Who bills the most Injection, fosaprepitant, 1 mg (J1453) to Medicare in California?
Medicare Part B FFS · CY2024 · as published by CMS19 physician groups billed Injection, fosaprepitant, 1 mg (J1453) to Medicare fee-for-service in California in 2024; the top five named groups hold 72% of that volume, and independent (non-hospital-affiliated) groups deliver 0%.
J1453 — Injection, fosaprepitant, 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 | J1453 svcs | Share* | Phone |
|---|---|---|---|---|---|---|---|---|
| 1 | THE REGENTS OF THE UNIVERSITY OF CALIFORNIA | LOS ANGELES | CA | INTERNAL MEDICINE | 1424 | 311,550 | 30.5% | (310) 825-7922 |
| 2 | SUTTER BAY MEDICAL FOUNDATION | PALO ALTO | CA | INTERNAL MEDICINE | 3716 | 110,550 | 10.8% | (415) 600-1020 |
| 3 | DESERT HEMATOLOGY-ONCOLOGY MEDICAL GROUP INC | RANCHO MIRAGE | CA | HEMATOLOGY/ONCOLOGY | 10 | 93,300 | 9.1% | (760) 568-3613 |
| 4 | TORRANCE HEALTH ASSOCIATION INC | TORRANCE | CA | FAMILY PRACTICE | 298 | 68,270 | 6.7% | (310) 257-7260 |
| 5 | SIERRA HEMATOLOGY AND ONCOLOGY MEDICAL CENTERS | CARMICHAEL | CA | HEMATOLOGY/ONCOLOGY | 16 | 57,750 | 5.6% | (916) 962-1544 |
| 6 | SANSUM CLINIC | SANTA BARBARA | CA | INTERNAL MEDICINE | 322 | 51,900 | 5.1% | (805) 681-7500 |
| 7 | MICHAEL P SHERMAN MD PHD A MEDICAL CORPORATION | WALNUT CREEK | CA | HEMATOLOGY/ONCOLOGY | 13 | 36,000 | 3.5% | (925) 939-9610 |
| 8 | CEDARS-SINAI MEDICAL CARE FOUNDATION | LOS ANGELES | CA | PHYSICIAN ASSISTANT | 1699 | 35,400 | 3.5% | (310) 423-0674 |
| 9 | STANFORD HEALTH CARE | STANFORD | CA | DIAGNOSTIC RADIOLOGY | 3039 | 29,850 | 2.9% | (650) 723-4000 |
| 10 | EPIC CARE | PLEASANT HILL | CA | HEMATOLOGY/ONCOLOGY | 54 | 20,550 | 2.0% | (925) 687-2570 |
| 11 | HEMATOLOGY AND ONCOLOGY ASSOCIATES OF NORTHERN CALIFORNIA | FOLSOM | CA | HEMATOLOGY/ONCOLOGY | 2 | 18,900 | 1.8% | (916) 250-0377 |
| 12 | MONTEREY BAY ONCOLOGY A MEDICAL CORPORATION | MONTEREY | CA | HEMATOLOGY/ONCOLOGY | 10 | 12,450 | 1.2% | (831) 375-4105 |
| 13 | UC REGENTS | ORANGE | CA | INTERNAL MEDICINE | 296 | 10,800 | 1.1% | (714) 456-7002 |
| 14 | BASS MEDICAL GROUP | WALNUT CREEK | CA | OTOLARYNGOLOGY | 318 | 10,200 | 1.0% | — |
| 15 | JOHN MUIR PHYSICIAN NETWORK | WALNUT CREEK | CA | FAMILY PRACTICE | 489 | 8,700 | 0.9% | (925) 296-9720 |
| 16 | LOS ANGELES HEMATOLOGY-ONCOLOGY MEDICAL GROUP | LOS ANGELES | CA | HEMATOLOGY/ONCOLOGY | 51 | 8,106 | 0.8% | (213) 977-1214 |
| 17 | KAWEAH DELTA HEALTH CARE DISTRICT | VISALIA | CA | DIAGNOSTIC RADIOLOGY | 101 | 5,850 | 0.6% | (559) 624-6090 |
| 18 | DOCS MEDICAL GROUP INC | REDDING | CA | PHYSICIAN ASSISTANT | 13 | 3,600 | 0.4% | (530) 243-8667 |
| 19 | UCSF MEDICAL GROUP BUSINESS SERVICES | SAN FRANCISCO | CA | DIAGNOSTIC RADIOLOGY | 1548 | 3,150 | 0.3% | (415) 476-1000 |
*Share of California's disclosed Medicare-FFS services for J1453, counted once per clinician. Volume is placed in the state it was billed from, so this page ranks the groups actually billing J1453 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 →