No. J1945 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.

What is one billing unit of J1945?

One unit of J1945 is 50 mg, as stated in the code's descriptor. Units to report = dose given ÷ 50 mg.

J1945 J-Code (Retired 2025) — Injection, lepirudin, 50 mg

J1945 was retired on Dec 31, 2025

CMS ended J1945 after Dec 31, 2025. Don’t report it for later dates of service. Look up the drug for its current code.

Look up lepirudin

Code

CMS HCPCS file

HCPCS codeJ1945

Billing unit50 mg

Descriptor: Injection, lepirudin, 50 mg
Short descriptor: Lepirudin
Code set: HCPCS Level II, maintained by CMS
Effective: Jan 1, 2026

The billing unit is read from the descriptor. Confirm it against the CMS file before billing.

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Med-Code hasn’t mapped J1945 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.

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J1945: common questions

Is J1945 a CPT code?: No. J1945 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 J1945?: One unit of J1945 is 50 mg, as stated in the code's descriptor. Units to report = dose given ÷ 50 mg. J-code billing units.

J1945 — Injection, lepirudin, 50 mg

Code

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J1945: common questions

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