No. J9311 is a HCPCS Level II code, maintained by CMS, that identifies the drug supplied. CPT codes are five-digit numbers from the AMA that describe services. Giving the drug, for example an injection or infusion, is usually reported with a separate CPT administration code.

What NDCs are billed under J9311?

CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 2 NDCs under J9311, for Rituxan Hycela. The table on this page shows each one with its billing units per package.

What is the Medicare payment limit for J9311?

$36.265 per 10 mg, effective October 1, 2026 through December 31, 2026, from CMS's Part B drug payment limit file. Multiply by the units billed for the allowed amount before deductible and coinsurance. It is not a coverage decision.

J9311 J-Code: Rituxan Hycela

In short

J9311 is the HCPCS Level II code for injection, rituximab 10 mg and hyaluronidase. CMS assigns NDCs for Rituxan Hycela to it. The Medicare Part B payment limit is $36.265 per unit (October 1, 2026 through December 31, 2026).

Code

CMS HCPCS file

HCPCS codeJ9311

Billing unitSee descriptor

Descriptor: Injection, rituximab 10 mg and hyaluronidase
Short descriptor: Inj rituximab, hyaluronidase
Code set: HCPCS Level II, maintained by CMS
Effective: Jan 1, 2019

Medicare Part B payment limit

CMS ASP file

Payment limit per unit$36.265

Per10 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

Units and claim line

Enter the dose to get the 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.

NDCs billed under J9311

CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 2 NDCs to J9311 for Rituxan Hycela. Billing units per package are CMS’s figures for this code’s unit.

NDCs assigned to J9311 in the CMS ASP crosswalk
Drug	NDC (11-digit)	Labeler	Package	Billing units per package
Rituxan Hycela	50242-0108-01	Genentech, Inc.	11.7	140
Rituxan Hycela	50242-0109-01	Genentech, Inc.	13.4	160

J9311: common questions

Is J9311 a CPT code?: No. J9311 is a HCPCS Level II code, maintained by CMS, that identifies the drug supplied. CPT codes are five-digit numbers from the AMA that describe services. Giving the drug, for example an injection or infusion, is usually reported with a separate CPT administration code. CPT codes for drug administration.
What NDCs are billed under J9311?: CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 2 NDCs under J9311, for Rituxan Hycela. The table on this page shows each one with its billing units per package.
What is the Medicare payment limit for J9311?: $36.265 per 10 mg, effective October 1, 2026 through December 31, 2026, from CMS's Part B drug payment limit file. Multiply by the units billed for the allowed amount before deductible and coinsurance. It is not a coverage decision.

J9311 — Injection, rituximab 10 mg and hyaluronidase