No. J9039 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 J9039?

CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 2 NDCs under J9039, for Blincyto. The table on this page shows each one with its billing units per package.

What is the Medicare payment limit for J9039?

$173.047 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 J9039?

One unit of J9039 is 1 microgram, as stated in the code's descriptor. Units to report = dose given ÷ 1 microgram.

J9039 J-Code: Blincyto (blinatumomab) — Billing Units

In short

J9039 is the HCPCS Level II code for injection, blinatumomab, 1 microgram. CMS assigns NDCs for Blincyto to it. One billing unit is 1 microgram. The Medicare Part B payment limit is $173.047 per unit (October 1, 2026 through December 31, 2026).

Code

CMS HCPCS file

HCPCS codeJ9039

Billing unit1 microgram

Descriptor: Injection, blinatumomab, 1 microgram
Short descriptor: Injection, blinatumomab
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$173.047

Per1 mcg

Coinsurance17.991%

Effective October 1, 2026 through December 31, 2026. Payment allowance limits subject to the ASP methodology are based on 2Q26 ASP data. CMS note: Inflation-adjusted coinsurance. 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 J9039

CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 2 NDCs to J9039 for Blincyto. Billing units per package are CMS’s figures for this code’s unit.

NDCs assigned to J9039 in the CMS ASP crosswalk
Drug	NDC (11-digit)	Labeler	Package	Billing units per package
Blincyto	55513-0160-01	Amgen Inc	1	35
Blincyto	55513-0160-21	Amgen Inc	1	35

J9039: common questions

Is J9039 a CPT code?: No. J9039 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 J9039?: CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 2 NDCs under J9039, for Blincyto. The table on this page shows each one with its billing units per package.
What is the Medicare payment limit for J9039?: $173.047 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 J9039?: One unit of J9039 is 1 microgram, as stated in the code's descriptor. Units to report = dose given ÷ 1 microgram. J-code billing units.

J9039 — Injection, blinatumomab, 1 microgram