Diagnostic Radiologists in California
Data updated monthly · Last refresh October 2026
4,516 Diagnostic Radiology providers practice in California, including 50 (1%) offering telehealth. The largest concentration is in Los Angeles. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.
4,516providers
50telehealth
Los Angelestop city
Diagnostic Radiology by city in California
Choose a city to see providers there.
Diagnostic Radiology providers in California
Listed by city, largest first. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.
Dr. Jeffrey Black, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(925) 274-4950 Dr. Jeffrey Rueda, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Jody Balich, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 465-3998 Dr. Joe Pastrano, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 428-3000 Dr. John Downey, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. John Walton, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Juanito Villanueva, MDOakland, CA · No drug or device payments recorded (2025) ·
(925) 274-4950 Dr. Justin Siegal, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 428-3000 Dr. Krammie Chan, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Li Hsia Cheong, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1255 Dr. Lindsay Busby, M.D,Oakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Louise Truong, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Margaret Lynch, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Maria Dais, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Marianna Caponigro, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Matthew Nesper, MDOakland, CA · No drug or device payments recorded (2025) ·
(925) 274-4950 Dr. Michael Maiman, MDOakland, CA · No drug or device payments recorded (2025) ·
(925) 274-4950 Dr. Michael Martinucci, M.D. Dr. Michael Rizzo, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Nora Canty, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Patrick Perkins, MDOakland, CA · No drug or device payments recorded (2025) ·
(925) 274-4950 Dr. Philip Chyu, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(925) 274-4950 Dr. Rabinder Sandhu, MD, MPHOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Richard Keene, MDOakland, CA · No drug or device payments recorded (2025) ·
(925) 274-4950 Dr. Romy Ott, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 912-4961 Dr. Ronald Cohen, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 428-3410 Dr. Samuel Baronofsky, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Sandra Mun, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4208 Dr. Shenche Hshieh, M.D., PHARM.D., M.S.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 437-5039 Dr. Shilpa Kumbhani, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Stephen Chan, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Stephen Kahn, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(925) 274-4950 Dr. Stephen Wrenn, MDOakland, CA · $193 in drug and device payments (2025) ·
(510) 752-1000 Dr. Steven Hammerschlag, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(925) 274-4950 Dr. Stuart London, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 420-8800 Dr. Taylor Chung, M.D.Oakland, CA · $8,419 in drug and device payments (2025) ·
(510) 428-3415 Dr. T. Eric Drasin, M.D.Oakland, CA · $113 in drug and device payments (2025) · Telehealth ·
(925) 274-4950 Dr. Vaseem Iqbal, MDOakland, CA · No drug or device payments recorded (2025) ·
(216) 255-5728 Dr. Yuriria Lobato, MDOakland, CA · No drug or device payments recorded (2025) ·
(925) 274-4950 Dr. Eyal Ron, M.D.Oak Park, CA · No drug or device payments recorded (2025) ·
(818) 865-8535 Dr. Bruce Biederman, MDOceanside, CA · No drug or device payments recorded (2025) ·
(760) 940-4055 Dr. Emmaleigh Price, R.T.(R)Oceanside, CA · No drug or device payments recorded (2025) ·
(405) 588-3044 Dr. Grant Wallace, M.D.Oceanside, CA · $22 in drug and device payments (2025) ·
(760) 719-3479 Dr. Jeffrey Miller, M.D.Oceanside, CA · No drug or device payments recorded (2025) ·
(760) 940-4055 Dr. Kathryn Hartmann, M.D.Oceanside, CA · No drug or device payments recorded (2025) ·
(760) 719-3475 Dr. Kenric Aban, M.D.Oceanside, CA · No drug or device payments recorded (2025) ·
(760) 719-3205 Dr. Kiran Patel, M.D.Oceanside, CA · $718 in drug and device payments (2025) ·
(760) 547-8000 Dr. Nathan Copelan, M.D.Oceanside, CA · No drug or device payments recorded (2025) ·
(760) 940-4055 Dr. Ronald Willy, M.D.Oceanside, CA · No drug or device payments recorded (2025) ·
(765) 210-9556 Common questions
How many Diagnostic Radiology providers are in California?There are 4,516 Diagnostic Radiology providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Do Diagnostic Radiology providers in California offer telehealth?Yes. 50 of the 4,516 Diagnostic Radiology providers in California (about 1%) report offering telehealth services in CMS data.
Which cities in California have the most Diagnostic Radiology providers?Los Angeles (594), San Diego (377), San Francisco (335) have the highest concentration of Diagnostic Radiology providers in California.
How many Diagnostic Radiology providers in California received drug or device company payments?917 of 4,516 Diagnostic Radiology providers in California (20%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
Where does this data come from?Provider counts and profiles come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.
Do most Diagnostic Radiologists in California work in independent practices or large health systems?Among 2,842 Diagnostic Radiologists in California enrolled in Medicare, 6% bill through a solo or small practice with fewer than 10 clinicians, 16% through a mid-size group of 10 to 99, and 78% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Diagnostic Radiologists in California work at?According to CMS facility affiliation records, the California hospitals where the most Diagnostic Radiologists hold privileges are UCSF Medical Center in San Francisco; UC San Diego Health Hillcrest - Hillcrest Med Ctr in San Diego; Uci Health-Orange in Orange.
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