No. J0587 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 J0587?

CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 3 NDCs under J0587, for Myobloc. The table on this page shows each one with its billing units per package.

What is the Medicare payment limit for J0587?

$13.301 per 100 units, 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 J0587?

One unit of J0587 is 100 units, as stated in the code's descriptor. Units to report = dose given ÷ 100 units.

J0587 J-Code: Myobloc (rimabotulinumtoxinb)

In short

J0587 is the HCPCS Level II code for injection, rimabotulinumtoxinb, 100 units. CMS assigns NDCs for Myobloc to it. One billing unit is 100 units. The Medicare Part B payment limit is $13.301 per unit (October 1, 2026 through December 31, 2026).

Code

CMS HCPCS file

HCPCS codeJ0587

Billing unit100 units

Descriptor: Injection, rimabotulinumtoxinb, 100 units
Short descriptor: Inj, rimabotulinumtoxinb
Code set: HCPCS Level II, maintained by CMS
Effective: Jan 1, 2010

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$13.301

Per100 units

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 ÷ 100 units. For example, 10000 units is 100 units. Enter the dose to get the units and the NDC line for the CMS-1500 and the 837P.

Dose given (units)

HCPCS units (1 unit = 100 units)

Modifier

NDC (11-digit)

NDC unit qualifier

NDC quantity

Enter the dose given to build the claim line.

NDCs billed under J0587

CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 3 NDCs to J0587 for Myobloc. Billing units per package are CMS’s figures for this code’s unit.

NDCs assigned to J0587 in the CMS ASP crosswalk
Drug	NDC (11-digit)	Labeler	Package	Billing units per package
Myobloc	10454-0710-10	Supernus Pharmaceuticals, Inc.	0.5	25
Myobloc	10454-0711-10	Supernus Pharmaceuticals, Inc.	1	50
Myobloc	10454-0712-10	Supernus Pharmaceuticals, Inc.	2	100

J0587: common questions

Is J0587 a CPT code?: No. J0587 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 J0587?: CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 3 NDCs under J0587, for Myobloc. The table on this page shows each one with its billing units per package.
What is the Medicare payment limit for J0587?: $13.301 per 100 units, 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 J0587?: One unit of J0587 is 100 units, as stated in the code's descriptor. Units to report = dose given ÷ 100 units. J-code billing units.

J0587 — Injection, rimabotulinumtoxinb, 100 units