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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. Kenneth Averill, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 476-7711
Dr. Kevin Mchugh, M.D.
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 476-7712
Dr. Leping Pu, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 476-7711
Dr. Louis Zwerling
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 426-4866
Dr. Margaret Hansen, MD
Santa Cruz, CA · $457 in drug and device payments (2025) · (831) 458-5521
Dr. Mark Schmetz, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 476-7711
Dr. Melissa Gerlach, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 458-5521
Dr. Monica Harish, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 458-5521
Dr. Neal Swanson, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 476-7711
Dr. Nicholas Astromoff, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 476-7711
Dr. Nicholas Rudnick, M.D.
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 476-7711
Dr. Peter Shen, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 423-4111
Dr. Richard Peterson, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 476-1542
Dr. Richard Williams, MD
Santa Cruz, CA · $149 in drug and device payments (2025) · (831) 476-7711
Dr. Roy Martinez, M.D.
Santa Cruz, CA · $100 in drug and device payments (2025) · (831) 476-7711
Dr. Thomas Nguyen, M.D.
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 458-5521
Dr. Timothy Washowich, M.D.
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 458-5521
Dr. William Berg, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 458-5521
Dr. Brent Beahm, MD
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 434-4989
Dr. Richard Siegel, MD
Santa Maria, CA · No drug or device payments recorded (2025) · (508) 434-4989
Dr. Alan Shan
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 301-6800
Dr. Alberto Saucedo, M.D.
Santa Monica, CA · $18 in drug and device payments (2025) · (310) 829-9788
Dr. Alex Freitas, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 315-1000
Dr. Amir Mikhchi
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 315-1000
Dr. Amir Talebi Liasi, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 315-1000
Dr. Andrew Thierry, MD
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 740-6544
Dr. Anil Wadhwani, MD
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 264-9000
Dr. Anne Hoyt, MD
Santa Monica, CA · $72 in drug and device payments (2025) · (310) 393-5153
Dr. Benjamin Lesar, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 315-1000
Dr. Bruce Yawitz, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 264-9000
Dr. Curtis Hammerman, MD
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 315-1000
Dr. Dalia Artal, M.D.
Santa Monica, CA · $17 in drug and device payments (2025) · (310) 315-1000
Dr. Daniel Kirsch, MD
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 264-9000
Dr. David Tran, M.D.
Santa Monica, CA · $1,599 in drug and device payments (2025) · (310) 264-9000
Dr. Debra Mund, M.D.
Santa Monica, CA · $34 in drug and device payments (2025) · (310) 264-9000
Dr. Earl Landau, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 829-3130
Dr. Edward Zaragoza, MD
Santa Monica, CA · $328 in drug and device payments (2025) · (424) 259-8718
Dr. Erik Bekkers, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 315-1000
Dr. Farhad Keliddari, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (952) 595-1100
Dr. Francis Crnkovich, MD
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 315-1000
Dr. Gerald Roth, MD
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 264-9000
Dr. Ian Matsuura, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (952) 595-1100
Dr. Ira Smalberg, MD
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 264-9000
Dr. Jack Berman, MD
Santa Monica, CA · $15 in drug and device payments (2025) · (310) 315-1000
Dr. Jane Dascalos, MD
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 301-6800
Dr. Jeffrey Rappleye, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 315-1000
Dr. John Uszler, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 264-0080
Dr. Joseph Lebovic, MD
Santa Monica, CA · $21 in drug and device payments (2025) · (310) 394-2761
Dr. Joshua Friedlander, M.D.
Santa Monica, CA · $28 in drug and device payments (2025) · (310) 315-1000
Dr. Kevin Drake, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 315-1000

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.