CareCost Vials
3 × 250 mg
1 billing unit = 10 mg
750 mg dose → 75 billing units
J0129 · abatacept
250 mg single-dose vial · JZ at every adult weight band
Calculate this patient's units ↓500 mg (under 60 kg), 750 mg (60 to 100 kg) or 1,000 mg (over 100 kg), every 4 weeks after weeks 0, 2 and 4
This Orencia claim carries straight into Claim Check.
Claim Check builds the whole visit — J0129 units, the administration line, the modifiers and the Medicare allowed amount — and prices it against your payer's rate. The estimate turns the same visit into what the patient owes.
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Patient owes, 750 mg
Change the payer and the estimate re-prices against that payer's own published rate. The result is a good faith estimate for the patient.
J0129 bills 1 unit per 10 mg: ordered dose ÷ 10 mg = billing units. Orencia is not dosed per kilogram for the adult rheumatology indications; the dose is read off three body-weight bands, so a patient's exact weight decides which flat dose applies, not the arithmetic underneath it.
Orencia ships as a 250 mg single-dose vial, so every adult band draws a whole number of vials with nothing left over: two vials for the under-60-kg band, three for the 60-to-100-kg band, four for the over-100-kg band. Because the draw always matches the dose exactly, JZ (no drug discarded) is the modifier on every adult weight-banded infusion.
Medicare pays $45.937 per 10 mg unit (ASP+6%), effective for claims in Q4 2026 — $3,445.27
for the 75-unit default dose above.
| Body weight | Dose | Billing units | Vials | Modifier |
|---|---|---|---|---|
| Under 60 kg | 500 mg | 50 | 2 × 250 mg | JZ |
| 60 to 100 kg (default) | 750 mg | 75 | 3 × 250 mg | JZ |
| Over 100 kg | 1,000 mg | 100 | 4 × 250 mg | JZ |
Each band is an exact multiple of the 250 mg vial, so JZ applies at every adult weight band and no drug is
ever discarded on a standard rheumatology infusion. A claim at the 750 mg default bills as
J0129 × 75 JZ plus 96365 × 1 for the 30-minute infusion.
| Code | Description | Units | Modifier |
|---|---|---|---|
| J0129 | Injection, abatacept, 10 mg | 75 | JZ |
| 96365 | IV infusion, initial, up to 1 hour | 1 | — |
JZ — no discarded drug from a single-dose container. JW — discarded drug from a single-dose container, reported on its own claim line. One of the two is required on every J0129 claim per CMS's July 1, 2023 single-dose container policy.
J0129 × 75 JZ · 96365 × 1. The under-60-kg and over-100-kg bands work out
the same way, since every adult band is an exact multiple of the 250 mg vial.
J0129 × 30 · J0129 × 20 JW · 96365 × 1. Acute GvHD prophylaxis
is dosed the same way, 10 mg/kg to a maximum of 1,000 mg, as a 60-minute infusion still billed 96365 alone
— 96366 only applies once an infusion runs past 90 minutes.
96365 covers the initial hour of a therapeutic infusion. Orencia's 30-minute infusion for RA, PsA and pJIA fits inside that window, so bill 96365 alone; the add-on code 96366 (each additional hour) only applies once an infusion runs past 90 minutes. The 60-minute acute GvHD prophylaxis infusion is still billed 96365 alone for the same reason. 96413 is the chemotherapy administration family; Orencia is a T-cell costimulation modulator, not a chemotherapy agent, so 96413 is the wrong code unless a payer's own policy says otherwise.
The MUE for J0129 is 100 units per day, the labeled maximum of 1,000 mg. The over-100-kg band's dose (100 units) sits right at that limit; a claim line above 100 units for a single day fails the MUE edit. The under-60-kg and 60-to-100-kg bands (50 and 75 units) clear the edit with room to spare, as does the per-kilogram pediatric dosing, which the label caps at the same 1,000 mg maximum.
Orencia IV ships in one size: a 250 mg lyophilized powder single-dose vial, reconstituted with 10 mL and diluted to 100 mL before infusion. J0129 (“Injection, abatacept, 10 mg”) is the HCPCS code for the IV product. The subcutaneous 125 mg weekly prefilled syringe and ClickJect autoinjector are a separate, pharmacy-benefit product: some payers list them under the same J0129 descriptor, but they are dispensed through pharmacy rather than billed as a buy-and-bill infusion claim, so a patient who switches to the syringe drops off this claim line.
Remicade (J1745), Actemra IV (J3262) and Simponi Aria (J1602) are other infused biologics used for RA and PsA, each carrying its own J-code and its own units page. See the FDA Orencia label (BLA 125118) for full dosing and administration instructions, or the current Medicare rate for J0129 →.
75 billing units. J0129 bills 1 unit per 10 mg, and 750 mg is the middle weight band, 60 to 100 kg, drawn from three 250 mg vials with nothing discarded.
50 units for the under-60-kg band (500 mg, two vials), 75 units for the 60-to-100-kg band (750 mg, three vials), and 100 units for the over-100-kg band (1,000 mg, four vials), each billed with JZ.
JZ on every adult weight-banded dose, since each band draws a whole number of 250 mg vials with nothing left over. JW can apply on the per-kilogram pediatric doses — a 300 mg dose from two vials, for example, discards 200 mg, 20 units, on its own JW line.
100 units per day for J0129, the labeled maximum of 1,000 mg. A claim line above 100 units for a single day fails the MUE edit.
Per 10 mg. J0129 is defined as 10 mg per billing unit, so a 750 mg dose is 75 units, not 750.
Data current: pricing Q4 2026 · payer policies Aug 2026
Sources: CMS ASP pricing files (Q4 2026); FDA-approved prescribing information (ORENCIA label, DailyMed, BLA 125118); CMS single-dose container JW/JZ policy (effective July 1, 2023); CMS NCCI MUE table (practitioner services, 2026 Q3); CPT codebook administration-code guidance; 29 commercial payer medical policies in the abatacept Clearance corpus.
Reviewed September 21, 2026 by Erin Rose, CareCost Estimate founder. Methodology →