In short

Wezlana is billed under HCPCS Q5138 — Injection, ustekinumab-auub (wezlana), biosimilar, intravenous, 1 mg. One billing unit is 1 mg. CMS's crosswalk lists 1 Wezlana NDC under this code.

Q5138 code details

Reference

Q5138
Injection, ustekinumab-auub (wezlana), biosimilar, intravenous, 1 mgBilling unit: 1 mg
Labelers
Optum Health Solutions Ireland Limited

Medicare Part B payment limit

CMS ASP file
Payment limit per unit$2.273
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: 8% of reference add-on applied. A payment limit is not a coverage decision; the Medicare contractor decides coverage. CMS ASP pricing files

Wezlana units and claim line

Enter the dose given to get the Q5138 units and the NDC line for the CMS-1500 and the 837P.

Enter the dose given to build the claim line.

Wezlana 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.

Wezlana NDCs in the CMS ASP crosswalk
NDC (11-digit)HCPCSLabelerPackageBilling units per package
84612-0066-01Q5138Optum Health Solutions Ireland Limited26130

Wezlana: common questions

What is the HCPCS code for Wezlana?
Wezlana is billed under HCPCS Q5138 — Injection, ustekinumab-auub (wezlana), biosimilar, intravenous, 1 mg. One billing unit is 1 mg. CMS's crosswalk lists 1 Wezlana NDC under this code.
How many Q5138 billing units are in a package of Wezlana?
CMS lists 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 Q5138 a CPT code?
No. Q5138 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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