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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. Kavita Mamtora, MD
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 571-4000
Dr. Kristen Smith
Santa Rosa, CA · No drug or device payments recorded (2025) · (865) 604-7789
Dr. Linda Casey, MD
Santa Rosa, CA · $19 in drug and device payments (2025) · (707) 521-4480
Dr. Mark Dowling, M.D.
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 576-4489
Dr. Mark Popovich, M.D.
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 521-4480
Dr. Michael Shane, M.D.
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 546-4062
Dr. Michael Williams, M.D.
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 546-4062
Dr. Mitesh Patel, M.D.
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 546-4062
Dr. Nicholas Kujala, M.D.
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 521-4480
Dr. Priyanka Kadaba, MD
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 521-4480
Dr. Robert Feiwell, M.D.
Santa Rosa, CA · $84 in drug and device payments (2025) · (707) 546-4062
Dr. Sarah Stassi, MD
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 521-4480
Dr. Scott Booth, M.D.
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 546-4062
Dr. Shawn Daly, MD
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 546-4062
Dr. Shirley Beshany, MD
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 579-9127
Dr. Stephanie Mccann, M.D.
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 653-3822
Dr. Stephen Eisenberg, MD
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 571-4000
Dr. Steven Rockoff, M.D.
Santa Rosa, CA · $19 in drug and device payments (2025) · (707) 521-4480
Dr. Titus Koenig, MD
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 571-4000
Dr. Wolfgang Bley, MD
Santa Rosa, CA · No drug or device payments recorded (2025) · (707) 571-4000
Dr. Ingo Rencken, M.D.
Sebastopol, CA · No drug or device payments recorded (2025) · (707) 829-4360
Dr. Robert Clark, M.D.
Selma, CA · No drug or device payments recorded (2025) · (559) 891-6337
Dr. Brian Nadav, M.D.
Sherman Oaks, CA · $39 in drug and device payments (2025) · (714) 476-3801
Dr. David Ritchie, M.D.
Sherman Oaks, CA · No drug or device payments recorded (2025) · (747) 208-8988
Dr. Kamran Koochek, M.D.
Sherman Oaks, CA · No drug or device payments recorded (2025) · (818) 986-4211
Dr. Lawrence Resnick, M.D.
Sherman Oaks, CA · No drug or device payments recorded (2025) · (818) 528-3466
Dr. James Peterson, D.O.
Sierra Madre, CA · No drug or device payments recorded (2025) · (415) 793-3269
Dr. Kay Yan, M.D.
Signal Hill, CA · No drug or device payments recorded (2025) · (562) 216-5120
Dr. Mario Giudici, MD
Signal Hill, CA · No drug or device payments recorded (2025) · (562) 912-2507
Dr. Craig Inouye, M.D.
Simi Valley, CA · No drug or device payments recorded (2025) · (805) 527-2462
Dr. Daniel Kim, M.D.
Simi Valley, CA · No drug or device payments recorded (2025) · (805) 527-2462
Dr. Gerald Goldstein, M.D.
Simi Valley, CA · No drug or device payments recorded (2025) · (805) 577-2179
Dr. Robert Acquarelli, M.D.
Simi Valley, CA · No drug or device payments recorded (2025) · (805) 955-6360
Dr. Leonard Holmgren, MD
S Lake Tahoe, CA · No drug or device payments recorded (2025) · (530) 543-5850
Dr. Joseph Dziubinski, MD
Solana Beach, CA · No drug or device payments recorded (2025) · (858) 442-2474
Dr. Daryl Chinn, M.D.
Sonoma, CA · No drug or device payments recorded (2025) · (707) 935-5235
Dr. James Rohn, MD
Sonora, CA · No drug or device payments recorded (2025) · (209) 342-2300
Dr. James Wilson, MD
Sonora, CA · No drug or device payments recorded (2025) · (209) 342-2300
Dr. Steven Hall, MD
Sonora, CA · No drug or device payments recorded (2025) · (209) 342-2300
Dr. Ali Hosseini Rivandi, MD
South Gate, CA · No drug or device payments recorded (2025) · (323) 442-8541
Dr. Howard Friedman, M.D.
South Lake Tahoe, CA · No drug or device payments recorded (2025) · (530) 541-3910
Dr. Paul Knight, MD
South Lake Tahoe, CA · No drug or device payments recorded (2025) · (530) 543-5820
Dr. Robert Silk, M.D.
South Lake Tahoe, CA · No drug or device payments recorded (2025) · (530) 543-5820
Dr. Amita Bhandari, MD
South San Francisco, CA · No drug or device payments recorded (2025) · (650) 742-2000
Dr. David Klein, MD
South San Francisco, CA · No drug or device payments recorded (2025) · (650) 742-2000
Dr. Gloria Chang, MD
South San Francisco, CA · No drug or device payments recorded (2025) · (650) 742-2000
Dr. Haicheng Yu, MD
South San Francisco, CA · No drug or device payments recorded (2025) · (650) 742-2000
Dr. Michael Duh, MD
South San Francisco, CA · No drug or device payments recorded (2025) · (650) 742-2000
Dr. Pierson Chiou, M.D.
South San Francisco, CA · No drug or device payments recorded (2025) · (650) 742-3882
Dr. Rose Liu, M.D.
South San Francisco, CA · No drug or device payments recorded (2025) · (650) 872-1451

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.