HCPCS Level II drug code
J0129 — Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered)
In short
J0129 is the HCPCS Level II code for injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered). CMS assigns NDCs for Orencia to it. One billing unit is 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician. The Medicare Part B payment limit is $45.937 per unit (October 1, 2026 through December 31, 2026).
Code
CMS HCPCS file- Descriptor
- Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered)
- Short descriptor
- Abatacept injection
- Code set
- HCPCS Level II, maintained by CMS
- Effective
- Jan 1, 2012
The billing unit is read from the descriptor. Confirm it against the CMS file before billing.
Medicare Part B payment limit
CMS ASP fileEffective October 1, 2026 through December 31, 2026. Payment allowance limits subject to the ASP methodology are based on 2Q26 ASP data. CMS note: "lesser of" methodology applied. A payment limit is not a coverage decision; the Medicare contractor decides coverage. CMS ASP pricing files
Units and claim line
Units = dose given ÷ 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician. For example, 1000 mg is 100 units. Enter the dose to get the units and the NDC line for the CMS-1500 and the 837P.
Enter the dose given to build the claim line.
NDCs billed under J0129
CMS’s ASP NDC–HCPCS crosswalk (effective October 1, 2026 through December 31, 2026) assigns 5 NDCs to J0129 for Orencia. Billing units per package are CMS’s figures for this code’s unit.
| Drug | NDC (11-digit) | Labeler | Package | Billing units per package |
|---|---|---|---|---|
| Orencia | 00003-2187-13 | E.R. Squibb & Sons, L.L.C. | 1 | 25 |
| Orencia | 00003-2188-11 | E.R. Squibb & Sons, L.L.C. | 4 × 1 | 50 |
| Orencia | 00003-2188-51 | E.R. Squibb & Sons, L.L.C. | 4 × 1 | 50 |
| Orencia | 00003-2814-11 | E.R. Squibb & Sons, L.L.C. | 4 × 0.4 | 20 |
| Orencia | 00003-2818-11 | E.R. Squibb & Sons, L.L.C. | 4 × 0.7 | 35 |
J0129: common questions
- Is J0129 a CPT code?
- No. J0129 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 J0129?
- CMS's ASP crosswalk for October 1, 2026 through December 31, 2026 lists 5 NDCs under J0129, for Orencia. The table on this page shows each one with its billing units per package.
- What is the Medicare payment limit for J0129?
- $45.937 per 10 mg, 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 J0129?
- One unit of J0129 is 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, as stated in the code's descriptor. Units to report = dose given ÷ 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician. J-code billing units.