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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 in Los Angeles594 providers
Diagnostic Radiology in San Diego377 providers
Diagnostic Radiology in San Francisco335 providers
Diagnostic Radiology in Stanford235 providers
Diagnostic Radiology in Sacramento233 providers
Diagnostic Radiology in Orange120 providers
Diagnostic Radiology in Walnut Creek99 providers
Diagnostic Radiology in Loma Linda74 providers
Diagnostic Radiology in Santa Barbara74 providers
Diagnostic Radiology in Palo Alto69 providers
Diagnostic Radiology in La Jolla69 providers
Diagnostic Radiology in San Jose69 providers
Diagnostic Radiology in Oakland68 providers
Diagnostic Radiology in Long Beach64 providers
Diagnostic Radiology in Torrance64 providers
Diagnostic Radiology in Modesto60 providers
Diagnostic Radiology in Fresno58 providers
Diagnostic Radiology in Santa Monica55 providers
Diagnostic Radiology in El Segundo50 providers
Diagnostic Radiology in West Hollywood45 providers
Diagnostic Radiology in Santa Rosa45 providers
Diagnostic Radiology in Newport Beach43 providers
Diagnostic Radiology in Bakersfield41 providers
Diagnostic Radiology in Beverly Hills37 providers

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. Stanford Schwimer, MD
Beverly Hills, CA · $118 in drug and device payments (2025) · (310) 859-8104
Dr. Stephen Fierstien, M.D.
Beverly Hills, CA · No drug or device payments recorded (2025) · (310) 550-5858
Dr. Steven Oglevie, M.D.
Beverly Hills, CA · No drug or device payments recorded (2025) · (949) 887-8304
Dr. John Kuipers, DO
Bishop, CA · No drug or device payments recorded (2025) · (760) 873-2623
Dr. Cecil Bowen, M.D.
Blythe, CA · No drug or device payments recorded (2025) · (760) 921-5196
Dr. Justin Weiss, MD
Bonsall, CA · No drug or device payments recorded (2025) · (520) 247-1547
Dr. Qui Jeff Vo, M.D.
Brawley, CA · No drug or device payments recorded (2025) · (760) 351-3501
Dr. Shahrouz Tahvilian, M.D.
Brawley, CA · $1,293 in drug and device payments (2025) · (760) 351-3288
Dr. Jed Santa Maria, M.D.
Brea, CA · $16 in drug and device payments (2025) · (952) 595-1100
Dr. Atulkumar Patel, M.D.
Buena Park, CA · No drug or device payments recorded (2025) · (714) 995-5400
Dr. Loren Cohen, M.D.
Buena Park, CA · No drug or device payments recorded (2025) · (714) 994-1595
Dr. Sim Hoffman, M.D.
Buena Park, CA · No drug or device payments recorded (2025) · (714) 995-5400
Dr. Alina Feldman, M.D.
Burbank, CA · No drug or device payments recorded (2025) · (818) 556-2700
Dr. Daniel Lee, MD
Burbank, CA · $1,424 in drug and device payments (2025) · (818) 847-6049
Dr. Edward Jahnke, M.D.
Burbank, CA · No drug or device payments recorded (2025) · (818) 847-6983
Dr. Jason Sinner, M.D.
Burbank, CA · $33 in drug and device payments (2025) · (818) 843-2835
Dr. Laurie Cleland, MD
Burbank, CA · $15 in drug and device payments (2025) · (818) 843-2835
Dr. Marc Lee, MD
Burbank, CA · No drug or device payments recorded (2025) · (818) 843-2835
Dr. Mohammad Dadsetan, MD
Burbank, CA · No drug or device payments recorded (2025) · (818) 843-1919
Dr. Norman Silverman, M.D.
Burbank, CA · No drug or device payments recorded (2025) · (208) 292-4322
Dr. Robert Cassling, M.D.
Burbank, CA · No drug or device payments recorded (2025) · (818) 843-2835
Dr. Samantha Phung, DO
Burbank, CA · No drug or device payments recorded (2025) · (818) 556-2700
Dr. Samuel Tokuyama, D.O.
Burbank, CA · No drug or device payments recorded (2025) · (818) 848-1945
Dr. Wendy Tien, M.D.
Burbank, CA · No drug or device payments recorded (2025) · (818) 843-2835
Dr. Andrew Chang, MD MS
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5509
Dr. Arthur Li, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5515
Dr. Brian Johnson, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5515
Dr. Christopher Yoo, M.D.
Burlingame, CA · $25 in drug and device payments (2025) · (650) 696-5515
Dr. David Marcus, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5515
Dr. Dorra Sellami, MD
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5515
Dr. Eric Flagg, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5515
Dr. Gregory Lim, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5515
Dr. Harrison Lee, MD
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5509
Dr. John Wilson, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5515
Dr. Joseph Knox, MD
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5509
Dr. Lenora Fung, MD
Burlingame, CA · No drug or device payments recorded (2025) · (415) 665-3046
Dr. Mark Pederson, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5515
Dr. Michael Holmes
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5515
Dr. Sera Kim, MD
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5509
Dr. Venkat Masarapu
Burlingame, CA · $27 in drug and device payments (2025) · (650) 696-5519
Dr. William Stephenson, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5515
Dr. Gilbert Onaka, M.D.
Camarillo, CA · No drug or device payments recorded (2025) · (805) 484-9346
Dr. Alison Bevan, M.D.
Cameron Park, CA · $80 in drug and device payments (2025) · (530) 672-1351
Dr. Angelique Olszowka, MD
Cam Pendleton, CA · No drug or device payments recorded (2025) · (760) 725-1330
Dr. Harold Nadel, M.D.
Camp Pendleton, CA · No drug or device payments recorded (2025) · (760) 725-3147
Dr. Samuel Tsang, MD
Camp Pendleton, CA · No drug or device payments recorded (2025) · (760) 719-4856
Dr. Wayne Murphy, M.D.
Camp Pendleton, CA · $541 in drug and device payments (2025) · (760) 719-3205
Dr. Gerald Levinson, M.D.
Capistrano Beach, CA · No drug or device payments recorded (2025) · (949) 496-1067
Dr. Michael Reardon, M.D.
Capitola, CA · No drug or device payments recorded (2025) · (408) 386-2398
Dr. Afsaneh Maghsoudy, M.D.
Carlsbad, CA · No drug or device payments recorded (2025) · (760) 730-3536

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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Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory. Are you a Diagnostic Radiology in California? Get featured.