No. J9179 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 J9179?

CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 11 NDCs under J9179, for Eribulin Mesylate and Halaven. The table on this page shows each one with its billing units per package.

What is the Medicare payment limit for J9179?

$63.972 per 0.1 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.

What is one billing unit of J9179?

One unit of J9179 is 0.1 mg, as stated in the code's descriptor. Units to report = dose given ÷ 0.1 mg.

J9179 J-Code: Halaven (eribulin mesylate) — Billing Units

In short

J9179 is the HCPCS Level II code for injection, eribulin mesylate, 0.1 mg. CMS assigns NDCs for Eribulin Mesylate and Halaven to it. One billing unit is 0.1 mg. The Medicare Part B payment limit is $63.972 per unit (October 1, 2026 through December 31, 2026).

Code

CMS HCPCS file

HCPCS codeJ9179

Billing unit0.1 mg

Descriptor: Injection, eribulin mesylate, 0.1 mg
Short descriptor: Eribulin mesylate injection
Code set: HCPCS Level II, maintained by CMS
Effective: Jan 1, 2012

The billing unit is read from the descriptor. Confirm it against the CMS file before billing.

Medicare Part B payment limit

CMS ASP file

Payment limit per unit$63.972

Per0.1 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

Units = dose given ÷ 0.1 mg. For example, 10 mg is 100 units. Enter the dose to get the units and the NDC line for the CMS-1500 and the 837P.

Dose given (mg)

HCPCS units (1 unit = 0.1 mg)

Modifier

NDC (11-digit)

NDC unit qualifier

NDC quantity

Enter the dose given to build the claim line.

NDCs billed under J9179

CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 11 NDCs to J9179 for Eribulin Mesylate and Halaven. Billing units per package are CMS’s figures for this code’s unit.

NDCs assigned to J9179 in the CMS ASP crosswalk
Drug	NDC (11-digit)	Labeler	Package	Billing units per package
Eribulin Mesylate	00143-9167-01	Hikma Pharmaceuticals USA Inc.	2	10
Eribulin Mesylate	00781-3391-94	Sandoz Inc.	2	10
Eribulin Mesylate	10019-0080-01	Baxter Healthcare Corporation	2	10
Eribulin Mesylate	39822-2080-01	XGen Pharmaceuticals DJB, Inc.	2	10
Eribulin Mesylate	43598-0125-11	Dr. Reddy's Laboratories Inc.	2	10
Eribulin Mesylate	60505-6289-00	Apotex Corp	2	10
Eribulin Mesylate	68001-0656-41	BluePoint Laboratories	2	10
Eribulin Mesylate	68462-0770-20	Glenmark Pharmaceuticals Inc., USA	2	10
Eribulin Mesylate	72603-0368-01	Northstar RxLLC	2	10
Eribulin Mesylate	81298-3890-01	Long Grove Pharmaceuticals, LLC	2	10
Halaven	62856-0389-01	Eisai Inc.	2	10

J9179: common questions

Is J9179 a CPT code?: No. J9179 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 J9179?: CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 11 NDCs under J9179, for Eribulin Mesylate and Halaven. The table on this page shows each one with its billing units per package.
What is the Medicare payment limit for J9179?: $63.972 per 0.1 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.
What is one billing unit of J9179?: One unit of J9179 is 0.1 mg, as stated in the code's descriptor. Units to report = dose given ÷ 0.1 mg. J-code billing units.

J9179 — Injection, eribulin mesylate, 0.1 mg