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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. Rachel Knopoff, M.D.
Torrance, CA · $147 in drug and device payments (2025) · (310) 517-4675
Dr. Rajeev Varma, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2809
Dr. Randal Sutherland, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 303-5750
Dr. Richard Krauthamer, M.D.
Torrance, CA · $224 in drug and device payments (2025) · (310) 517-4675
Dr. Richard Loi
Torrance, CA · No drug or device payments recorded (2025) · (424) 306-8070
Dr. Richard Renslo, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-5163
Dr. Richard Sullivan, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 303-5750
Dr. Ricky Kim, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2847
Dr. Robert Kolanz, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 303-5750
Dr. Robert Marcus, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 543-6929
Dr. Robert Simon, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2808
Dr. Robert Sostrin, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 373-0000
Dr. Russell Dickerson, M.D.
Torrance, CA · $165 in drug and device payments (2025) · (310) 517-4675
Dr. Shelby Lundahl, M.D.
Torrance, CA · $1,390 in drug and device payments (2025) · (310) 303-5750
Dr. Steven Ngai, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2847
Dr. Sung Kim, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 301-6800
Dr. Syrone Liu, MD
Torrance, CA · $21 in drug and device payments (2025) · (310) 222-2831
Dr. Taylor Parnall, MD
Torrance, CA · No drug or device payments recorded (2025) · (505) 319-8936
Dr. Trisha Kim, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2847
Dr. Vishtasb Ariazand, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2345
Dr. Chull Song, MD
Tracy, CA · No drug or device payments recorded (2025) · (209) 342-2300
Dr. Garth Harley, MD
Tracy, CA · No drug or device payments recorded (2025) · (209) 342-2300
Dr. Joseph Marshall, M.D.
Tracy, CA · No drug or device payments recorded (2025) · (209) 833-2393
Dr. Keith Kwok, M.D.
Tracy, CA · $907 in drug and device payments (2025) · (209) 833-2393
Dr. Kyle Yu, MD
Tracy, CA · No drug or device payments recorded (2025) · (209) 342-2300
Dr. Mario Sattah, MD
Tracy, CA · No drug or device payments recorded (2025) · (209) 833-2393
Dr. Richard Porzio, MD
Tracy, CA · No drug or device payments recorded (2025) · (209) 342-2300
Dr. Robert Lim, M.D.
Tracy, CA · No drug or device payments recorded (2025) · (209) 833-2393
Dr. Sam Kokoris, MD
Tracy, CA · No drug or device payments recorded (2025) · (209) 342-2300
Dr. Saral Verma, MD
Tracy, CA · No drug or device payments recorded (2025) · (209) 830-2115
Dr. Adrianne Thompson, M.D.
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-7182
Dr. Alexander Sturrock, M.D.
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-3000
Dr. Alexander Wilson, DO
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-7208
Dr. Claire Widule, MD
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-7205
Dr. James Gullo, M.D.
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-3545
Dr. James Odone
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-7182
Dr. James Walroth, M.D.
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-7223
Dr. Luke Simonet, M.D.
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-7205
Dr. Michael Tall, M.D.
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-7182
Dr. Prajeet Kaza, MD
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-7208
Dr. Robert Jesinger, M.D.
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-7182
Dr. Robin Yip, MD
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-7223
Dr. Stephen Bepko, M.D.
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-7273
Dr. Steven Lewis, MD
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-7213
Dr. Teddy Su, MD
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-7181
Dr. Theodore Jerdee, M.D.
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-7182
Dr. Tirzah Wait, MD
Travis Afb, CA · No drug or device payments recorded (2025) · (707) 423-7208
Dr. Myron Kamenetsky, M.D.
Truckee, CA · No drug or device payments recorded (2025) · (530) 582-3426
Dr. Frank Macaluso, M.D.
Tulare, CA · No drug or device payments recorded (2025) · (209) 577-9900
Dr. Harvey Eisenberg, M.D.
Tustin, CA · No drug or device payments recorded (2025) · (949) 717-4500

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.