No. J1442 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 J1442?

CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 8 NDCs under J1442, for Neupogen. The table on this page shows each one with its billing units per package.

What is the Medicare payment limit for J1442?

$0.994 per 1 mcg, 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 J1442?

One unit of J1442 is 1 microgram, as stated in the code's descriptor. Units to report = dose given ÷ 1 microgram.

J1442 J-Code: Neupogen (filgrastim) — Billing Units & NDCs

In short

J1442 is the HCPCS Level II code for injection, filgrastim (g-csf), excludes biosimilars, 1 microgram. CMS assigns NDCs for Neupogen to it. One billing unit is 1 microgram. The Medicare Part B payment limit is $0.994 per unit (October 1, 2026 through December 31, 2026).

Code

CMS HCPCS file

HCPCS codeJ1442

Billing unit1 microgram

Descriptor: Injection, filgrastim (g-csf), excludes biosimilars, 1 microgram
Short descriptor: Inj filgrastim excl biosimil
Code set: HCPCS Level II, maintained by CMS
Effective: Jan 1, 2016

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$0.994

Per1 mcg

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 J1442

CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 8 NDCs to J1442 for Neupogen. Billing units per package are CMS’s figures for this code’s unit.

NDCs assigned to J1442 in the CMS ASP crosswalk
Drug	NDC (11-digit)	Labeler	Package	Billing units per package
Neupogen	55513-0209-10	Amgen Inc	10 × 0.8	4,800
Neupogen	55513-0209-20	Amgen Inc	10 × 0.8	4,800
Neupogen	55513-0209-91	Amgen Inc	0.8	480
Neupogen	55513-0530-10	Amgen Inc	10 × 1	3,000
Neupogen	55513-0530-20	Amgen Inc	10 × 1	3,000
Neupogen	55513-0546-10	Amgen Inc	10 × 1.6	4,800
Neupogen	55513-0924-10	Amgen Inc	10 × 0.5	3,000
Neupogen	55513-0924-91	Amgen Inc	0.5	300

J1442: common questions

Is J1442 a CPT code?: No. J1442 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 J1442?: CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 8 NDCs under J1442, for Neupogen. The table on this page shows each one with its billing units per package.
What is the Medicare payment limit for J1442?: $0.994 per 1 mcg, 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 J1442?: One unit of J1442 is 1 microgram, as stated in the code's descriptor. Units to report = dose given ÷ 1 microgram. J-code billing units.

J1442 — Injection, filgrastim (g-csf), excludes biosimilars, 1 microgram