J1120 HCPCS code: Injection, acetazolamide sodium, up to 500 mg
J1120 is the HCPCS Level II code for injection, acetazolamide sodium, up to 500 mg. In 2024 Medicare paid an average of $19.43 per service for J1120 across 29 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 2 per day on outpatient hospital claims. Medicare volume rose 71% from 2022 to 2024 (17 to 29 services). In 2024, about 5 clinicians billed Medicare for J1120 for 14 beneficiaries.
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 | 1982-01-01 |
| Last action effective | 1997-01-01 |
Who bills J1120 (2024)
| Measure | Value |
|---|---|
| Clinicians billing (by place of service) | 5 |
| Medicare beneficiaries | 14 |
| States with claims | 0 |
Counts only. Supplier and clinician names, contact lists and state-by-state detail are in Caduvo.
Medicare utilization for J1120, 2022–2024
| Year | Services | Beneficiaries | Avg. allowed | Avg. paid |
|---|---|---|---|---|
| 2022 | 17 | 11 | $19.67 | $14.55 |
| 2023 | 43 | 25 | $19.66 | $14.55 |
| 2024 | 29 | 14 | $24.38 | $19.43 |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| outpatient hospital claims | 2 | Prescribing Information |
| practitioner claims | 2 | Prescribing Information |
What changed for J1120
- 1982-01-01: J1120 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 J1120?
J1120 is the HCPCS Level II code for injection, acetazolamide sodium, up to 500 mg. Short descriptor: "Acetazolamid sodium injectio".
How much does Medicare pay for J1120?
In 2024, the average Medicare payment was $19.43 per service (average allowed $24.38).
Does Medicare cover J1120?
Coverage code D — Special coverage instructions apply. Medicare covers it when its national or local coverage criteria are met.
How many units of J1120 can be billed per day?
2 on outpatient hospital claims; 2 on practitioner claims (NCCI medically unlikely edits).
Related J11 codes
- J1100 — Injection, dexamethasone sodium phosphate, 1 mg
- J1105 — Dexmedetomidine, oral, 1 mcg
- J1110 — Injection, dihydroergotamine mesylate, per 1 mg
- J1130 — Injection, diclofenac sodium, 0.5 mg
- J1160 — Injection, digoxin, up to 0.5 mg
- J1162 — Injection, digoxin immune fab (ovine), per vial
- J1163 — Injection, diltiazem hydrochloride, 0.5 mg
- J1164 — Injection, diltiazem hydrochloride in 0.72% sodium chloride, 0.5 mg
- J1165 — Injection, phenytoin sodium, per 50 mg
- J1170 — Injection, hydromorphone, up to 4 mg
- J1171 — Injection, hydromorphone, 0.1 mg
- J1180 — Injection, dyphylline, up to 500 mg
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Next steps
- Run a reimbursement report for a device billed under J1120
- Watch J1120 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for J1120
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.