Who bills the most Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session (G6015) to Medicare in California?
Medicare Part B FFS · CY2024 · as published by CMS38 physician groups billed Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session (G6015) to Medicare fee-for-service in California in 2024; the top five named groups hold 48% of that volume, and independent (non-hospital-affiliated) groups deliver 3%.
G6015 — Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session · 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 | G6015 svcs | Share* | Phone |
|---|---|---|---|---|---|---|---|---|
| 1 | SUTTER BAY MEDICAL FOUNDATION | PALO ALTO | CA | INTERNAL MEDICINE | 3716 | 10,700 | 10.2% | (415) 600-1020 |
| 2 | CITY OF HOPE MEDICAL FOUNDATION | DUARTE | CA | NURSE PRACTITIONER | 942 | 9,577 | 9.1% | (626) 256-4673 |
| 3 | SUTTER VALLEY MEDICAL FOUNDATION | SACRAMENTO | CA | DIAGNOSTIC RADIOLOGY | 2420 | 9,503 | 9.0% | (916) 681-8852 |
| 4 | COASTAL RADIATION ONCOLOGY MEDICAL GROUP, INC. | SALINAS | CA | RADIATION ONCOLOGY | 11 | 6,838 | 6.5% | (831) 758-2724 |
| 5 | PARAGON CHICO MEDICAL GROUP INC | CHICO | CA | RADIATION ONCOLOGY | 10 | 6,799 | 6.5% | (530) 691-5920 |
| 6 | SANSUM CLINIC | SANTA BARBARA | CA | INTERNAL MEDICINE | 322 | 4,538 | 4.3% | (805) 681-7500 |
| 7 | VALLEY TUMOR MEDICAL GROUP A MEDICAL CORPORATION | PALMDALE | CA | HEMATOLOGY/ONCOLOGY | 4 | 3,218 | 3.1% | (661) 208-4790 |
| 8 | SCRIPPS HEALTH | LA JOLLA | CA | PHYSICIAN ASSISTANT | 1431 | 3,213 | 3.0% | (858) 455-9100 |
| 9 | RAVI PATEL M D INC | BAKERSFIELD | CA | HEMATOLOGY/ONCOLOGY | 20 | 2,899 | 2.8% | (661) 322-2206 |
| 10 | CALIFORNIA CANCER ASSOCIATES FOR RESEARCH AND EXCELLENCE INC | FRESNO | CA | HEMATOLOGY/ONCOLOGY | 62 | 2,825 | 2.7% | (559) 326-1222 |
| 11 | CEDARS-SINAI MEDICAL CARE FOUNDATION | LOS ANGELES | CA | PHYSICIAN ASSISTANT | 1699 | 2,624 | 2.5% | (310) 423-0674 |
| 12 | GOLDEN GATE UROLOGY INC | SAN FRANCISCO | CA | UROLOGY | 12 | 2,446 | 2.3% | (415) 922-3255 |
| 13 | CANCER THERAPY MEDICAL GROUP INC | FRESNO | CA | RADIATION ONCOLOGY | 13 | 2,410 | 2.3% | (559) 437-1000 |
| 14 | EPIC CARE | PLEASANT HILL | CA | HEMATOLOGY/ONCOLOGY | 54 | 1,897 | 1.8% | (925) 687-2570 |
| 15 | EL PORTAL RADIATION ONCOLOGY CENTER | MERCED | CA | DIAGNOSTIC RADIOLOGY | 4 | 1,719 | 1.6% | (209) 726-3410 |
| 16 | GOLDEN STATE RADIATION ONCOLOGY, INC. | WOODLAND HILLS | CA | RADIATION ONCOLOGY | 2 | 1,637 | 1.6% | (818) 449-2700 |
| 17 | STANFORD HEALTH CARE | STANFORD | CA | DIAGNOSTIC RADIOLOGY | 3039 | 1,561 | 1.5% | (650) 723-4000 |
| 18 | VENTURA COUNTY RADIATION ONCOLOGY MEDICAL GROUP, INC. | CAMARILLO | CA | RADIATION ONCOLOGY | 2 | 1,268 | 1.2% | (805) 484-1919 |
| 19 | RADIATION ONCOLOGY NETWORK OF SOUTHERN CALIFORNIA | CHULA VISTA | CA | RADIATION ONCOLOGY | 5 | 1,175 | 1.1% | (619) 502-7730 |
| 20 | GENESIS HEALTHCARE PARTNERS PC | TORRANCE | CA | GASTROENTEROLOGY | 211 | 1,118 | 1.1% | (310) 534-8400 |
| 21 | KENNETH M TOKITA MD INC | IRVINE | CA | DIAGNOSTIC RADIOLOGY | 2 | 1,070 | 1.0% | (949) 417-1100 |
| 22 | PROVIDENCE MEDICAL FOUNDATION | FULLERTON | CA | PHYSICIAN ASSISTANT | 1455 | 1,065 | 1.0% | (714) 871-3006 |
| 23 | J ROBERT WEST MD INC | LAS VEGAS | CA | DERMATOLOGY | 140 | 1,017 | 1.0% | (702) 258-1001 |
| 24 | MOJAVE RADIATION ONCOLOGY MEDICAL GROUP INC | APPLE VALLEY | CA | RADIATION ONCOLOGY | 2 | 986 | 0.9% | (760) 242-9999 |
| 25 | SALINAS VALLEY UROLOGY ASSOCIATES | SALINAS | CA | RADIATION ONCOLOGY | 2 | 969 | 0.9% | (831) 757-3006 |
| 26 | DIGNITY HEALTH MEDICAL FOUNDATION | FOLSOM | CA | DIAGNOSTIC RADIOLOGY | 1197 | 941 | 0.9% | (916) 983-7476 |
| 27 | INTERVENTIONAL RADIATION ONCOLOGY OF CALIFORNIA INC | APPLE VALLEY | CA | MEDICAL ONCOLOGY | 8 | 897 | 0.9% | (650) 485-9882 |
| 28 | ALBERT C MAK MD INC | ALHAMBRA | CA | RADIATION ONCOLOGY | 2 | 751 | 0.7% | (626) 227-2777 |
| 29 | THE REGENTS OF THE UNIVERSITY OF CALIFORNIA | LOS ANGELES | CA | RADIATION ONCOLOGY | 31 | 682 | 0.6% | (310) 825-9304 |
| 30 | MORTEZA DOWLATSHAHI M D INC | SAN JOSE | CA | RADIATION ONCOLOGY | 2 | 648 | 0.6% | (408) 729-4673 |
| 31 | CHAD SILA M D A PROFESSIONAL CORPORATION | LAWNDALE | CA | RADIATION ONCOLOGY | 6 | 626 | 0.6% | (310) 978-4970 |
| 32 | BASS MEDICAL GROUP | WALNUT CREEK | CA | OTOLARYNGOLOGY | 318 | 625 | 0.6% | — |
| 33 | UNIVERSITY OF PITTSBURGH CANCER INSTITUTE CANCER SERVICES | PITTSBURGH | CA | RADIATION ONCOLOGY | 57 | 492 | 0.5% | (412) 623-6720 |
| 34 | BEVERLY HILLS ONCOLOGY MEDICAL GROUP INC | BEVERLY HILLS | CA | RADIATION ONCOLOGY | 8 | 369 | 0.4% | (310) 432-8999 |
| 35 | UC REGENTS DEPARTMENT OF RADIATION ONCOLOGY | ORANGE | CA | RADIATION ONCOLOGY | 17 | 356 | 0.3% | (714) 456-5508 |
| 36 | RADIANT ONCOLOGY MEDICAL GROUP | PALM DESERT | CA | RADIATION ONCOLOGY | 2 | 284 | 0.3% | (760) 200-8777 |
| 37 | EMANATE HEALTH MEDICAL CARE FOUNDATION | WEST COVINA | CA | FAMILY PRACTICE | 81 | 168 | 0.2% | (626) 732-8391 |
| 38 | GLENDALE ADVENTIST MEDICAL CENTER | GLENDALE | CA | ANESTHESIOLOGY | 100 | 134 | 0.1% | (818) 863-4099 |
*Share of California's disclosed Medicare-FFS services for G6015, counted once per clinician. Volume is placed in the state it was billed from, so this page ranks the groups actually billing G6015 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 →