No. Q5109 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 Q5109?

One unit of Q5109 is 10 mg, as stated in the code's descriptor. Units to report = dose given ÷ 10 mg.

Q5109 (Retired 2025) — Injection, ixifi, 10 mg

Q5109 was retired on Dec 31, 2025

CMS ended Q5109 after Dec 31, 2025. Don’t report it for later dates of service. Current codes for the same drug:

Code

CMS HCPCS file

HCPCS codeQ5109

Billing unit10 mg

Descriptor: Injection, infliximab-qbtx, biosimilar, (ixifi), 10 mg
Short descriptor: Injection, ixifi, 10 mg
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.

Find the NDC

Med-Code hasn’t mapped Q5109 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.

Search NDCs for infliximab-qbtx

Q5109: common questions

Is Q5109 a CPT code?: No. Q5109 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 Q5109?: One unit of Q5109 is 10 mg, as stated in the code's descriptor. Units to report = dose given ÷ 10 mg. J-code billing units.

Q5109 — Injection, infliximab-qbtx, biosimilar, (ixifi), 10 mg

Code

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Q5109: common questions

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