No. J1580 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 J1580?

CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 21 NDCs under J1580, for Gentamicin Sulfate. The table on this page shows each one with its billing units per package.

What is the Medicare payment limit for J1580?

$1.849 per 80 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.

J1580 J-Code: Gentamicin Sulfate (garamycin)

In short

J1580 is the HCPCS Level II code for injection, garamycin, gentamicin, up to 80 mg. CMS assigns NDCs for Gentamicin Sulfate to it. The Medicare Part B payment limit is $1.849 per unit (October 1, 2026 through December 31, 2026).

Code

CMS HCPCS file

HCPCS codeJ1580

Billing unitSee descriptor

Descriptor: Injection, garamycin, gentamicin, up to 80 mg
Short descriptor: Garamycin gentamicin inj
Code set: HCPCS Level II, maintained by CMS
Effective: Jan 1, 1997

Medicare Part B payment limit

CMS ASP file

Payment limit per unit$1.849

Per80 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 J1580

CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 21 NDCs to J1580 for Gentamicin Sulfate. Billing units per package are CMS’s figures for this code’s unit.

NDCs assigned to J1580 in the CMS ASP crosswalk
Drug	NDC (11-digit)	Labeler	Package	Billing units per package
Gentamicin Sulfate	00143-9128-25	Hikma Pharmaceuticals USA Inc.	25 × 2	25
Gentamicin Sulfate	00338-0503-48	Baxter Healthcare Corporation	100	1
Gentamicin Sulfate	00338-0505-48	Baxter Healthcare Corporation	100	2
Gentamicin Sulfate	00338-0507-41	Baxter Healthcare Corporation	50	1
Gentamicin Sulfate	00338-0507-48	Baxter Healthcare Corporation	100	2
Gentamicin Sulfate	00338-0509-41	Baxter Healthcare Corporation	50	1
Gentamicin Sulfate	00338-0511-41	Baxter Healthcare Corporation	50	2
Gentamicin Sulfate	00404-9865-02	Henry Schein Inc.	2	1
Gentamicin Sulfate	00404-9866-20	Henry Schein Inc.	20	10
Gentamicin Sulfate	00409-1207-03	Pfizer Inc	25 × 2	25
Gentamicin Sulfate	51662-1508-03	HF Acquisition Co. LLC, DBA HealthFirst	25 × 20	250
Gentamicin Sulfate	51662-1597-03	HF Acquisition Co. LLC, DBA HealthFirst	25 × 2	25
Gentamicin Sulfate	55150-0401-25	Eugia US LLC	25 × 2	25
Gentamicin Sulfate	55150-0402-25	Eugia US LLC	25 × 2	25
Gentamicin Sulfate	55150-0403-25	Eugia US LLC	25 × 20	250
Gentamicin Sulfate	63323-0010-02	FreseniUS Kabi USA, LLC	25 × 2	25
Gentamicin Sulfate	63323-0010-20	FreseniUS Kabi USA, LLC	25 × 20	250
Gentamicin Sulfate	63323-0010-94	FreseniUS Kabi USA, LLC	25 × 2	25
Gentamicin Sulfate	63323-0010-95	FreseniUS Kabi USA, LLC	25 × 20	250
Gentamicin Sulfate	63323-0173-02	FreseniUS Kabi USA, LLC	25 × 2	25
Gentamicin Sulfate	63323-0173-94	FreseniUS Kabi USA, LLC	25 × 2	25

J1580: common questions

Is J1580 a CPT code?: No. J1580 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 J1580?: CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 21 NDCs under J1580, for Gentamicin Sulfate. The table on this page shows each one with its billing units per package.
What is the Medicare payment limit for J1580?: $1.849 per 80 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.

J1580 — Injection, garamycin, gentamicin, up to 80 mg