No. J0290 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 J0290?

CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 64 NDCs under J0290, for Ampicillin Sodium. The table on this page shows each one with its billing units per package.

What is the Medicare payment limit for J0290?

$0.619 per 500 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 J0290?

One unit of J0290 is 500 mg, as stated in the code's descriptor. Units to report = dose given ÷ 500 mg.

J0290 J-Code: Ampicillin sodium — Billing Units & NDCs

In short

J0290 is the HCPCS Level II code for injection, ampicillin sodium, 500 mg. CMS assigns NDCs for Ampicillin Sodium to it. One billing unit is 500 mg. The Medicare Part B payment limit is $0.619 per unit (October 1, 2026 through December 31, 2026).

Code

CMS HCPCS file

HCPCS codeJ0290

Billing unit500 mg

Descriptor: Injection, ampicillin sodium, 500 mg
Short descriptor: Ampicillin 500 mg inj
Code set: HCPCS Level II, maintained by CMS
Effective: Jan 1, 2000

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$0.619

Per500 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 ÷ 500 mg. For example, 50000 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 = 500 mg)

Modifier

NDC (11-digit)

NDC unit qualifier

NDC quantity

Enter the dose given to build the claim line.

NDCs billed under J0290

CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 64 NDCs to J0290 for Ampicillin Sodium. Billing units per package are CMS’s figures for this code’s unit.

NDCs assigned to J0290 in the CMS ASP crosswalk
Drug	NDC (11-digit)	Labeler	Package	Billing units per package
Ampicillin Sodium	00404-9803-99	Henry Schein Inc.	1	2
Ampicillin Sodium	00404-9816-99	Henry Schein Inc.	1	2
Ampicillin Sodium	00404-9818-99	Henry Schein Inc.	1	4
Ampicillin Sodium	00781-3402-95	Sandoz Inc.	10 × 1	5
Ampicillin Sodium	00781-3404-95	Sandoz Inc.	10 × 1	20
Ampicillin Sodium	00781-3407-95	Sandoz Inc.	10 × 1	10
Ampicillin Sodium	00781-3408-95	Sandoz Inc.	10 × 1	40
Ampicillin Sodium	00781-3409-95	Sandoz Inc.	10 × 1	200
Ampicillin Sodium	00781-3412-92	Sandoz Inc.	10 × 1	20
Ampicillin Sodium	00781-3413-92	Sandoz Inc.	10 × 1	40
Ampicillin Sodium	00781-9242-95	Sandoz Inc.	10 × 1	5
Ampicillin Sodium	00781-9261-95	Sandoz Inc.	10 × 1	20
Ampicillin Sodium	00781-9273-95	Sandoz Inc.	10 × 1	40
Ampicillin Sodium	00781-9402-95	Sandoz Inc.	10 × 1	5
Ampicillin Sodium	00781-9404-95	Sandoz Inc.	10 × 1	20
Ampicillin Sodium	00781-9407-95	Sandoz Inc.	10 × 1	10
Ampicillin Sodium	00781-9408-95	Sandoz Inc.	10 × 1	40
Ampicillin Sodium	00781-9409-95	Sandoz Inc.	10 × 1	200
Ampicillin Sodium	00781-9412-92	Sandoz Inc.	10 × 1	20
Ampicillin Sodium	00781-9413-92	Sandoz Inc.	10 × 1	40
Ampicillin Sodium	23155-0915-41	Heritage Pharmaceuticals Inc.	10 × 1	10
Ampicillin Sodium	23155-0916-41	Heritage Pharmaceuticals Inc.	10 × 1	20
Ampicillin Sodium	23155-0917-41	Heritage Pharmaceuticals Inc.	10 × 1	40
Ampicillin Sodium	25021-0134-10	Sagent Pharmaceuticals	10 × 1	5
Ampicillin Sodium	25021-0135-10	Sagent Pharmaceuticals	10 × 1	10
Ampicillin Sodium	25021-0136-10	Sagent Pharmaceuticals	10 × 1	20
Ampicillin Sodium	25021-0137-20	Sagent Pharmaceuticals	10 × 1	40
Ampicillin Sodium	25021-0197-99	Sagent Pharmaceuticals	1	20
Ampicillin Sodium	44567-0100-10	WG Critical Care, LLC	10 × 1	5
Ampicillin Sodium	44567-0101-10	WG Critical Care, LLC	10 × 1	10
Ampicillin Sodium	44567-0102-10	WG Critical Care, LLC	10 × 1	20
Ampicillin Sodium	44567-0103-10	WG Critical Care, LLC	10 × 1	40
Ampicillin Sodium	44567-0104-01	WG Critical Care, LLC	1	20
Ampicillin Sodium	50090-4552-00	A-S Medication Solutions	1	4
Ampicillin Sodium	51662-1560-03	HF Acquisition Co. LLC, DBA HealthFirst	10 × 1	40
Ampicillin Sodium	51662-1595-03	HF Acquisition Co. LLC, DBA HealthFirst	10 × 1	5
Ampicillin Sodium	55150-0113-10	Eugia US LLC	10 × 1	20
Ampicillin Sodium	55150-0114-20	Eugia US LLC	10 × 1	40
Ampicillin Sodium	55150-0115-99	Eugia US LLC	10 × 1	200
Ampicillin Sodium	65219-0014-10	FreseniUS Kabi USA, LLC	10 × 1	5
Ampicillin Sodium	65219-0016-10	FreseniUS Kabi USA, LLC	10 × 1	10
Ampicillin Sodium	65219-0018-10	FreseniUS Kabi USA, LLC	10 × 1	20
Ampicillin Sodium	65219-0020-23	FreseniUS Kabi USA, LLC	10 × 1	40
Ampicillin Sodium	66794-0220-41	Piramal Critical Care Inc	10 × 1	5
Ampicillin Sodium	66794-0222-41	Piramal Critical Care Inc	10 × 1	20
Ampicillin Sodium	66794-0223-41	Piramal Critical Care Inc	10 × 1	40
Ampicillin Sodium	66794-0224-15	Piramal Critical Care Inc	1	20
Ampicillin Sodium	70860-0112-15	Athenex Pharmaceutical Division, LLC	10 × 1	5
Ampicillin Sodium	70860-0113-15	Athenex Pharmaceutical Division, LLC	10 × 1	10
Ampicillin Sodium	70860-0114-15	Athenex Pharmaceutical Division, LLC	10 × 1	20
Ampicillin Sodium	70860-0115-26	Athenex Pharmaceutical Division, LLC	10 × 1	40
Ampicillin Sodium	70860-0118-99	Athenex Pharmaceutical Division, LLC	1	20
Ampicillin Sodium	72485-0421-10	Armas Pharmaceuticals Inc.	10 × 1	20
Ampicillin Sodium	72485-0422-10	Armas Pharmaceuticals Inc.	10 × 1	40
Ampicillin Sodium	72485-0423-10	Armas Pharmaceuticals Inc.	1	20
Ampicillin Sodium	72572-0016-10	Civica, Inc.	10 × 1	20
Ampicillin Sodium	72572-0017-10	Civica, Inc.	10 × 1	40
Ampicillin Sodium	72572-0093-10	Civica, Inc.	10 × 1	20
Ampicillin Sodium	72572-0094-10	Civica, Inc.	10 × 1	40
Ampicillin Sodium	72603-0221-10	Northstar RxLLC	10 × 1	10

Showing 60 of 64. The full list is in the CMS crosswalk file.

J0290: common questions

Is J0290 a CPT code?: No. J0290 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 J0290?: CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 64 NDCs under J0290, for Ampicillin Sodium. The table on this page shows each one with its billing units per package.
What is the Medicare payment limit for J0290?: $0.619 per 500 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 J0290?: One unit of J0290 is 500 mg, as stated in the code's descriptor. Units to report = dose given ÷ 500 mg. J-code billing units.

J0290 — Injection, ampicillin sodium, 500 mg