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)
4,217
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; disclosure alone establishes neither wrongdoing nor legality.
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 | 153,777 | — | Contrast dye for imaging (iodine-based) | $29 (2022-2022) | — | Very High |
| PRINCENTHAL, ROBERT MD | Thousand Oaks | 119,996 | — | MRI contrast dye injection (gadoterate) | $2,384 (2018-2024) | — | Very High |
| CHANG, JERRY M.D. | Rancho Mirage | 116,114 | — | Contrast dye for imaging (iodine-based) | $2,936 (2018-2024) | — | Very High |
| COHEN, MARTIN M.D. | West Hills | 112,139 | — | MRI contrast dye injection (gadoterate) | $531 (2018-2023) | — | Very High |
| BASSE, MICHAEL M.D. | Salinas | 102,973 | — | Contrast dye for imaging (iodine-based) | $269 (2018-2024) | — | Very High |
| SALAMON, NORIKO MD | Los Angeles | 79,241 | — | MRI contrast dye injection (gadobutrol) | $29,140 (2018-2024) | — | Very High |
| BONK, ROY M.D. | Sacramento | 77,564 | — | MRI contrast dye injection (gadobutrol) | $126 (2019-2020) | — | Very High |
| MANKARIOUS, MAIKEL M.D./M.B.A. | Santa Monica | 72,715 | — | MRI contrast dye injection (gadoterate) | $312 (2018-2023) | — | Very High |
| SCHWARTZBERG, ROSS M.D. | San Diego | 72,076 | — | MRI contrast dye injection (gadobutrol) | $129 (2022-2024) | — | Very High |
| GERO, BERNARD M.D. | Santa Monica | 67,284 | — | MRI contrast dye injection (gadoterate) | $93 (2018-2019) | — | Very High |
| NGUYEN, JOSEPHINE MD | Rancho Mirage | 66,962 | — | MRI contrast dye injection (gadobutrol) | $15 (2020-2022) | — | Very High |
| JAVERI, KHALID M.D. | Santa Monica | 62,400 | — | Contrast dye for imaging (iodine-based) | $26 (2022-2022) | — | Very High |
| LIPSON, SCOTT MD | Walnut Creek | 61,622 | — | MRI contrast dye injection (gadobutrol) | $532 (2018-2023) | — | Very High |
| QUAZI, ROBIN M.D. | Los Angeles | 59,200 | — | MRI contrast dye injection (gadoterate) | $1,166 (2018-2024) | — | Very High |
| GUNBERG, STEVEN D.O. | Indio | 58,886 | — | MRI contrast dye injection (gadobutrol) | $1,401 (2018-2024) | — | Very High |
| THOMAS, STEPHEN M.D. | San Diego | 58,428 | — | Contrast dye for imaging (iodine-based) | $2,519 (2018-2023) | — | Very High |
| FLAGG, ERIC M.D. | Burlingame | 56,524 | — | Contrast dye for imaging (iodine-based) | $22,544 (2019-2024) | — | Very High |
| MEHTA, PAREEN M.D. | Los Angeles | 54,493 | — | Contrast dye for imaging (iodine-based) | $36,772 (2018-2024) | — | Very High |
| RAM, SUNIL MD | Santa Monica | 54,143 | — | MRI contrast dye injection (gadoterate) | $1,738 (2021-2024) | — | Very High |
| RUEHM, STEFAN MD | Los Angeles | 53,796 | — | Contrast dye for imaging (iodine-based) | $781 (2018-2024) | — | Very High |
| WEINGARTEN, KARL MD | Riverside | 53,319 | — | Contrast dye for imaging (iodine-based) | $1,637 (2018-2024) | — | Very High |
| GABRIEL, SIMON M.D. | Los Angeles | 53,231 | — | Contrast dye for imaging (iodine-based) | $1,329 (2018-2022) | — | Very High |
| EILENBERG, STEVEN M.D. | La Jolla | 52,940 | — | MRI contrast dye injection (gadoterate) | $464 (2018-2024) | — | Very High |
| BRUNENGRABER, DANIEL M.D. | Lancaster | 52,407 | — | Contrast dye for imaging (iodine-based) | $676 (2018-2022) | — | Very High |
| BEDAYAT, ARASH M.D. | Los Angeles | 50,150 | — | Contrast dye for imaging (iodine-based) | $562 (2021-2024) | — | Very High |
| GOODMAN, ERIC M.D. | San Diego | 50,098 | — | Contrast dye for imaging (iodine-based) | $1,103 (2018-2024) | — | Very High |
| COORDS, MICHAEL MD | Beverly Hills | 49,869 | — | Contrast dye for imaging (iodine-based) | $1,088 (2018-2024) | — | Very High |
| LEDBETTER, LUKE M.D. | Duarte | 49,037 | — | MRI contrast dye injection (gadobutrol) | $762 (2021-2024) | — | Very High |
| CHEN, LINH MD | Glendale | 47,526 | — | Contrast dye for imaging (iodine-based) | $179,381 (2022-2024) | — | Very High |
| HANELIN, JOSHUA M.D. | Valencia | 45,358 | — | MRI contrast dye injection (gadobutrol) | $505 (2018-2023) | — | Very High |
| HOLTZMAN, STEPHEN MD | Templeton | 44,324 | — | Contrast dye for imaging (iodine-based) | $2,332 (2018-2024) | — | Very High |
| AURAN, TIMOTHY M.D. | San Diego | 44,088 | — | Contrast dye for imaging (iodine-based) | $2,868 (2018-2024) | — | Very High |
| WESBEY, GEORGE M.D. | La Jolla | 43,898 | — | Contrast dye for imaging (iodine-based) | $251 (2018-2024) | — | Very High |
| BAILEY, JASON | San Francisco | 43,661 | — | Contrast dye for imaging (iodine-based) | $93 (2023-2024) | — | Very High |
| RAMAN, STEVEN MD | Los Angeles | 43,632 | — | MRI contrast dye injection (gadobutrol) | $212,729 (2018-2024) | — | Very High |
| SYMKO, SOPHIA MD | Santa Monica | 43,515 | — | MRI contrast dye injection (gadoterate) | $1,337 (2018-2018) | — | Very High |
| KING, KEVIN M.D. | Los Angeles | 43,329 | — | MRI contrast dye injection (gadobutrol) | $2,116 (2018-2023) | — | Very High |
| MASAMED, RINAT MD | Los Angeles | 42,681 | — | Contrast dye for imaging (iodine-based) | $11,409 (2018-2023) | — | Very High |
| TAHER, MUFFADAL M.D. | Rancho Mirage | 42,323 | — | MRI contrast dye injection (gadobutrol) | $12 (2018-2018) | — | Very High |
| GORDON, RACHAEL M.D. | Beverly Hills | 42,037 | — | MRI contrast dye injection (gadobutrol) | $153 (2018-2023) | — | Very High |
| ZISSEN, MAURICE M.D. | La Jolla | 41,347 | — | MRI contrast dye injection (gadoterate) | $28,068 (2018-2024) | — | Very High |
| SCHILLER, VICKI M.D. | Santa Monica | 40,954 | — | MRI contrast dye injection (gadobutrol) | $700 (2018-2024) | — | Very High |
| PATEL, MAITRAYA M.D. | Los Angeles | 40,410 | — | Contrast dye for imaging (iodine-based) | $977 (2018-2023) | — | Very High |
| ABRAMS, JOSEPH M.D. | San Diego | 38,220 | — | MRI contrast dye injection (gadoterate) | $336 (2020-2024) | — | Very High |
| MEEKS, ADAM M.D. | San Francisco | 37,927 | — | Contrast dye for imaging (iodine-based) | $149 (2022-2024) | — | Very High |
| ROTH, GERALD MD | Santa Monica | 37,926 | — | Contrast dye for imaging (iodine-based) | $259 (2018-2023) | — | Very High |
| HOURIANI, FARHAD M.D. | North Hollywood | 36,676 | — | Contrast dye for imaging (iodine-based) | $58 (2022-2023) | — | Very High |
| KIM, CHRISTINE M.D. | Stanford | 36,613 | — | MRI contrast dye injection (gadobutrol) | $207 (2019-2024) | — | Very High |
| KADELL, BARBARA MD | Los Angeles | 36,592 | — | Contrast dye for imaging (iodine-based) | $1,103 (2018-2022) | — | Very High |
| CHOI, EUGENE MD | Los Angeles | 36,455 | — | Contrast dye for imaging (iodine-based) | $232 (2018-2023) | — | 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.