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J3475

J3475 – Injection, magnesium sulfate, per 500 mg · NDC Crosswalk & Billing Units

HCPCS Level II J-code · Medicare Part B drug billing

J-code ● 82 NDCs crosswalked per 500 MG $0.446/unit ASP+6%

This page is curated, coded, and maintained by Dr. Brian Staiger, PharmD

Compiled from public FDA, CMS, DailyMed, NADAC, and related drug data sources. Editorial policy

📋 J3475 summary

J3475 is a HCPCS Level II J-code used to bill magnesium sulfate, per 500 mg, billed per 500 MG. The number of billing units to report depends on the dose administered and the NDC/package billed — use the calculator below.

Brand names associated with J3475: Magnesium Sulfate-D5W*, Magnesium Sulfate In Water, Magnesium Sulfate In Dextrose

Code J3475 Billing unit 500 MG Payment limit $0.446/unit NDC-Crosswalk 82 Quarter Q3 2026 RxCUI Atlas Trace the drug concept →

⚠ An NDC↔HCPCS crosswalk and a published payment limit do not guarantee payer coverage or payment. Always verify the current payer policy and claim format before billing.

🗂️ Key billing facts

HCPCS codeJ3475

DescriptorInjection, magnesium sulfate, per 500 mg

Billing unit500 MG

Payment limit / unit$0.446

Est. ASP / unit$0.421 est.

Mapped NDCs82

Data periodQ3 2026

Last updated2026-08-20

🧾 Billing & reimbursement HCPCS · CMS · EFF. Q3 2026

📅 Payment limits effective Q3 2026 — from the CMS Medicare Part B Payment Limit File (revised quarterly).

Medicare payment limit / unit

$0.446

Est. ASP / unit

$0.421 est.

Est. after 2% sequester

$0.437

HCPCS dosage

500 MG

The CMS payment limit is the Medicare Part B drug allowance (ASP + 6%, statutory). After the 2% federal sequester the effective payment is ≈ ASP + 4.3%; estimated ASP = payment limit ÷ 1.06. Source: CMS Medicare Part B Payment Limit File (quarterly), Q3 2026.

Full HCPCS code details (official CMS record)

Long descriptionInjection, magnesium sulfate, per 500 mg

CoverageD — Special coverage instructions apply

Pricing indicator51 — Drug — priced under the ASP methodology

Type of service1 — Medical care

BETOS-2O1E

ASC payment group—

Action codeN — No maintenance this year

Effective date1997-01-01

Date added1996-01-01

Source: CMS HCPCS Level II code file (imported via admin).

🧮 Dosing & billing-units calculator HCPCS UNITS

One billing unit of J3475 = 500 mg. Enter a regimen to convert dose → billing units and project a full course.

Dose per administration (mg) Frequency — every days Number of doses NDC / package billed (optional)

Billing units = dose ÷ HCPCS unit size. Most payers require whole units — round per the payer's policy. “Est. Medicare pay” uses the current payment limit. For single-dose vials, drug discarded after administration may be separately billable with modifier JW (JZ when none is discarded) where allowed. Always verify payer-specific rounding before billing.

🔁 NDCs that bill under J3475 WITH EST. MEDICARE PAY

82 NDCs map to J3475. Bill units = how many HCPCS units one package represents. Est. pay / pkg = payment limit ($0.446/unit) × that package's bill units.

NDC (11-digit)	Drug	Labeler	Package	Strength	Bill units	Est. pay / pkg	NADAC / unit	Status	Source
00264-4204-52	Magnesium Sulfate in Water magnesium sulfate heptahydrate 2 g/50mL INJECTION, SOLUTION	B.	24 CONTAINER in 1 CASE (0264-4204-52) / 5...	2 g/50mL	96	$42.82	—	● Active	CMS + PDAC
00264-4205-52	Magnesium Sulfate in Water magnesium sulfate heptahydrate 4 g/50mL INJECTION, SOLUTION	B.	24 CONTAINER in 1 CASE (0264-4205-52) / 5...	4 g/50mL	192	$85.63	—	● Active	CMS + PDAC
00264-4206-54	Magnesium Sulfate in Water magnesium sulfate heptahydrate 4 g/100mL INJECTION, SOLUTION	B.	24 CONTAINER in 1 CASE (0264-4206-54) / 1...	4 g/100mL	192	$85.63	—	● Active	CMS + PDAC
00264-4400-54	Magnesium Sulfate in Dextrose magnesium sulfate heptahydrate 10 mg/mL INJECTION, SOLUTION	B.	24 CONTAINER in 1 CASE (0264-4400-54) / 1...	10 mg/mL	48	$21.41	—	● Active	CMS + PDAC
00338-1708-40	Magnesium Sulfate 2 g/50mL INJECTION, SOLUTION	Baxter	40 BAG in 1 CARTON (0338-1708-40) / 50 mL...	2 g/50mL	160	$71.36	—	● Active	CMS + PDAC
00338-1709-40	MAGNESIUM SULFATE IN DEXTROSE 10 mg/mL INJECTION, SOLUTION	Baxter	40 BAG in 1 CASE (0338-1709-40) / 100 mL...	10 mg/mL	80	$35.68	—	● Active	CMS + PDAC
00338-1715-40	Magnesium Sulfate 4 g/100mL INJECTION, SOLUTION	Baxter	40 BAG in 1 CARTON (0338-1715-40) / 100 m...	4 g/100mL	320	$142.72	—	● Active	CMS + PDAC
00338-1719-40	Magnesium Sulfate 4 g/50mL INJECTION, SOLUTION	Baxter	40 BAG in 1 CARTON (0338-1719-40) / 50 mL...	4 g/50mL	320	$142.72	—	● Active	CMS + PDAC
00338-6353-40	Magnesium Sulfate 3 g/100mL INJECTION, SOLUTION	Baxter	40 BAG in 1 CARTON (0338-6353-40) / 100 m...	3 g/100mL	240	$107.04	—	● Active	CMS ASP
00404-9902-20	Magnesium Sulfate 500 mg/mL INJECTION, SOLUTION	Henry	1 VIAL, SINGLE-DOSE in 1 BAG (0404-9902-20...	500 mg/mL	20	$8.92	—	● Active	CMS ASP
00404-9903-10	Magnesium Sulfate 500 mg/mL INJECTION, SOLUTION	Henry	1 SYRINGE, PLASTIC in 1 BAG (0404-9903-10)...	500 mg/mL	10	$4.46	—	● Active	CMS ASP
00404-9904-02	Magnesium Sulfate 500 mg/mL INJECTION, SOLUTION	Henry	1 VIAL, SINGLE-DOSE in 1 BAG (0404-9904-02...	500 mg/mL	2	$0.89	—	● Active	CMS ASP
00409-1754-10	Magnesium Sulfate 500 mg/mL INJECTION, SOLUTION	Hospira,	10 CARTON in 1 PACKAGE (0409-1754-10) / 1...	500 mg/mL	100	$44.60	—	● Active	CMS + PDAC
00409-2050-20	Magnesium Sulfate in Water 20 g/500mL INJECTION, SOLUTION	Hospira,	20 POUCH in 1 CASE (0409-2050-20) / 1 BAG...	20 g/500mL	800	$356.80	—	● Active	CMS + PDAC
00409-2168-77	Magnesium Sulfate 500 mg/mL INJECTION, SOLUTION	Hospira,	25 VIAL, PLASTIC in 1 TRAY (0409-2168-77)...	500 mg/mL	500	$223.00	—	● Active	CMS + PDAC
00409-3164-12	Magnesium Sulfate in Water 40 g/1000mL INJECTION, SOLUTION	Hospira,	12 POUCH in 1 CASE (0409-3164-12) / 1 BAG...	40 g/1000mL	960	$428.16	—	● Active	CMS + PDAC
00409-6727-23	Magnesium Sulfate in Dextrose 10 mg/mL INJECTION, SOLUTION	Hospira,	24 POUCH in 1 CASE (0409-6727-23) / 1 BAG...	10 mg/mL	48	$21.41	—	● Active	CMS + PDAC
00409-6729-23	Magnesium Sulfate in Water 40 mg/mL INJECTION, SOLUTION	Hospira,	24 POUCH in 1 CASE (0409-6729-23) / 1 BAG...	40 mg/mL	192	$85.63	—	● Active	CMS + PDAC
00409-6729-24	Magnesium Sulfate in Water 40 mg/mL INJECTION, SOLUTION	Hospira,	24 POUCH in 1 CASE (0409-6729-24) / 1 BAG...	40 mg/mL	96	$42.82	—	● Active	CMS + PDAC
25021-0612-81	Magnesium Sulfate 40 mg/mL INJECTION, SOLUTION	Sagent	10 BAG in 1 CARTON (25021-612-81) / 50 mL...	40 mg/mL	40	$17.84	—	● Active	CMS + PDAC
25021-0612-82	Magnesium Sulfate 40 mg/mL INJECTION, SOLUTION	Sagent	10 BAG in 1 CARTON (25021-612-82) / 100 m...	40 mg/mL	80	$35.68	—	● Active	CMS + PDAC
44567-0410-24	Magnesium Sulfate in Dextrose 1 g/100mL INJECTION	WG	24 BAG in 1 CARTON (44567-410-24) / 100 m...	1 g/100mL	48	$21.41	—	● Active	CMS + PDAC
44567-0420-24	Magnesium Sulfate in Water 2 g/50mL INJECTION	WG	24 POUCH in 1 CARTON (44567-420-24) / 1 B...	2 g/50mL	96	$42.82	—	● Active	CMS + PDAC
44567-0421-24	Magnesium Sulfate in Water 4 g/100mL INJECTION	WG	24 POUCH in 1 CARTON (44567-421-24) / 1 B...	4 g/100mL	192	$85.63	—	● Active	CMS + PDAC
44567-0424-24	Magnesium Sulfate in Water 4 g/50mL INJECTION	WG	24 POUCH in 1 CARTON (44567-424-24) / 1 B...	4 g/50mL	192	$85.63	—	● Active	CMS + PDAC
47335-0992-01	MAGNESIUM SULFATE 40 mg/mL INJECTION, SOLUTION	Sun	24 POUCH in 1 CASE (47335-992-01) / 1 BAG...	40 mg/mL	96	$42.82	—	● Active	CMS + PDAC
47335-0992-02	MAGNESIUM SULFATE 40 mg/mL INJECTION, SOLUTION	Sun	24 POUCH in 1 CASE (47335-992-02) / 1 BAG...	40 mg/mL	192	$85.63	—	● Active	CMS + PDAC
51662-1235-01	50% MAGNESIUM SULFATE 500 mg/mL INJECTION, SOLUTION	HF	1 SYRINGE, PLASTIC in 1 CARTON (51662-1235...	500 mg/mL	10	$4.46	—	● Active	CMS ASP
51662-1235-03	50% MAGNESIUM SULFATE 500 mg/mL INJECTION, SOLUTION	HF	10 POUCH in 1 CASE (51662-1235-3) / 1 CAR...	500 mg/mL	100	$44.60	—	● Active	CMS ASP
51662-1352-01	MAGNESIUM SULFATE 40 mg/mL INJECTION, SOLUTION	HF	50 mL in 1 BAG (51662-1352-1)	40 mg/mL	4	$1.78	—	● Active	CMS ASP
51662-1352-03	MAGNESIUM SULFATE 40 mg/mL INJECTION, SOLUTION	HF	24 POUCH in 1 CASE (51662-1352-3) / 1 BAG...	40 mg/mL	96	$42.82	—	● Active	CMS ASP
51662-1390-01	MAGNESIUM SULFATE 500 mg/mL INJECTION, SOLUTION	HF	2 mL in 1 VIAL, SINGLE-DOSE (51662-1390-1)	500 mg/mL	2	$0.89	—	● Active	CMS ASP
51662-1390-03	MAGNESIUM SULFATE 500 mg/mL INJECTION, SOLUTION	HF	25 POUCH in 1 CASE (51662-1390-3) / 1 VIA...	500 mg/mL	50	$22.30	—	● Active	CMS ASP
51662-1451-01	Magnesium Sulfate	HF	—	—	10	$4.46	—	—	CMS ASP
51754-1000-04	Magnesium Sulfate	Exela	—	—	250	$111.50	—	—	CMS + PDAC
63323-0064-03	Magnesium Sulfate 500 mg/mL INJECTION, SOLUTION	Fresenius	25 VIAL, SINGLE-DOSE in 1 CARTON (63323-06...	500 mg/mL	50	$22.30	—	● Active	CMS + PDAC
63323-0064-11	Magnesium Sulfate 500 mg/mL INJECTION, SOLUTION	Fresenius	25 VIAL, SINGLE-DOSE in 1 TRAY (63323-064-...	500 mg/mL	250	$111.50	—	● Active	CMS + PDAC
63323-0064-23	Magnesium Sulfate 500 mg/mL INJECTION, SOLUTION	Fresenius	25 VIAL, GLASS in 1 TRAY (63323-064-23) /...	500 mg/mL	50	$22.30	—	● Active	CMS + PDAC
63323-0064-43	Magnesium Sulfate 500 mg/mL INJECTION, SOLUTION	Fresenius	25 VIAL, GLASS in 1 TRAY (63323-064-43) /...	500 mg/mL	50	$22.30	—	● Active	CMS + PDAC
63323-0106-01	magnesium sulfate 40 mg/mL INJECTION, SOLUTION	Fresenius	24 BAG in 1 CASE (63323-106-01) / 100 mL...	40 mg/mL	192	$85.63	—	● Active	CMS + PDAC
63323-0106-05	magnesium sulfate 40 mg/mL INJECTION, SOLUTION	Fresenius	24 BAG in 1 CASE (63323-106-05) / 50 mL i...	40 mg/mL	96	$42.82	—	● Active	CMS + PDAC
63323-0106-10	magnesium sulfate 40 mg/mL INJECTION, SOLUTION	Fresenius	24 BAG in 1 CASE (63323-106-10) / 1000 mL...	40 mg/mL	960	$428.16	—	● Active	CMS + PDAC
63323-0106-15	magnesium sulfate 40 mg/mL INJECTION, SOLUTION	Fresenius	24 BAG in 1 CASE (63323-106-15) / 500 mL...	40 mg/mL	960	$428.16	—	● Active	CMS + PDAC
63323-0106-26	magnesium sulfate 40 mg/mL INJECTION, SOLUTION	Fresenius	24 BAG in 1 CASE (63323-106-26) / 50 mL i...	40 mg/mL	96	$42.82	—	● Active	CMS + PDAC
63323-0107-05	magnesium sulfate 80 mg/mL INJECTION, SOLUTION	Fresenius	24 BAG in 1 CASE (63323-107-05) / 50 mL i...	80 mg/mL	192	$85.63	—	● Active	CMS + PDAC
63323-0108-26	Magnesium Sulfate in 5% Dextrose Magnesium Sulfate Heptahydrate 1 g/100mL INJECTION, SOLUTION	Fresenius	24 BAG in 1 CASE (63323-108-26) / 100 mL...	1 g/100mL	48	$21.41	—	● Active	CMS + PDAC
63323-0642-20	Magnesium Sulfate 500 mg/mL INJECTION, SOLUTION	Fresenius	25 VIAL, SINGLE-DOSE in 1 TRAY (63323-642-...	500 mg/mL	500	$223.00	—	● Active	CMS + PDAC
63323-0642-50	Magnesium Sulfate 500 mg/mL INJECTION, SOLUTION	Fresenius	25 VIAL, SINGLE-DOSE in 1 CARTON (63323-64...	500 mg/mL	1,250	$557.50	—	● Active	CMS + PDAC
67457-0554-00	Magnesium Sulfate	Mylan	—	—	192	$85.63	—	—	CMS + PDAC
67457-0567-00	Magnesium Sulfate-Dextrose	Mylan	—	—	48	$21.41	—	—	CMS + PDAC
70121-1719-02	Magnesium Sulfate 40 mg/mL INJECTION	Amneal	15 POUCH in 1 CARTON (70121-1719-2) / 1 B...	40 mg/mL	60	$26.76	—	● Active	CMS + PDAC
70121-1719-09	Magnesium Sulfate 40 mg/mL INJECTION	Amneal	24 POUCH in 1 CARTON (70121-1719-9) / 1 B...	40 mg/mL	96	$42.82	—	● Active	CMS + PDAC
70121-1720-03	Magnesium Sulfate 40 mg/mL INJECTION	Amneal	12 POUCH in 1 CARTON (70121-1720-3) / 1 B...	40 mg/mL	96	$42.82	—	● Active	CMS + PDAC
70121-1720-09	Magnesium Sulfate 40 mg/mL INJECTION	Amneal	24 POUCH in 1 CARTON (70121-1720-9) / 1 B...	40 mg/mL	192	$85.63	—	● Active	CMS + PDAC
70860-0501-82	Magnesium Sulfate in Water 40 mg/mL INJECTION, SOLUTION	Athenex	24 POUCH in 1 CARTON (70860-501-82) / 1 B...	40 mg/mL	192	$85.63	—	● Active	CMS ASP
70860-0502-81	Magnesium Sulfate in Water 80 mg/mL INJECTION, SOLUTION	Athenex	24 POUCH in 1 CARTON (70860-502-81) / 1 B...	80 mg/mL	192	$85.63	—	● Active	CMS ASP
72572-0511-40	Magnesium Sulfate 2 g/50mL INJECTION, SOLUTION	Civica,	40 BAG in 1 CARTON (72572-511-40) / 50 mL...	2 g/50mL	160	$71.36	—	● Active	CMS + PDAC
83634-0500-81	Magnesium Sulfate in Water 40 mg/mL INJECTION, SOLUTION	Avenacy,	24 POUCH in 1 CARTON (83634-500-81) / 1 B...	40 mg/mL	96	$42.82	—	● Active	CMS + PDAC
83634-0500-82	Magnesium Sulfate in Water 40 mg/mL INJECTION, SOLUTION	Avenacy,	24 POUCH in 1 CARTON (83634-500-82) / 1 B...	40 mg/mL	192	$85.63	—	● Active	CMS + PDAC
83634-0501-81	Magnesium Sulfate in Water 80 mg/mL INJECTION, SOLUTION	Avenacy,	24 POUCH in 1 CARTON (83634-501-81) / 1 B...	80 mg/mL	192	$85.63	—	● Active	CMS + PDAC
83634-0500-83	Magnesium Sulfate in Water 40 mg/mL INJECTION, SOLUTION	Avenacy,	30 POUCH in 1 CARTON (83634-500-83) / 1 B...	40 mg/mL	0.08	$0.04	—	● Active	PDAC
31722-0394-32	Magnesium Sulfate 500 mg/mL INJECTION, SOLUTION	Camber	25 VIAL, SINGLE-DOSE in 1 CARTON (31722-39...	500 mg/mL	1	$0.45	—	● Active	PDAC
31722-0394-33	Magnesium Sulfate 500 mg/mL INJECTION, SOLUTION	Camber	25 VIAL, SINGLE-DOSE in 1 CARTON (31722-39...	500 mg/mL	1	$0.45	—	● Active	PDAC
31722-0394-34	Magnesium Sulfate 500 mg/mL INJECTION, SOLUTION	Camber	25 VIAL, SINGLE-DOSE in 1 CARTON (31722-39...	500 mg/mL	1	$0.45	—	● Active	PDAC
31722-0394-35	Magnesium Sulfate 500 mg/mL INJECTION, SOLUTION	Camber	25 VIAL, SINGLE-DOSE in 1 CARTON (31722-39...	500 mg/mL	1	$0.45	—	● Active	PDAC
00409-6730-60	MAGNESIUM SULFATE (SDC,PF,LATEX-FREE) 80 MG/1 ML	Unknown	—	—	0.16	$0.07	—	—	PDAC
00409-6727-50	MAGNESIUM SULFATE-DEXTROSE (SDC,PF,LATEX-FREE) 5%-1 GM/100 ML	Unknown	—	—	0.02	$0.01	—	—	PDAC
00409-5239-60	MAGNESIUM SULFATE (SDC,PF,LATEX-FREE) 40 MG/1 ML	Unknown	—	—	0.08	$0.04	—	—	PDAC
00409-4121-50	MAGNESIUM SULFATE (SDC,PF,LATEX-FREE) 40 MG/1 ML	Unknown	—	—	0.08	$0.04	—	—	PDAC
67457-0553-00	MAGNESIUM SULFATE (24X50ML;SINGLE DOSE) 40 MG/1 ML	Unknown	—	—	0.08	$0.04	—	—	PDAC
63323-0108-01	Magnesium Sulfate in 5% Dextrose Magnesium Sulfate Heptahydrate 1 g/100mL INJECTION, SOLUTION	Fresenius	24 BAG in 1 CASE (63323-108-01) / 100 mL...	1 g/100mL	0.02	$0.01	—	● Active	PDAC
51927-2732-00	MAGNESIUM SULFATE (USP; HEPTAHYDRATE)	Unknown	—	—	2	$0.89	—	—	PDAC
63323-0064-10	MAGNESIUM SULFATE (S.D.V.,P.C.,PF) 500 MG/ML	Unknown	—	—	1	$0.45	—	—	PDAC
63323-0064-02	MAGNESIUM SULFATE (S.D.V.,P.C.) 500 MG/ML	Unknown	—	—	1	$0.45	—	—	PDAC
10106-2506-05	MAGNESIUM SULFATE ANHYDROUS (REAGENT)	Unknown	—	—	2	$0.89	—	—	PDAC
23535-0608-61	MAGNESIUM SULFATE	Unknown	—	—	2	$0.89	—	—	PDAC
00406-4200-12	MAGNESIUM SULFATE (U.S.P.)	Unknown	—	—	2	$0.89	—	—	PDAC
23535-0608-68	MAGNESIUM SULFATE	Unknown	—	—	2	$0.89	—	—	PDAC
00409-6730-13	MAGNESIUM SULFATE (LATEX-FREE) 80 MG/ML	Unknown	—	—	0.16	$0.07	—	—	PDAC
00409-6729-09	MAGNESIUM SULFATE (PLASTIC CONTAINER) 40 MG/ML	Unknown	—	—	0.08	$0.04	—	—	PDAC
00409-6729-03	MAGNESIUM SULFATE (24X500ML,LATEX-FREE) 40 MG/ML	Unknown	—	—	0.08	$0.04	—	—	PDAC
00409-2168-02	MAGNESIUM SULFATE (VIAL, FLIPTOP) 500 MG/ML	Unknown	—	—	1	$0.45	—	—	PDAC

NDC→HCPCS mappings come from the CMS ASP NDC-HCPCS crosswalk; additional DME MAC / DMEPOS mappings come from PDAC and are labeled separately. NADAC from CMS (weekly). “Status” reflects the product's marketing / obsolete flag in the NDC directory. Presence or absence here does not determine Medicare coverage. Linked NDCs open the full product page.

📊 Medicare utilization & spend CMS · PART B · 2026 (Q1)

Period

Total Part B spend

$38.6K

Claims

26,029

Beneficiaries

7,821

Spend / beneficiary

$4.94

Spend / claim

$1.48

Trend by period

Where J3475 ranks among Part B drugs · 2026 (Q1) · neighbors ±5

Total spending — #617 of 824

#612 HEPARIN SODIUM IN 0.... J1644 $41.9K #613 NEOX NEOX RT OR CLAR... Q4148 $41.6K #614 ADENOSINE J0153 $40.5K #615 ATROPINE SULFATE(J04... J0462 $39.4K #616 PHENTOLAMINE MESYLAT... J2760 $39.3K #617 MAGNESIUM SULFATE-D5... J3475 $38.6K #618 FAMOTIDINE J1308 $37.8K #619 ZINPLAVA J0565 $36.7K #620 ESANO ACA, PER SQ CM... Q4275 $36.1K #621 DERMACYTE AMN MEM AL... Q4248 $35.9K #622 ONDANSETRON HCL(J240... J2405 $35.4K

Total claims — #87 of 824

#82 INJECTAFER J1439 29,106 #83 ENTYVIO J3380 28,749 #84 ADMELOG SOLOSTAR* J1817 28,262 #85 GENVISC 850 J7320 27,330 #86 FLUBLOK * 90673 26,354 #87 MAGNESIUM SULFATE-D5... J3475 26,029 #88 IMFINZI J9173 25,264 #89 KISUNLA J0175 25,188 #90 NPLATE J2802 24,900 #91 SYNVISC-ONE* J7325 24,623 #92 BUPIVACAINE HCL* J0665 24,071

Full breakdown by period (2)

Period	Total spend	Beneficiaries	Claims	$/beneficiary	$/claim
2026 (Q1)	$38.6K	7,821	26,029	$4.94	$1.48
2025 (Q1-Q4)	$203.7K	19,451	112,184	$10.47	$1.82

Provider-administered (Part B) spend, calculated for the whole HCPCS code (CMS does not publish Medicare spend per individual NDC). Self-administered use is covered under Part D instead. A blank patient count means fewer than 11 people — CMS hides counts that small to protect privacy. Source: CMS Medicare Quarterly Part B Spending by Drug (data.cms.gov), updated quarterly.

📈 Medicare Part B claims detail CMS PSPS · 2024

Calendar-year 2024 Medicare Part B fee-for-service activity for this HCPCS code, summed across all carriers, localities and specialties (CMS Physician/Supplier Procedure Summary). A “service” is one billed line/unit — not one claim — so counts run higher than claim counts.

Allowed charges

$202.8K

Medicare paid

$155K

Submitted services

518,639

Denial rate

20.0%

Allowed / service

$0.49

Submitted charges

$3.83M

Source: CMS Physician/Supplier Procedure Summary (PSPS), CY2024 — Medicare Part B carrier + DME fee-for-service claims (excludes Medicare Advantage). Figures are for the whole HCPCS code, which may cover uses beyond this drug. ⚠ CMS hides any figure covering fewer than 11 patients (a privacy rule), so totals — especially denials and low-volume codes — run a little low.

🗺️ Where J3475 is utilized CMS · BY PROVIDER · 2024

Medicare Part B services for this code by the rendering provider's state — 249,651 services across 41 states & territories in 2024 (CMS reports include DC and U.S. territories). Switch to per 100k to compare states fairly regardless of population. Hover or tap a state for its top ZIP codes.

Hover or tap a state to see its numbers + top ZIP codes.

Per-capita = services ÷ 2023 state population × 100,000 (so high-population states aren't automatically "hotter"). Counts reflect the provider's location, not the patient's. Providers with fewer than 11 patients are hidden by CMS for privacy, so totals run low and per-100k can be noisy in small states — read this as relative geography, not exact counts. Source: CMS Medicare Physician & Other Practitioners — by Provider and Service, 2024.

📊 What bills under J3475

J-codes are billing codes often used for drugs billed under the medical benefit. This connects the billing code to the NDC package records it covers, by ingredient and labeler.

NDC products by ingredient

Magnesium Sulfate Heptahydrate 9

Magnesium Sulfate 7

MAGNESIUM SULFATE IN WATER 6

MAGNESIUM SULFATE HEPTAHYDRATE 6

magnesium sulfate heptahydrate 5

magnesium sulfate in dextrose 2

Magnesium Sulfate in Dextrose 2

Magnesium Sulfate In Water For 2

NDC products by labeler

Hospira, Inc. 10

Fresenius Kabi USA, LLC 9

WG Critical Care, LLC 7

Baxter Healthcare Corporation 5

B. Braun Medical Inc. 4

Amneal Pharmaceuticals LLC 2

Civica, Inc. 2

Avenacy, LLC 2

🗃️ Data sources & freshness

Every figure on this page is computed from public datasets. Here's what each section draws on and how current it is.

HCPCS code & descriptor

CMS HCPCS Level II code file

Loaded

Payment limit & billing unit

CMS Medicare Part B ASP Pricing File (quarterly)

Q3 2026 · as of 2026-08-20

NDC ↔ HCPCS crosswalk

CMS ASP NDC-HCPCS crosswalk + DMEPDAC (PDAC)

82 NDCs mapped

NADAC acquisition cost

CMS National Average Drug Acquisition Cost (weekly)

Not available for mapped NDCs

Utilization & spend

CMS Part B Spending by Drug · PSPS · Physician & Other Practitioners

Latest data year 2026

Figures are estimates for reference and may lag the source files. Always verify against the current CMS files and your payer's policy before submitting claims.

⚠️ Practical billing caveats

A crosswalk is not coverage. An NDC mapping or a published payment limit does not guarantee a payer will cover or pay this code. Check the specific plan's policy.
Units ≠ milligrams. Bill the number of HCPCS units (dose ÷ the code's unit size), not the milligram dose. Use the calculator above.
Discarded drug. For single-dose vials, drug discarded after administration may be separately billable with modifier JW (and JZ when nothing is discarded) where the payer allows.
Rounding & partial units. Many payers require whole units; round per the payer's policy, not automatically up.
The code can cover more than this drug. Some HCPCS codes span multiple products or strengths — confirm the exact code for the product administered.
Figures lag. ASP limits change quarterly and utilization data are released with a delay. Verify against the current CMS files before billing.

❓ J3475 billing FAQ

What is HCPCS code J3475?

J3475 is a HCPCS Level II J-code used to bill Injection, magnesium sulfate, per 500 mg under Medicare Part B and most medical (not pharmacy) benefits.

What is the billing unit for J3475?

One unit of J3475 represents 500 MG. Report the number of units equal to the dose administered divided by 500 MG.

How many units of J3475 should I bill?

Divide the dose administered by the code's unit size (500 MG) to get the number of billing units, then round per your payer's policy. The calculator on this page converts a dose into billing units and projects a full course.

How much does Medicare pay for J3475?

The Medicare Part B payment limit is $0.446 per unit (Q3 2026), based on ASP + 6%. After the 2% sequester the effective payment is about $0.437 per unit. Payment limits are revised quarterly.

Which NDCs bill under J3475?

82 NDCs currently map to J3475 in the CMS ASP NDC-HCPCS crosswalk. See the NDC crosswalk table above for each product, package, billing units and estimated reimbursement.

Does a crosswalk mean J3475 is covered?

No. An NDC-to-HCPCS crosswalk and a published payment limit do not guarantee coverage or payment. Coverage depends on the payer, the diagnosis and the site of care — always verify the current policy before billing.

For professional billing reference only — verify against the current CMS files before submitting claims.