No. J1212 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 J1212?

CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 1 NDC under J1212, for Rimso-50. The table on this page shows each one with its billing units per package.

What is the Medicare payment limit for J1212?

$748.813 per 50 ml, 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 J1212?

One unit of J1212 is 50 ml, as stated in the code's descriptor. Units to report = dose given ÷ 50 ml.

J1212 J-Code: Rimso-50 (dmso) — Billing Units & NDCs

In short

J1212 is the HCPCS Level II code for injection, dmso, dimethyl sulfoxide, 50%, 50 ml. CMS assigns NDCs for Rimso-50 to it. One billing unit is 50 ml. The Medicare Part B payment limit is $748.813 per unit (October 1, 2026 through December 31, 2026).

Code

CMS HCPCS file

HCPCS codeJ1212

Billing unit50 ml

Descriptor: Injection, dmso, dimethyl sulfoxide, 50%, 50 ml
Short descriptor: Dimethyl sulfoxide 50% 50 ml
Code set: HCPCS Level II, maintained by CMS
Effective: Jan 1, 2017

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$748.813

Per50 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

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 J1212

CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 1 NDC to J1212 for Rimso-50. Billing units per package are CMS’s figures for this code’s unit.

NDCs assigned to J1212 in the CMS ASP crosswalk
Drug	NDC (11-digit)	Labeler	Package	Billing units per package
Rimso-50	67457-0177-50	Mylan Institutional LLC	50	1

J1212: common questions

Is J1212 a CPT code?: No. J1212 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 J1212?: CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 1 NDC under J1212, for Rimso-50. The table on this page shows each one with its billing units per package.
What is the Medicare payment limit for J1212?: $748.813 per 50 ml, 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 J1212?: One unit of J1212 is 50 ml, as stated in the code's descriptor. Units to report = dose given ÷ 50 ml. J-code billing units.

J1212 — Injection, dmso, dimethyl sulfoxide, 50%, 50 ml