J3475 HCPCS code: Injection, magnesium sulfate, per 500 mg
J3475 is the HCPCS Level II code for injection, magnesium sulfate, per 500 mg. In 2024 Medicare paid an average of $0.44 per service for J3475 across 447,924 services. Its Medicare coverage code is D (Special coverage instructions apply): Medicare covers it when its national or local coverage criteria are met. The NCCI unit limit is 80 per day on outpatient hospital claims. Medicare volume fell 4% from 2022 to 2024 (467,503 to 447,924 services). In 2024, about 5,341 clinicians billed Medicare for J3475 for 19,992 beneficiaries; California, Texas, Florida accounted for 36% of services.
Code details
| Field | Value |
|---|---|
| Section | J codes — Drugs administered other than oral method |
| Coverage code | D — Special coverage instructions apply |
| Pricing indicator | 51 — Drug or biological (priced per ASP/average sales price rules) |
| BETOS category | O1E — Other drugs |
| Added | 1996-01-01 |
| Last action effective | 1997-01-01 |
Who bills J3475 (2024)
| Measure | Value |
|---|---|
| Clinicians billing (by place of service) | 5,341 |
| Medicare beneficiaries | 19,992 |
| States with claims | 49 |
| Share of services in top 3 states (California, Texas, Florida) | 36% |
Counts only. Supplier and clinician names, contact lists and state-by-state detail are in Caduvo.
Medicare utilization for J3475, 2022–2024
| Year | Services | Beneficiaries | Avg. allowed | Avg. paid |
|---|---|---|---|---|
| 2022 | 467,503 | 20,742 | $0.70 | $0.56 |
| 2023 | 457,351 | 21,147 | $0.76 | $0.60 |
| 2024 | 447,924 | 19,992 | $0.56 | $0.44 |
States with the most J3475 services (2024)
| State | Services | Avg. paid |
|---|---|---|
| California | 58,948 | $0.44 |
| Texas | 53,850 | $0.44 |
| Florida | 49,858 | $0.45 |
| Illinois | 37,215 | $0.44 |
| New York | 31,266 | $0.44 |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| outpatient hospital claims | 80 | Clinical: Data |
| practitioner claims | 20 | Clinical: Data |
What changed for J3475
- 1996-01-01: J3475 added to HCPCS Level II
- Next scheduled CMS quarterly update (HCPCS and DMEPOS fee schedule): 2027-01-01
Frequently asked questions
What is HCPCS code J3475?
J3475 is the HCPCS Level II code for injection, magnesium sulfate, per 500 mg. Short descriptor: "Inj magnesium sulfate".
How much does Medicare pay for J3475?
In 2024, the average Medicare payment was $0.44 per service (average allowed $0.56).
Does Medicare cover J3475?
Coverage code D — Special coverage instructions apply. Medicare covers it when its national or local coverage criteria are met.
How many units of J3475 can be billed per day?
80 on outpatient hospital claims; 20 on practitioner claims (NCCI medically unlikely edits).
Related J34 codes
- J3400 — Injection, triflupromazine hcl, up to 20 mg
- J3401 — Beremagene geperpavec-svdt for topical administration, containing nominal 5 x 10^9 pfu/ml vector genomes, per 0.1 ml
- J3402 — Injection, remestemcel-l-rknd, per therapeutic dose
- J3403 — Revakinagene taroretcel-lwey, per implant
- J3404 — Injection, zopapogene imadenovec-drba suspension, per therapeutic dose
- J3405 — Injection, onasemnogene abeparvovec-brve, per treatment
- J3406 — Injection, omidubicel-onlv, per therapeutic dose
- J3410 — Injection, hydroxyzine hcl, up to 25 mg
- J3411 — Injection, thiamine hcl, 100 mg
- J3415 — Injection, pyridoxine hcl, 100 mg
- J3420 — Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg
- J3424 — Injection, hydroxocobalamin, intravenous, 25 mg
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Next steps
- Run a reimbursement report for a device billed under J3475
- Watch J3475 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for J3475
Sources: CMS HCPCS Level II release October 2026; CMS DMEPOS fee schedule; CMS NCCI MUE tables; CMS Medicare utilization (physician and DME supplier files); CMS Medicare Coverage Database articles. Fees are Medicare allowables, not commercial rates. Not billing or legal advice.