J0594 HCPCS code: injection, busulfan, 1 mg
J0594 is the HCPCS Level II code for injection, busulfan, 1 mg. Its Medicare coverage code is C (Carrier judgment): Coverage is decided by the Medicare contractor (MAC) case by case. The NCCI unit limit is 320 per day on outpatient hospital claims.
Code details
| Field | Value |
|---|---|
| Section | J codes — Drugs administered other than oral method |
| Coverage code | C — Carrier judgment |
| Pricing indicator | 51 — Drug or biological (priced per ASP/average sales price rules) |
| BETOS category | O1E — Other drugs |
| Added | 2007-01-01 |
| Last action effective | 2007-01-01 |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| outpatient hospital claims | 320 | Prescribing Information |
| practitioner claims | 320 | Prescribing Information |
What changed for J0594
- 2007-01-01: J0594 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 J0594?
J0594 is the HCPCS Level II code for injection, busulfan, 1 mg. Short descriptor: "Busulfan injection".
Does Medicare cover J0594?
Coverage code C — Carrier judgment. Coverage is decided by the Medicare contractor (MAC) case by case.
How many units of J0594 can be billed per day?
320 on outpatient hospital claims; 320 on practitioner claims (NCCI medically unlikely edits).
Related J05 codes
- J0500 — Injection, dicyclomine hcl, up to 20 mg
- J0515 — Injection, benztropine mesylate, per 1 mg
- J0517 — Injection, benralizumab, 1 mg
- J0520 — Injection, bethanechol chloride, myotonachol or urecholine, up to 5 mg
- J0525 — Injection, cefotetan disodium, 10 mg
- J0528 — Injection, fosfomycin disodium, 20 mg
- J0558 — Injection, penicillin g benzathine and penicillin g procaine, 100,000 units
- J0561 — Injection, penicillin g benzathine, 100,000 units
- J0565 — Injection, bezlotoxumab, 10 mg
- J0567 — Injection, cerliponase alfa, 1 mg
- J0570 — Buprenorphine implant, 74.2 mg
- J0571 — Buprenorphine, oral, 1 mg
Building a device that would bill under a code like this? Caduvo matches a device description to HCPCS/CPT codes, Medicare coverage and payment, and the FDA pathway in one report.
Next steps
- Run a reimbursement report for a device billed under J0594
- Watch J0594 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for J0594
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.