How many J1628 billing units are in a package of Tremfya?

CMS lists 100 to 400 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.

No. J1628 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.

Tremfya J-Code J1628 — Billing Units & NDCs

In short

Tremfya is billed under HCPCS J1628 — Injection, guselkumab, 1 mg. One billing unit is 1 mg. CMS's crosswalk lists 7 Tremfya NDCs under this code.

J1628 code details

Reference

J1628: Injection, guselkumab, 1 mgBilling unit: 1 mg
Labelers: Janssen Biotech, Inc.

Medicare Part B payment limit

CMS ASP file

Payment limit per unit$66.998

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. A payment limit is not a coverage decision; the Medicare contractor decides coverage. CMS ASP pricing files

Tremfya units and claim line

Enter the dose given to get the J1628 units and the NDC line for the CMS-1500 and the 837P.

Dose given (mg)

HCPCS units (1 unit = 1 mg)

Modifier

NDC (11-digit)

NDC unit qualifier

NDC quantity

Enter the dose given to build the claim line.

Tremfya 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.

Tremfya NDCs in the CMS ASP crosswalk
NDC (11-digit)	HCPCS	Labeler	Package	Billing units per package
57894-0640-01	J1628	Janssen Biotech, Inc.	1	100
57894-0640-06	J1628	Janssen Biotech, Inc.	1	100
57894-0640-11	J1628	Janssen Biotech, Inc.	1	100
57894-0650-02	J1628	Janssen Biotech, Inc.	20	200
57894-0651-02	J1628	Janssen Biotech, Inc.	2	200
57894-0651-04	J1628	Janssen Biotech, Inc.	2 × 2	400
57894-0651-22	J1628	Janssen Biotech, Inc.	2	200

Tremfya: common questions

What is the J-code for Tremfya?: Tremfya is billed under HCPCS J1628 — Injection, guselkumab, 1 mg. One billing unit is 1 mg. CMS's crosswalk lists 7 Tremfya NDCs under this code.
How many J1628 billing units are in a package of Tremfya?: CMS lists 100 to 400 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 J1628 a CPT code?: No. J1628 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.

Tremfya J-Code / HCPCS Code