LLC2 × 2550
63323-0106-01Magnesium SulfateFreseniUS Kabi USA, LLC100 × 24192
63323-0106-05Magnesium SulfateFreseniUS Kabi USA, LLC50 × 2496
63323-0106-10Magnesium SulfateFreseniUS Kabi USA, LLC1000 × 12960
63323-0106-15Magnesium SulfateFreseniUS Kabi USA, LLC500 × 24960
63323-0106-26Magnesium SulfateFreseniUS Kabi USA, LLC50 × 2496
63323-0107-05Magnesium SulfateFreseniUS Kabi USA, LLC50 × 24192
63323-0108-26Magnesium Sulfate-DextroseFreseniUS Kabi USA, LLC100 × 2448
63323-0642-20Magnesium SulfateFreseniUS Kabi USA, LLC20 × 25500
63323-0642-50Magnesium SulfateFreseniUS Kabi USA, LLC50 × 251250
67457-0567-00Magnesium Sulfate-DextroseMylan Institutional LLC100 × 2448
70121-1719-02Magnesium SulfateAmneal Pharmaceuticals, LLC50 × 1560
70121-1719-09Magnesium SulfateAmneal Pharmaceuticals, LLC50 × 2496
70121-1720-03Magnesium SulfateAmneal Pharmaceuticals, LLC100 × 1296
70121-1720-09Magnesium SulfateAmneal Pharmaceuticals, LLC100 × 24192
70860-0501-82Magnesium SulfateAthenex Pharmaceutical Division, LLC100 × 24192
70860-0502-81Magnesium SulfateAthenex Pharmaceutical Division, LLC50 × 24192
72572-0511-40Magnesium SulfateCivica, Inc.50 × 40160
83634-0500-81Magnesium SulfateAvenacy Inc.50 × 2496
83634-0500-82Magnesium SulfateAvenacy Inc.100 × 24192
83634-0501-81Magnesium SulfateAvenacy Inc.50 × 24192
83634-0500-83Magnesium SulfateAvenacy Inc.50 × 30120

Medically Unlikely Edits (MUE)

CMS publishes 3 MUE values for J3475. For practitioners the limit is 20 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 J3475 by setting
SettingMUE (units/DOS)MAICMS rationale
Practitioner services203 Date of Service Edit: ClinicalClinical: Data
Facility outpatient hospital803 Date of Service Edit: ClinicalClinical: Data
DME supplier03 Date of Service Edit: ClinicalCMS Policy

NCCI edits and add-on relationships

No active practitioner PTP pair lists J3475 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.

J3475 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 J3475 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, J3475 carries status indicator N. Status N means payment is packaged into the associated procedure and no separate OPPS payment is made.

Common denials for J3475 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 J3475 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.

Explore QuickCodeExplore QuickRCMBook a demo

Frequently asked questions — HCPCS J3475

What does HCPCS code J3475 describe?

J3475 is defined by CMS as "Injection, magnesium sulfate, per 500 mg". Each billing unit represents 500 MG, so the units reported on the claim must equal the dose administered divided by that unit.

What is the Medicare reimbursement for J3475 in October 2026?

The ASP-based payment limit is $0.436 per 500 MG, with 20% beneficiary coinsurance. Medicare Administrative Contractors apply this limit; commercial payers use their own fee schedules. The July 2026 limit was $0.446.

How many units of J3475 can be billed per day?

The practitioner Medically Unlikely Edit is 20 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 "Clinical: Data" as the rationale.

Which NDCs map to J3475?

The October 2026 ASP crosswalk lists 60 NDCs from 15 labelers: Magnesium Sulfate (B. Braun Medical Inc.); Magnesium Sulfate-Dextrose (B. Braun Medical Inc.); Magnesium Sulfate (Baxter Healthcare Corporation); Magnesium Sulfate-Dextrose (Baxter Healthcare Corporation). For example NDC 00264-4204-52 is a 50 package equal to 96 billing units. The crosswalk's billing-units-per-package figure converts each package into J3475 units.

Does J3475 have NCCI bundling edits?

No active practitioner PTP pairs list J3475 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.