In short

Steqeyma is billed under HCPCS Q5099 — Injection, ustekinumab-stba (steqeyma), biosimilar, 1 mg. One billing unit is 1 mg. CMS's crosswalk lists 4 Steqeyma NDCs under this code.

Q5099 code details

Reference

Q5099
Injection, ustekinumab-stba (steqeyma), biosimilar, 1 mgBilling unit: 1 mg
Labelers
Celltrion USA, INC.; Celltrion USA, Inc.

Medicare Part B payment limit

CMS ASP file
Payment limit per unit$2.89
Per1 mg
Coinsurance20%

Effective October 1, 2026 through December 31, 2026. Payment allowance limits subject to the ASP methodology are based on 2Q26 ASP data. CMS note: "lesser of" methodology applied; 8% of reference add-on applied. A payment limit is not a coverage decision; the Medicare contractor decides coverage. CMS ASP pricing files

Steqeyma units and claim line

Enter the dose given to get the Q5099 units and the NDC line for the CMS-1500 and the 837P.

Enter the dose given to build the claim line.

Steqeyma NDCs and billing units

From CMS’s ASP NDC–HCPCS crosswalk, effective October 1, 2026 through December 31, 2026. Billing units per package are CMS’s figures for the code’s unit.

Steqeyma NDCs in the CMS ASP crosswalk
NDC (11-digit)HCPCSLabelerPackageBilling units per package
72606-0027-01Q5099Celltrion USA, Inc.0.545
72606-0028-01Q5099Celltrion USA, Inc.190
72606-0029-01Q5099Celltrion USA, Inc.26130
72606-0060-01Q5099Celltrion USA, INC.0.545

Steqeyma: common questions

What is the HCPCS code for Steqeyma?
Steqeyma is billed under HCPCS Q5099 — Injection, ustekinumab-stba (steqeyma), biosimilar, 1 mg. One billing unit is 1 mg. CMS's crosswalk lists 4 Steqeyma NDCs under this code.
How many Q5099 billing units are in a package of Steqeyma?
CMS lists 45 to 130 billing units per package, depending on the NDC, where one unit is 1 mg. Units to report are based on the dose given, not the package.
Is Q5099 a CPT code?
No. Q5099 is a HCPCS Level II code from CMS for the drug itself. Giving it, for example by injection or infusion, is usually reported with a separate CPT administration code.

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