J2311 HCPCS code: Injection, naloxone hydrochloride (zimhi), 1 mg
J2311 is the HCPCS Level II code for injection, naloxone hydrochloride (zimhi), 1 mg. CMS terminated J2311 on 2025-06-30; do not bill it for later dates of service. Its Medicare coverage code is D (Special coverage instructions apply): Medicare covers it when its national or local coverage criteria are met.
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 | 2023-01-01 |
| Last action effective | 2025-07-01 |
| Terminated | 2025-06-30 |
What changed for J2311
- 2023-01-01: J2311 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 J2311?
J2311 is the HCPCS Level II code for injection, naloxone hydrochloride (zimhi), 1 mg. Short descriptor: "Inj, naloxone hcl (zimhi)".
Does Medicare cover J2311?
Coverage code D — Special coverage instructions apply. Medicare covers it when its national or local coverage criteria are met.
Related J23 codes
- J2300 — Injection, nalbuphine hydrochloride, per 10 mg
- J2305 — Injection, nitroglycerin, 5 mg
- J2310 — Injection, naloxone hydrochloride, per 1 mg
- J2312 — Injection, naloxone hydrochloride, not otherwise specified, 0.01 mg
- J2313 — Injection, naloxone hydrochloride (zimhi), 0.01 mg
- J2315 — Injection, naltrexone, depot form, 1 mg
- J2320 — Injection, nandrolone decanoate, up to 50 mg
- J2323 — Injection, natalizumab, 1 mg
- J2325 — Injection, nesiritide, 0.1 mg
- J2326 — Injection, nusinersen, 0.1 mg
- J2327 — Injection, risankizumab-rzaa, intravenous, 1 mg
- J2329 — Injection, ublituximab-xiiy, 1mg
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Next steps
- Run a reimbursement report for a device billed under J2311
- Watch J2311 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for J2311
Sources: CMS HCPCS Level II release October 2025; 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.