No. J9266 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 J9266?

CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 1 NDC under J9266, for Oncaspar. The table on this page shows each one with its billing units per package.

What is the Medicare payment limit for J9266?

$29,845.265 per 1 ea, 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.

J9266 J-Code: Oncaspar (pegaspargase) — Billing Units

In short

J9266 is the HCPCS Level II code for injection, pegaspargase, per single dose vial. CMS assigns NDCs for Oncaspar to it. The Medicare Part B payment limit is $29,845.265 per unit (October 1, 2026 through December 31, 2026).

Code

CMS HCPCS file

HCPCS codeJ9266

Billing unitSee descriptor

Descriptor: Injection, pegaspargase, per single dose vial
Short descriptor: Pegaspargase injection
Code set: HCPCS Level II, maintained by CMS
Effective: Jan 1, 2009

Medicare Part B payment limit

CMS ASP file

Payment limit per unit$29,845.265

Per1 ea

Coinsurance18.38%

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

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 J9266

CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 1 NDC to J9266 for Oncaspar. Billing units per package are CMS’s figures for this code’s unit.

NDCs assigned to J9266 in the CMS ASP crosswalk
Drug	NDC (11-digit)	Labeler	Package	Billing units per package
Oncaspar	72694-0954-01	Servier Pharmaceuticals LLC	5	1

J9266: common questions

Is J9266 a CPT code?: No. J9266 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 J9266?: CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 1 NDC under J9266, for Oncaspar. The table on this page shows each one with its billing units per package.
What is the Medicare payment limit for J9266?: $29,845.265 per 1 ea, 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.

J9266 — Injection, pegaspargase, per single dose vial