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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. Kristopher De Ga
Modesto, CA · No drug or device payments recorded (2025) · (916) 708-8038
Dr. Marek Rozycki, M.D.
Modesto, CA · No drug or device payments recorded (2025) · (209) 577-4444
Dr. Maria Berrones, MD
Modesto, CA · No drug or device payments recorded (2025) · (209) 557-1000
Dr. Mark Goldberg, MD
Modesto, CA · No drug or device payments recorded (2025) · (209) 491-5200
Dr. Matthew Lynn, M.D.
Modesto, CA · No drug or device payments recorded (2025) · (209) 577-4444
Dr. Matthew Ward, M.D.
Modesto, CA · No drug or device payments recorded (2025) · (209) 524-1211
Dr. Michael Dumars, M.D.
Modesto, CA · No drug or device payments recorded (2025) · (209) 491-5200
Dr. Michael Klieger, MD
Modesto, CA · No drug or device payments recorded (2025) · (209) 571-6622
Dr. Michael Tekautz, M.D.
Modesto, CA · No drug or device payments recorded (2025) · (209) 577-4444
Dr. Michael Zeppa, M.D.
Modesto, CA · No drug or device payments recorded (2025) · (209) 577-4444
Dr. Nadia Sultan, MD
Modesto, CA · No drug or device payments recorded (2025) · (209) 521-6097
Dr. Patricia Orlino, MD
Modesto, CA · No drug or device payments recorded (2025) · (209) 557-1000
Dr. Paul Ramirez, M.D.
Modesto, CA · No drug or device payments recorded (2025) · (209) 577-4444
Dr. Peter Loew, M.D.
Modesto, CA · No drug or device payments recorded (2025) · (209) 577-4444
Dr. Peter Triolo, M.D.
Modesto, CA · No drug or device payments recorded (2025) · (209) 524-1211
Dr. Qasim Barra, M.D.
Modesto, CA · No drug or device payments recorded (2025) · (209) 524-1211
Dr. Quoc-han Nguyen
Modesto, CA · No drug or device payments recorded (2025) · (209) 577-4444
Dr. Rafael Vargas, M.D.
Modesto, CA · No drug or device payments recorded (2025) · (209) 550-4755
Dr. Ravi Gangula, MD
Modesto, CA · No drug or device payments recorded (2025) · (209) 557-1000
Dr. Raymond Rieman, MD
Modesto, CA · No drug or device payments recorded (2025) · (209) 524-1211
Dr. Richard Haak, M.D.
Modesto, CA · $1,305 in drug and device payments (2025) · (209) 577-4444
Dr. Richard Kendrick, M.D,
Modesto, CA · No drug or device payments recorded (2025) · (209) 342-5920
Dr. R Jabola, MD
Modesto, CA · No drug or device payments recorded (2025) · (209) 524-1211
Dr. Robert Anderson, M.D.
Modesto, CA · No drug or device payments recorded (2025) · (209) 577-4444
Dr. Robert Fetz, M.D.
Modesto, CA · No drug or device payments recorded (2025) · (209) 577-4444
Dr. Roy Snable, M.D.
Modesto, CA · No drug or device payments recorded (2025) · (209) 524-1211
Dr. Scott Alexander, M.D.
Modesto, CA · $23 in drug and device payments (2025) · (209) 943-2041
Dr. Scott Smith, M.D.
Modesto, CA · No drug or device payments recorded (2025) · (209) 735-6250
Dr. Serge Djukic, MD
Modesto, CA · No drug or device payments recorded (2025) · (209) 222-7342
Dr. Steven Kotzbauer, MD
Modesto, CA · No drug or device payments recorded (2025) · (209) 557-1000
Dr. Thomas Rhodeman, M.D.
Modesto, CA · $171 in drug and device payments (2025) · (209) 577-4444
Dr. Tianlu Snook, M.D.
Modesto, CA · No drug or device payments recorded (2025) · (209) 524-1211
Dr. Wenji Jiang, MD
Modesto, CA · No drug or device payments recorded (2025) · (209) 557-1000
Dr. Wojciech Wierzbowski, MD
Modesto, CA · No drug or device payments recorded (2025) · (209) 524-1211
Dr. Yee-hsiang Wang, M.D.
Modesto, CA · $72 in drug and device payments (2025) · (209) 524-1211
Dr. Branden Garcia, M.D.
Monrovia, CA · $2,548 in drug and device payments (2025) · (626) 408-9800
Dr. Fady El-gabalawy, MD
Monrovia, CA · $1,256 in drug and device payments (2025) · (626) 408-9800
Dr. Hyoung Oh
Monrovia, CA · No drug or device payments recorded (2025) · (626) 408-9800
Dr. Vartan Vartanians, M.D.
Monrovia, CA · No drug or device payments recorded (2025) · (774) 062-9168
Dr. Camiar Ohadi, M.D
Montclair, CA · No drug or device payments recorded (2025) · (909) 625-2000
Dr. Michael Terk, MD
Montebello, CA · No drug or device payments recorded (2025) · (323) 838-6800
Dr. Sidney Friedman, M.D.
Montebello, CA · $15 in drug and device payments (2025) · (323) 725-5080
Dr. Andrew Schmidt, M.D.
Monterey, CA · No drug or device payments recorded (2025) · (831) 624-5311
Dr. Cary Yeh, M.D.
Monterey, CA · $21 in drug and device payments (2025) · (831) 624-5311
Dr. Daniel Braslau, MD
Monterey, CA · No drug or device payments recorded (2025) · (831) 656-9800
Dr. Daniel Hightower, M.D.
Monterey, CA · $359 in drug and device payments (2025) · (831) 624-5311
Dr. Joan Frisoli, M.D.
Monterey, CA · No drug or device payments recorded (2025) · (831) 624-5311
Dr. Kristine Leatherberry, M.D.
Monterey, CA · $99 in drug and device payments (2025) · (831) 624-5311
Dr. Robert Gardner, M.D.
Monterey, CA · $80 in drug and device payments (2025) · (831) 624-5311
Dr. Robert Wirtz, M.D.
Monterey, CA · No drug or device payments recorded (2025) · (831) 624-5311

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.

Related reading on HealthcareDiscovery.AI

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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.