State Specialty Directory

Radiation Oncology in CA

Federal CMS data for 927 radiation oncology providers across CA. Includes Medicare utilization, Open Payments industry funding, and PECOS enrollment status.

927
Providers
Median industry payments
$412
927
Radiation Oncology Providers
in CA
$412
Median Industry Payments
per provider (2018–2024)
3,871
Median Medicare Services
fee-for-service claims
How to read this directory: Providers are listed by Medicare service volume, which reflects only Medicare fee-for-service patients (typically 65+). This does not represent total practice volume. Industry payments span multiple years and payment types — they are legal and do not indicate wrongdoing. Radiation Oncology includes multiple subspecialties with different practice patterns. Learn more →
Showing top 50 of 927 providers, ranked by Medicare service volume. Search by city to narrow results.

Radiation Oncology Providers — CA

NPPES · Open Payments · Medicare
Provider City Medicare Volume Beneficiaries* Top Procedure Industry Payments Payment Type Coverage
ATTOUN, ADAM D.O. Redding 151,153 9,604 Contrast dye for imaging (iodine-based) $29 (2022-2022) Food & Beverage (100%) Very High
PRINCENTHAL, ROBERT MD Thousand Oaks 119,996 2,110 MRI contrast dye injection (gadoterate) $2,384 (2018-2024) Travel (50%) Very High
CHANG, JERRY M.D. Rancho Mirage 115,429 3,516 Contrast dye for imaging (iodine-based) $2,936 (2018-2024) Travel (64%) Very High
COHEN, MARTIN M.D. West Hills 112,139 2,226 MRI contrast dye injection (gadoterate) $531 (2018-2023) Food & Beverage (89%) Very High
BASSE, MICHAEL M.D. Salinas 90,446 15,254 Contrast dye for imaging (iodine-based) $269 (2018-2024) Food & Beverage (100%) Very High
SALAMON, NORIKO MD Los Angeles 77,369 3,435 MRI contrast dye injection (gadobutrol) $29,140 (2018-2024) Travel (85%) Very High
BONK, ROY M.D. Sacramento 76,542 3,107 MRI contrast dye injection (gadobutrol) $126 (2019-2020) Food & Beverage (100%) Very High
MANKARIOUS, MAIKEL M.D./M.B.A. Santa Monica 72,715 2,460 MRI contrast dye injection (gadoterate) $312 (2018-2023) Food & Beverage (100%) Very High
SCHWARTZBERG, ROSS M.D. San Diego 72,076 3,565 MRI contrast dye injection (gadobutrol) $129 (2022-2024) Food & Beverage (100%) Very High
GERO, BERNARD M.D. Santa Monica 67,284 3,962 MRI contrast dye injection (gadoterate) $93 (2018-2019) Food & Beverage (72%) Very High
NGUYEN, JOSEPHINE MD Rancho Mirage 64,370 7,400 MRI contrast dye injection (gadobutrol) $15 (2020-2022) Food & Beverage (82%) Very High
JAVERI, KHALID M.D. Santa Monica 62,400 2,030 Contrast dye for imaging (iodine-based) $26 (2022-2022) Food & Beverage (100%) Very High
LIPSON, SCOTT MD Walnut Creek 60,065 2,936 MRI contrast dye injection (gadobutrol) $532 (2018-2023) Food & Beverage (100%) Very High
GUNBERG, STEVEN D.O. Indio 58,886 2,163 MRI contrast dye injection (gadobutrol) $1,401 (2018-2024) Food & Beverage (100%) Very High
THOMAS, STEPHEN M.D. San Diego 58,428 1,984 Contrast dye for imaging (iodine-based) $2,519 (2018-2023) Consulting (54%) Very High
QUAZI, ROBIN M.D. Los Angeles 57,990 2,713 MRI contrast dye injection (gadoterate) $1,166 (2018-2024) Food & Beverage (96%) Very High
FLAGG, ERIC M.D. Burlingame 56,251 5,861 Contrast dye for imaging (iodine-based) $22,544 (2019-2024) Consulting (84%) Very High
MEHTA, PAREEN M.D. Los Angeles 54,493 3,281 Contrast dye for imaging (iodine-based) $36,772 (2018-2024) Consulting (57%) Very High
RAM, SUNIL MD Santa Monica 54,143 2,306 MRI contrast dye injection (gadoterate) $1,738 (2021-2024) Consulting (89%) Very High
RUEHM, STEFAN MD Los Angeles 53,391 1,438 Contrast dye for imaging (iodine-based) $781 (2018-2024) Food & Beverage (100%) Very High
WEINGARTEN, KARL MD Riverside 52,913 2,261 Contrast dye for imaging (iodine-based) $1,637 (2018-2024) Food & Beverage (100%) Very High
EILENBERG, STEVEN M.D. La Jolla 52,580 2,143 MRI contrast dye injection (gadoterate) $464 (2018-2024) Food & Beverage (100%) Very High
BRUNENGRABER, DANIEL M.D. Lancaster 50,927 3,190 Contrast dye for imaging (iodine-based) $676 (2018-2022) Food & Beverage (100%) Very High
GOODMAN, ERIC M.D. San Diego 50,098 2,207 Contrast dye for imaging (iodine-based) $1,103 (2018-2024) Food & Beverage (100%) Very High
GABRIEL, SIMON M.D. Los Angeles 50,012 3,825 Contrast dye for imaging (iodine-based) $1,329 (2018-2022) Travel (70%) Very High
COORDS, MICHAEL MD Beverly Hills 49,869 1,928 Contrast dye for imaging (iodine-based) $1,088 (2018-2024) Food & Beverage (100%) Very High
BEDAYAT, ARASH M.D. Los Angeles 49,282 2,144 Contrast dye for imaging (iodine-based) $562 (2021-2024) Food & Beverage (100%) Very High
LEDBETTER, LUKE M.D. Duarte 48,455 1,759 MRI contrast dye injection (gadobutrol) $762 (2021-2024) Food & Beverage (100%) Very High
HANELIN, JOSHUA M.D. Valencia 44,117 4,643 MRI contrast dye injection (gadobutrol) $505 (2018-2023) Food & Beverage (100%) Very High
SYMKO, SOPHIA MD Santa Monica 43,515 1,707 MRI contrast dye injection (gadoterate) $1,337 (2018-2018) Travel (60%) Very High
RAMAN, STEVEN MD Los Angeles 43,390 1,981 MRI contrast dye injection (gadobutrol) $212,729 (2018-2024) Consulting (76%) Very High
KING, KEVIN M.D. Los Angeles 42,480 2,246 MRI contrast dye injection (gadobutrol) $2,116 (2018-2023) Consulting (90%) Very High
BAILEY, JASON San Francisco 42,281 3,404 Contrast dye for imaging (iodine-based) $93 (2023-2024) Food & Beverage (100%) Very High
AURAN, TIMOTHY M.D. San Diego 42,207 5,044 Contrast dye for imaging (iodine-based) $2,868 (2018-2024) Food & Beverage (68%) Very High
GORDON, RACHAEL M.D. Beverly Hills 42,037 3,470 MRI contrast dye injection (gadobutrol) $153 (2018-2023) Food & Beverage (100%) Very High
WESBEY, GEORGE M.D. La Jolla 41,960 2,499 Contrast dye for imaging (iodine-based) $251 (2018-2024) Food & Beverage (100%) Very High
MASAMED, RINAT MD Los Angeles 41,545 1,719 Contrast dye for imaging (iodine-based) $11,409 (2018-2023) Travel (95%) Very High
CHEN, LINH MD Glendale 40,962 8,573 Contrast dye for imaging (iodine-based) $179,381 (2022-2024) Royalty/License (100%) Very High
HOLTZMAN, STEPHEN MD Templeton 40,429 6,767 Contrast dye for imaging (iodine-based) $2,332 (2018-2024) Food & Beverage (100%) Very High
TAHER, MUFFADAL M.D. Rancho Mirage 39,685 5,514 MRI contrast dye injection (gadobutrol) $12 (2018-2018) Food & Beverage (100%) Very High
SCHILLER, VICKI M.D. Santa Monica 39,467 4,241 MRI contrast dye injection (gadobutrol) $700 (2018-2024) Honoraria (57%) Very High
ZISSEN, MAURICE M.D. La Jolla 39,411 2,118 MRI contrast dye injection (gadoterate) $28,068 (2018-2024) Consulting (99%) Very High
PATEL, MAITRAYA M.D. Los Angeles 39,400 1,833 Contrast dye for imaging (iodine-based) $977 (2018-2023) Food & Beverage (100%) Very High
ABRAMS, JOSEPH M.D. San Diego 38,090 5,045 MRI contrast dye injection (gadoterate) $336 (2020-2024) Food & Beverage (100%) Very High
ROTH, GERALD MD Santa Monica 37,926 5,219 Contrast dye for imaging (iodine-based) $259 (2018-2023) Food & Beverage (100%) Very High
HOURIANI, FARHAD M.D. North Hollywood 36,676 2,187 Contrast dye for imaging (iodine-based) $58 (2022-2023) Food & Beverage (100%) Very High
LU, DAVID MD Los Angeles 36,101 1,494 MRI contrast dye injection (gadobutrol) $166,983 (2018-2024) Consulting (99%) Very High
KIM, CHRISTINE M.D. Stanford 36,033 1,456 MRI contrast dye injection (gadobutrol) $207 (2019-2024) Food & Beverage (100%) Very High
KADELL, BARBARA MD Los Angeles 35,544 968 Contrast dye for imaging (iodine-based) $1,103 (2018-2022) Food & Beverage (100%) Very High
TRAN, DAVID M.D. Santa Monica 35,345 2,666 Contrast dye for imaging (iodine-based) $5,785 (2018-2024) Food & Beverage (46%) Very High
Note: Radiation Oncology encompasses multiple subspecialties with different practice patterns. Differences in payment amounts and procedure volumes may reflect subspecialty focus rather than practice quality. Consider viewing individual profiles for full context.
Data Disclaimer — Data sourced from the Centers for Medicare & Medicaid Services (CMS): National Plan and Provider Enumeration System (NPPES), Open Payments program, Medicare Provider Utilization and Payment Data, and Provider Enrollment & Certification data (PECOS). Published under the Freedom of Information Act (FOIA). This website is not affiliated with, endorsed by, or authorized by CMS, HHS, or the U.S. Government. Data may contain errors as reported to CMS by providers and reporting entities. Payments from industry are legal and do not indicate wrongdoing. Medicare data reflects only patients aged 65+ or those with qualifying disabilities. For corrections, contact CMS directly. This information does not constitute medical advice and should not be used as the sole basis for choosing a healthcare provider. Procedure descriptions use plain language and do not reference CPT® codes, which are copyrighted by the American Medical Association. Full methodology → · Report a data error → · Privacy policy →