J2311 – Injection, naloxone hydrochloride (zimhi), 1 mg
HCPCS Level II code · J codes: Drugs Administered Other Than Oral Method
HCPCS codeJ2311
- Long description
- Injection, naloxone hydrochloride (zimhi), 1 mg
- Short description
- Inj, naloxone hcl (zimhi)
- Pricing indicator
51Drugs- Medicare coverage
DSpecial coverage instructions apply- BETOS category
O1EOther drugs- Added
- January 1, 2023
- Last change
- July 1, 2025 – No change
- Termination date
- June 30, 2025
Frequently asked questions
What is HCPCS code J2311?
J2311 is a HCPCS Level II code for injection, naloxone hydrochloride (zimhi), 1 mg. It was discontinued on June 30, 2025.
Does Medicare cover J2311?
The HCPCS file lists coverage code D: Special coverage instructions apply. Coverage and payment also depend on local coverage determinations and the patient’s plan.
Nearby J codes
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- J2290 – Injection, nafcillin sodium, 20 mg
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- 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
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- J2323 – Injection, natalizumab, 1 mg
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Source: CMS HCPCS Level II quarterly file, October 2026. Reference only – check payer policy before billing.