J9312 is the HCPCS code for: Injection, rituximab, 10 mg. In 2024, 336 providers billed J9312 1.3M times, an estimated $76.9M paid by Medicare.
J9312 is a Part B drug code: Medicare pays an ASP-based rate of $73.28 per 10 mg (2026 Q3 ASP drug pricing file). Total payment per patient depends on the dose billed.
A billed "service" on this code is one 10 mg unit, not one patient visit. That's why the service counts below run high.
What Medicare actually paid per service in 2024, on average: $60.20 (observed payment across all settings and modifiers, not a fee-schedule rate).
The top 5 billers nationally, ranked by 2024 Medicare service volume.
| # | Provider | Specialty | Location | Services | Est. Medicare paid |
|---|---|---|---|---|---|
| 1 | Barry Eibschutz, M.D. | Rheumatology | San Luis Obispo, CA | 24,500 | $1.5M |
| 2 | Thomas Niederman, MD,PHD | Medical Oncology | Boynton Beach, FL | 18,790 | $1.2M |
| 3 | Vinh-Linh Nguyen, MD | Hematology-Oncology | Bakersfield, CA | 13,760 | $834K |
| 4 | Sona Kamat, M.D. | Internal Medicine | Saint Louis, MO | 13,300 | $806K |
| 5 | Theerapol Prasertsuntarasai, MD | Rheumatology | Lubbock, TX | 13,050 | $794K |
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