HCPCS Level II drug code
J2313 — Injection, naloxone hydrochloride (zimhi), 0.01 mg
In short
J2313 is the HCPCS Level II code for injection, naloxone hydrochloride (zimhi), 0.01 mg. One billing unit is 0.01 mg.
Code
CMS HCPCS fileHCPCS codeJ2313
Billing unit0.01 mg
- Descriptor
- Injection, naloxone hydrochloride (zimhi), 0.01 mg
- Short descriptor
- Inj, naloxone (zimhi) 0.01mg
- Code set
- HCPCS Level II, maintained by CMS
- Effective
- Jul 1, 2025
The billing unit is read from the descriptor. Confirm it against the CMS file before billing.
Units and claim line
Units = dose given ÷ 0.01 mg. For example, 1 mg is 100 units. Enter the dose to get the units and the NDC line for the CMS-1500 and the 837P.
Enter the dose given to build the claim line.
Find the NDC
Med-Code hasn’t mapped J2313 to specific products yet. Search the FDA NDC Directory for the drug named in the descriptor, and check the route and strength match the code.
J2313: common questions
- Is J2313 a CPT code?
- No. J2313 is a HCPCS Level II code, maintained by CMS, that identifies the drug supplied. CPT codes are five-digit numbers from the AMA that describe services. Giving the drug, for example an injection or infusion, is usually reported with a separate CPT administration code. CPT codes for drug administration.
- What is one billing unit of J2313?
- One unit of J2313 is 0.01 mg, as stated in the code's descriptor. Units to report = dose given ÷ 0.01 mg. J-code billing units.