No. J1447 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 J1447?

CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 10 NDCs under J1447, for Granix. The table on this page shows each one with its billing units per package.

What is the Medicare payment limit for J1447?

$0.279 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 J1447?

One unit of J1447 is 1 microgram, as stated in the code's descriptor. Units to report = dose given ÷ 1 microgram.

J1447 J-Code: Granix (tbo-filgrastim) — Billing Units

In short

J1447 is the HCPCS Level II code for injection, tbo-filgrastim, 1 microgram. CMS assigns NDCs for Granix to it. One billing unit is 1 microgram. The Medicare Part B payment limit is $0.279 per unit (October 1, 2026 through December 31, 2026).

Code

CMS HCPCS file

HCPCS codeJ1447

Billing unit1 microgram

Descriptor: Injection, tbo-filgrastim, 1 microgram
Short descriptor: Inj tbo filgrastim 1 microg
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$0.279

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 J1447

CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 10 NDCs to J1447 for Granix. Billing units per package are CMS’s figures for this code’s unit.

NDCs assigned to J1447 in the CMS ASP crosswalk
Drug	NDC (11-digit)	Labeler	Package	Billing units per package
Granix	63459-0910-11	Cephalon, LLC	0.5	300
Granix	63459-0910-15	Cephalon, LLC	10 × 0.5	3,000
Granix	63459-0910-17	Cephalon, LLC	0.5	300
Granix	63459-0910-36	Cephalon, LLC	5 × 0.5	1,500
Granix	63459-0912-11	Cephalon, LLC	0.8	480
Granix	63459-0912-15	Cephalon, LLC	10 × 0.8	4,800
Granix	63459-0912-17	Cephalon, LLC	0.8	480
Granix	63459-0912-36	Cephalon, LLC	5 × 0.8	2,400
Granix	63459-0918-59	Cephalon, LLC	10 × 1	3,000
Granix	63459-0920-59	Cephalon, LLC	10 × 1.6	4,800

J1447: common questions

Is J1447 a CPT code?: No. J1447 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 J1447?: CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 10 NDCs under J1447, for Granix. The table on this page shows each one with its billing units per package.
What is the Medicare payment limit for J1447?: $0.279 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 J1447?: One unit of J1447 is 1 microgram, as stated in the code's descriptor. Units to report = dose given ÷ 1 microgram. J-code billing units.

J1447 — Injection, tbo-filgrastim, 1 microgram