In short

Otulfi is billed under HCPCS Q9999 — Injection, ustekinumab-aauz (otulfi), biosimilar, 1 mg. One billing unit is 1 mg. CMS's crosswalk lists 4 Otulfi NDCs under this code.

Q9999 code details

Reference

Q9999
Injection, ustekinumab-aauz (otulfi), biosimilar, 1 mgBilling unit: 1 mg
Labelers
FreseniUS Kabi USA, LLC

Medicare Part B payment limit

CMS ASP file
Payment limit per unit$13.246
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. A payment limit is not a coverage decision; the Medicare contractor decides coverage. CMS ASP pricing files

Otulfi units and claim line

Enter the dose given to get the Q9999 units and the NDC line for the CMS-1500 and the 837P.

Enter the dose given to build the claim line.

Otulfi 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.

Otulfi NDCs in the CMS ASP crosswalk
NDC (11-digit)HCPCSLabelerPackageBilling units per package
65219-0822-05Q9999FreseniUS Kabi USA, LLC0.545
65219-0824-01Q9999FreseniUS Kabi USA, LLC0.545
65219-0826-26Q9999FreseniUS Kabi USA, LLC190
65219-0828-05Q9999FreseniUS Kabi USA, LLC26130

Otulfi: common questions

What is the HCPCS code for Otulfi?
Otulfi is billed under HCPCS Q9999 — Injection, ustekinumab-aauz (otulfi), biosimilar, 1 mg. One billing unit is 1 mg. CMS's crosswalk lists 4 Otulfi NDCs under this code.
How many Q9999 billing units are in a package of Otulfi?
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 Q9999 a CPT code?
No. Q9999 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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