How many J2800 billing units are in a package of Robaxin?

CMS lists 10 to 25 billing units per package, depending on the NDC, where one unit is 10 ml. Units to report are based on the dose given, not the package.

No. J2800 is a HCPCS Level II code from CMS for the drug itself. Giving it, for example by injection or infusion, is usually reported with a separate CPT administration code.

Robaxin J-Code J2800 — Billing Units & NDCs

In short

Robaxin is billed under HCPCS J2800 — Injection, methocarbamol, up to 10 ml. One billing unit is 10 ml. CMS's crosswalk lists 4 Robaxin NDCs under this code.

J2800 code details

Reference

J2800: Injection, methocarbamol, up to 10 mlBilling unit: 10 ml
Labelers: Hikma Pharmaceuticals USA Inc.

Medicare Part B payment limit

CMS ASP file

Payment limit per unit$3.839

Per10 ml

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

Robaxin units and claim line

Enter the dose given to get the J2800 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.

Robaxin NDCs and billing units

From CMS’s ASP NDC–HCPCS crosswalk, effective October 1, 2026 through December 31, 2026. Billing units per package are CMS’s figures for the code’s unit.

Robaxin NDCs in the CMS ASP crosswalk
NDC (11-digit)	HCPCS	Labeler	Package	Billing units per package
00641-6103-10	J2800	Hikma Pharmaceuticals USA Inc.	10 × 10	10
00641-6103-25	J2800	Hikma Pharmaceuticals USA Inc.	25 × 10	25
00641-6217-10	J2800	Hikma Pharmaceuticals USA Inc.	10 × 10	10
00641-6217-25	J2800	Hikma Pharmaceuticals USA Inc.	25 × 10	25

Robaxin: common questions

What is the J-code for Robaxin?: Robaxin is billed under HCPCS J2800 — Injection, methocarbamol, up to 10 ml. One billing unit is 10 ml. CMS's crosswalk lists 4 Robaxin NDCs under this code.
How many J2800 billing units are in a package of Robaxin?: CMS lists 10 to 25 billing units per package, depending on the NDC, where one unit is 10 ml. Units to report are based on the dose given, not the package.
Is J2800 a CPT code?: No. J2800 is a HCPCS Level II code from CMS for the drug itself. Giving it, for example by injection or infusion, is usually reported with a separate CPT administration code.

Robaxin J-Code / HCPCS Code