How many J9261 billing units are in a package of Nelarabine?

CMS lists 5 to 30 billing units per package, depending on the NDC, where one unit is 50 mg. Units to report are based on the dose given, not the package.

No. J9261 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.

Nelarabine J-Code J9261 — Billing Units & NDCs

In short

Nelarabine is billed under HCPCS J9261 — Injection, nelarabine, 50 mg. One billing unit is 50 mg. CMS's crosswalk lists 18 Nelarabine NDCs under this code.

J9261 code details

Reference

J9261: Injection, nelarabine, 50 mgBilling unit: 50 mg
Labelers: Alembic Pharmaceuticals Inc.; Amneal Pharmaceuticals, LLC; Dr. Reddy's Laboratories Inc.; Meitheal Pharmaceuticals Inc.; Novadoz Pharmaceuticals LLC; Sagent Pharmaceuticals; Shorla Oncology Inc.; XGen Pharmaceuticals DJB, Inc.and 1 more

Medicare Part B payment limit

CMS ASP file

Payment limit per unit$40.872

Per50 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

Nelarabine units and claim line

Enter the dose given to get the J9261 units and the NDC line for the CMS-1500 and the 837P.

Dose given (mg)

HCPCS units (1 unit = 50 mg)

Modifier

NDC (11-digit)

NDC unit qualifier

NDC quantity

Enter the dose given to build the claim line.

Nelarabine 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.

Nelarabine NDCs in the CMS ASP crosswalk
NDC (11-digit)	HCPCS	Labeler	Package	Billing units per package
25021-0259-50	J9261	Sagent Pharmaceuticals	50	5
25021-0259-51	J9261	Sagent Pharmaceuticals	6 × 50	30
39822-0650-01	J9261	XGen Pharmaceuticals DJB, Inc.	50	5
39822-0650-06	J9261	XGen Pharmaceuticals DJB, Inc.	6 × 50	30
43598-0142-06	J9261	Dr. Reddy's Laboratories Inc.	6 × 50	30
43598-0142-11	J9261	Dr. Reddy's Laboratories Inc.	50	5
62332-0813-50	J9261	Alembic Pharmaceuticals Inc.	50	5
70121-1743-04	J9261	Amneal Pharmaceuticals, LLC	6 × 50	30
70710-1726-01	J9261	Zydus Pharmaceuticals (USA) Inc.	50	5
70710-1726-08	J9261	Zydus Pharmaceuticals (USA) Inc.	6 × 50	30
70710-1839-01	J9261	Zydus Pharmaceuticals (USA) Inc.	50	5
70710-1839-08	J9261	Zydus Pharmaceuticals (USA) Inc.	6 × 50	30
71288-0165-53	J9261	Meitheal Pharmaceuticals Inc.	6 × 50	30
71288-0165-54	J9261	Meitheal Pharmaceuticals Inc.	50	5
72205-0154-01	J9261	Novadoz Pharmaceuticals LLC	50	5
72205-0154-04	J9261	Novadoz Pharmaceuticals LLC	6 × 50	30
81927-0111-01	J9261	Shorla Oncology Inc.	50	5
81927-0111-06	J9261	Shorla Oncology Inc.	6 × 50	30

Nelarabine: common questions

What is the J-code for Nelarabine?: Nelarabine is billed under HCPCS J9261 — Injection, nelarabine, 50 mg. One billing unit is 50 mg. CMS's crosswalk lists 18 Nelarabine NDCs under this code.
How many J9261 billing units are in a package of Nelarabine?: CMS lists 5 to 30 billing units per package, depending on the NDC, where one unit is 50 mg. Units to report are based on the dose given, not the package.
Is J9261 a CPT code?: No. J9261 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.

Nelarabine J-Code / HCPCS Code