Who bills the most Injection, tocilizumab, 1 mg (J3262) to Medicare in California?
Medicare Part B FFS · CY2024 · as published by CMS25 physician groups billed Injection, tocilizumab, 1 mg (J3262) to Medicare fee-for-service in California in 2024; the top five named groups hold 38% of that volume, and independent (non-hospital-affiliated) groups deliver 0%.
J3262 — Injection, tocilizumab, 1 mg · Source: CMS Medicare Physician & Other Practitioners PUF (Part B), CY2024 release. Medicare fee-for-service only.
Snapshot covers the whole California market — the table below shows the top 100 groups (free tier).
Medicare fee-for-service covers 49% of Medicare in California; Medicare Advantage penetration 45% → 51% since 2020.
| # | Physician group | City | St | Specialty | Providers | J3262 svcs | Share* | Phone |
|---|---|---|---|---|---|---|---|---|
| 1 | CENTER FOR RHEUMATOLOGY MEDICAL CORPORATION | LOS ANGELES | CA | RHEUMATOLOGY | 9 | 242,406 | 8.5% | (310) 659-7878 |
| 2 | INLAND RHEUMATOLOGY AND OSTEOPOROSIS MEDICAL GROUP INC | UPLAND | CA | RHEUMATOLOGY | 4 | 223,592 | 7.9% | (909) 982-0099 |
| 3 | SUTTER BAY MEDICAL FOUNDATION | PALO ALTO | CA | INTERNAL MEDICINE | 3716 | 145,928 | 5.1% | (415) 600-1020 |
| 4 | INFUSION EXPRESS OF CALIFORNIA INC | SUNNYVALE | CA | NURSE PRACTITIONER | 23 | 132,840 | 4.7% | (408) 228-3700 |
| 5 | BORIS D RATINER, MD, INC | TARZANA | CA | RHEUMATOLOGY | 6 | 122,948 | 4.3% | (818) 996-4077 |
| 6 | R.S. VENUTURUPALLI, M.D. INC | BEVERLY HILLS | CA | RHEUMATOLOGY | 7 | 119,025 | 4.2% | 3106520010120 |
| 7 | ROGER KORNU MD PC | TUSTIN | CA | NURSE PRACTITIONER | 3 | 110,920 | 3.9% | (714) 406-4461 |
| 8 | GHAROON PANAHI MD INC | FOUNTAIN VALLEY | CA | INTERNAL MEDICINE | 2 | 104,360 | 3.7% | (714) 825-0891 |
| 9 | SCRIPPS HEALTH | LA JOLLA | CA | PHYSICIAN ASSISTANT | 1431 | 98,440 | 3.5% | (858) 455-9100 |
| 10 | SANSUM CLINIC | SANTA BARBARA | CA | INTERNAL MEDICINE | 322 | 97,800 | 3.4% | (805) 681-7500 |
| 11 | ARTHRITIS AND OSTEOPOROSIS MEDICAL CENTER, INC | LA PALMA | CA | PHYSICIAN ASSISTANT | 9 | 86,128 | 3.0% | 7146701340236 |
| 12 | ARTHRITIS CONSULTANTS OF NORTH COUNTY A PROFESSIONAL CORPORATION | OCEANSIDE | CA | INTERNAL MEDICINE | 3 | 83,840 | 3.0% | (760) 724-5800 |
| 13 | RHEUMATOLOGY SERVICES MEDICAL GROUP | SAN LUIS OBISPO | CA | NURSE PRACTITIONER | 9 | 81,760 | 2.9% | 6616958385118 |
| 14 | AMERICAN ARTHRITIS AND RHEUMATOLOGY ASSOCIATES-CA PC | FRESNO | CA | RHEUMATOLOGY | 13 | 81,740 | 2.9% | (559) 732-9900 |
| 15 | NATALIE MACLEAN MD A PROFESSIONAL CORPORATION | ENCINITAS | CA | PHYSICIAN ASSISTANT | 3 | 72,750 | 2.6% | (760) 753-7374 |
| 16 | JIM C KIM MD INC | BAKERSFIELD | CA | NURSE PRACTITIONER | 2 | 72,640 | 2.6% | (661) 716-0333 |
| 17 | KATHY KARAMLOU MD INC A MEDICAL CORPORATION | NEWPORT BEACH | CA | NURSE PRACTITIONER | 2 | 64,360 | 2.3% | (949) 631-6500 |
| 18 | CABRILLO CENTER FOR RHEUMATIC DISEASE APC | SAN DIEGO | CA | RHEUMATOLOGY | 5 | 60,470 | 2.1% | (619) 334-4869 |
| 19 | CITY OF HOPE MEDICAL FOUNDATION | DUARTE | CA | NURSE PRACTITIONER | 942 | 54,160 | 1.9% | (626) 256-4673 |
| 20 | THAILA RAMANUJAM M D INC | SANTA CRUZ | CA | RHEUMATOLOGY | 4 | 50,882 | 1.8% | (831) 462-8960 |
| 21 | INFUSION4HEALTH | THOUSAND OAKS | CA | NURSE PRACTITIONER | 26 | 47,197 | 1.7% | (805) 719-3700 |
| 22 | OSO SPECIALTY INFUSION INC | IRVINE | CA | ALLERGY/IMMUNOLOGY | 10 | 47,160 | 1.7% | (949) 660-7126 |
| 23 | ARTHRITIS AND RHEUMATOLOGY MEDICAL ASSOCIATES INC | WALNUT CREEK | CA | RHEUMATOLOGY | 6 | 31,800 | 1.1% | (925) 210-1050 |
| 24 | SOUTHLAND ARTHRITES AND OSTEOPOROSIS MEDICAL CENTER INC | MENIFEE | CA | RHEUMATOLOGY | 6 | 24,640 | 0.9% | (951) 652-5000 |
| 25 | COMPLETE CARE COMMUNITY HEALTH CENTER, INC | LOS ANGELES | CA | NURSE PRACTITIONER | 46 | 6,540 | 0.2% | (323) 266-6700 |
*Share of California's disclosed Medicare-FFS services for J3262, counted once per clinician. Volume is placed in the state it was billed from, so this page ranks the groups actually billing J3262 in California — including groups registered elsewhere ("City" is each group's registered location). Group figures sum clinicians affiliated with exactly one group; clinicians in several groups are listed in each group's drill-down but not volume-attributed to any single group.
How to read this. Figures are Medicare fee-for-service only — not all-payer — from the CMS Medicare Physician & Other Practitioners Public Use File (Part B), CY2024 release. CMS suppresses any provider×code row under 11 beneficiaries, so a missing group means "suppressed," never zero. "Charges" are provider-submitted amounts, not payments. Groups are ranked by measured service volume attributed to clinicians in exactly one group — clinicians affiliated with several groups are listed in rosters but never volume-attributed to a single group — a direct read of the public record, not a rating or quality score. Full method: Methods & Sources.
Comparing against an all-payer estimate?
These are exact counts from Medicare fee-for-service claims — roughly a third to half of most procedure markets, depending on payer mix. Modeled all-payer databases project the remainder statistically; we publish the audited floor and label it as such. Same market, different denominator. How the numbers reconcile →