How many Q2042 billing units are in a package of Kymriah?

CMS lists 1 billing units per package, depending on the NDC, where one unit is up to 600 million car-positive viable t cells. Units to report are based on the dose given, not the package.

No. Q2042 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.

Kymriah HCPCS Code Q2042 — Billing Units & NDCs

In short

Kymriah is billed under HCPCS Q2042. One billing unit is up to 600 million car-positive viable t cells. CMS's crosswalk lists 2 Kymriah NDCs under this code.

Q2042 code details

Reference

Q2042: HCPCS Level II drug codeBilling unit: up to 600 million car-positive viable t cells
Labelers: Novartis Pharmaceuticals Corporation

Medicare Part B payment limit

CMS ASP file

Payment limit per unit$626,315.834

Perup to 600 million car-positive viable t cells

Coinsurance17.294%

Effective October 1, 2026 through December 31, 2026. Payment allowance limits subject to the ASP methodology are based on 2Q26 ASP data. CMS note: Inflation-adjusted coinsurance. A payment limit is not a coverage decision; the Medicare contractor decides coverage. CMS ASP pricing files

Kymriah units and claim line

Enter the dose given to get the Q2042 units and the NDC line for the CMS-1500 and the 837P.

HCPCS units

Modifier

NDC (11-digit)

NDC unit qualifier

NDC quantity

Enter the units to build the claim line.

Kymriah 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.

Kymriah NDCs in the CMS ASP crosswalk
NDC (11-digit)	HCPCS	Labeler	Package	Billing units per package
00078-0846-19	Q2042	Novartis Pharmaceuticals Corporation	1	1
00078-0958-19	Q2042	Novartis Pharmaceuticals Corporation	1	1

Kymriah: common questions

What is the HCPCS code for Kymriah?: Kymriah is billed under HCPCS Q2042. One billing unit is up to 600 million car-positive viable t cells. CMS's crosswalk lists 2 Kymriah NDCs under this code.
How many Q2042 billing units are in a package of Kymriah?: CMS lists 1 billing units per package, depending on the NDC, where one unit is up to 600 million car-positive viable t cells. Units to report are based on the dose given, not the package.
Is Q2042 a CPT code?: No. Q2042 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.

Kymriah HCPCS Code