No. J1650 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 J1650?

CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 144 NDCs under J1650, for Enoxaparin Sodium and Lovenox. The table on this page shows each one with its billing units per package.

What is the Medicare payment limit for J1650?

$0.497 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.

What is one billing unit of J1650?

One unit of J1650 is 10 mg, as stated in the code's descriptor. Units to report = dose given ÷ 10 mg.

J1650 J-Code: Lovenox (enoxaparin sodium) — Billing Units

In short

J1650 is the HCPCS Level II code for injection, enoxaparin sodium, 10 mg. CMS assigns NDCs for Enoxaparin Sodium and Lovenox to it. One billing unit is 10 mg. The Medicare Part B payment limit is $0.497 per unit (October 1, 2026 through December 31, 2026).

Code

CMS HCPCS file

HCPCS codeJ1650

Billing unit10 mg

Descriptor: Injection, enoxaparin sodium, 10 mg
Short descriptor: Inj enoxaparin sodium
Code set: HCPCS Level II, maintained by CMS
Effective: Jan 1, 2004

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$0.497

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

Units = dose given ÷ 10 mg. For example, 1000 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 = 10 mg)

Modifier

NDC (11-digit)

NDC unit qualifier

NDC quantity

Enter the dose given to build the claim line.

NDCs billed under J1650

CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 144 NDCs to J1650 for Enoxaparin Sodium and Lovenox. Billing units per package are CMS’s figures for this code’s unit.

NDCs assigned to J1650 in the CMS ASP crosswalk
Drug	NDC (11-digit)	Labeler	Package	Billing units per package
Enoxaparin Sodium	00548-5601-00	Amphastar Pharmaceuticals, Inc.	10 × 0.3	30
Enoxaparin Sodium	00548-5602-00	Amphastar Pharmaceuticals, Inc.	10 × 0.4	40
Enoxaparin Sodium	00548-5603-00	Amphastar Pharmaceuticals, Inc.	10 × 0.6	60
Enoxaparin Sodium	00548-5604-00	Amphastar Pharmaceuticals, Inc.	10 × 0.8	80
Enoxaparin Sodium	00548-5605-00	Amphastar Pharmaceuticals, Inc.	10 × 1	100
Enoxaparin Sodium	00548-5606-00	Amphastar Pharmaceuticals, Inc.	10 × 0.8	120
Enoxaparin Sodium	00548-5607-00	Amphastar Pharmaceuticals, Inc.	10 × 1	150
Enoxaparin Sodium	00548-5608-00	Amphastar Pharmaceuticals, Inc.	3	30
Enoxaparin Sodium	00781-3238-63	Sandoz Inc.	10 × 0.3	30
Enoxaparin Sodium	00781-3246-64	Sandoz Inc.	10 × 0.4	40
Enoxaparin Sodium	00781-3256-66	Sandoz Inc.	10 × 0.6	60
Enoxaparin Sodium	00781-3262-68	Sandoz Inc.	10 × 0.8	80
Enoxaparin Sodium	00781-3268-69	Sandoz Inc.	10 × 1	100
Enoxaparin Sodium	00781-3298-68	Sandoz Inc.	10 × 0.8	120
Enoxaparin Sodium	00781-3299-69	Sandoz Inc.	10 × 1	150
Enoxaparin Sodium	00955-1003-10	Sanofi-Aventis U.S. LLC	10 × 0.3	30
Enoxaparin Sodium	00955-1004-10	Sanofi-Aventis U.S. LLC	10 × 0.4	40
Enoxaparin Sodium	00955-1006-10	Sanofi-Aventis U.S. LLC	10 × 0.6	60
Enoxaparin Sodium	00955-1008-10	Sanofi-Aventis U.S. LLC	10 × 0.8	80
Enoxaparin Sodium	00955-1010-10	Sanofi-Aventis U.S. LLC	10 × 1	100
Enoxaparin Sodium	00955-1012-10	Sanofi-Aventis U.S. LLC	10 × 0.8	120
Enoxaparin Sodium	00955-1015-10	Sanofi-Aventis U.S. LLC	10 × 1	150
Enoxaparin Sodium	00955-1016-01	Sanofi-Aventis U.S. LLC	3	30
Enoxaparin Sodium	16714-0006-10	Northstar RxLLC	10 × 0.3	30
Enoxaparin Sodium	16714-0016-10	Northstar RxLLC	10 × 0.4	40
Enoxaparin Sodium	16714-0026-10	Northstar RxLLC	10 × 0.6	60
Enoxaparin Sodium	16714-0036-10	Northstar RxLLC	10 × 0.8	80
Enoxaparin Sodium	16714-0046-10	Northstar RxLLC	10 × 1	100
Enoxaparin Sodium	16714-0056-10	Northstar RxLLC	10 × 0.8	120
Enoxaparin Sodium	16714-0066-10	Northstar RxLLC	10 × 1	150
Enoxaparin Sodium	25021-0410-70	Sagent Pharmaceuticals	10 × 0.3	30
Enoxaparin Sodium	25021-0410-71	Sagent Pharmaceuticals	10 × 1	100
Enoxaparin Sodium	25021-0410-76	Sagent Pharmaceuticals	10 × 0.4	40
Enoxaparin Sodium	25021-0410-77	Sagent Pharmaceuticals	10 × 0.6	60
Enoxaparin Sodium	25021-0410-78	Sagent Pharmaceuticals	10 × 0.8	80
Enoxaparin Sodium	25021-0411-70	Sagent Pharmaceuticals	10 × 0.8	120
Enoxaparin Sodium	25021-0411-71	Sagent Pharmaceuticals	10 × 1	150
Enoxaparin Sodium	60505-0792-04	Apotex Corp	10 × 0.4	40
Enoxaparin Sodium	60505-0794-04	Apotex Corp	10 × 0.8	80
Enoxaparin Sodium	60505-0795-04	Apotex Corp	10 × 1	100
Enoxaparin Sodium	60505-0796-04	Apotex Corp	10 × 0.8	120
Enoxaparin Sodium	60505-0798-04	Apotex Corp	10 × 1	150
Enoxaparin Sodium	63323-0531-90	FreseniUS Kabi USA, LLC	10 × 0.8	80
Enoxaparin Sodium	63323-0531-98	FreseniUS Kabi USA, LLC	10 × 0.8	80
Enoxaparin Sodium	63323-0533-83	FreseniUS Kabi USA, LLC	10 × 0.3	30
Enoxaparin Sodium	63323-0533-93	FreseniUS Kabi USA, LLC	10 × 0.3	30
Enoxaparin Sodium	63323-0535-87	FreseniUS Kabi USA, LLC	10 × 0.4	40
Enoxaparin Sodium	63323-0535-98	FreseniUS Kabi USA, LLC	10 × 0.4	40
Enoxaparin Sodium	63323-0539-03	FreseniUS Kabi USA, LLC	3	30
Enoxaparin Sodium	63323-0559-65	FreseniUS Kabi USA, LLC	10 × 0.3	30
Enoxaparin Sodium	63323-0559-93	FreseniUS Kabi USA, LLC	10 × 0.3	30
Enoxaparin Sodium	63323-0564-65	FreseniUS Kabi USA, LLC	10 × 0.4	40
Enoxaparin Sodium	63323-0564-97	FreseniUS Kabi USA, LLC	10 × 0.4	40
Enoxaparin Sodium	63323-0566-65	FreseniUS Kabi USA, LLC	10 × 0.6	60
Enoxaparin Sodium	63323-0566-98	FreseniUS Kabi USA, LLC	10 × 0.6	60
Enoxaparin Sodium	63323-0584-65	FreseniUS Kabi USA, LLC	10 × 0.8	80
Enoxaparin Sodium	63323-0584-99	FreseniUS Kabi USA, LLC	10 × 0.8	80
Enoxaparin Sodium	63323-0586-65	FreseniUS Kabi USA, LLC	10 × 1	100
Enoxaparin Sodium	63323-0586-96	FreseniUS Kabi USA, LLC	10 × 1	100
Enoxaparin Sodium	63323-0589-94	FreseniUS Kabi USA, LLC	10 × 1	150

Showing 60 of 144. The full list is in the CMS crosswalk file.

J1650: common questions

Is J1650 a CPT code?: No. J1650 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 J1650?: CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 144 NDCs under J1650, for Enoxaparin Sodium and Lovenox. The table on this page shows each one with its billing units per package.
What is the Medicare payment limit for J1650?: $0.497 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.
What is one billing unit of J1650?: One unit of J1650 is 10 mg, as stated in the code's descriptor. Units to report = dose given ÷ 10 mg. J-code billing units.

J1650 — Injection, enoxaparin sodium, 10 mg