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 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. Joseph Chan, M.D.Walnut Creek, CA · $18 in drug and device payments (2025) ·
(925) 296-7150 Dr. Joseph Mersol, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Katherine Fong, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Katherine Jue, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-5020 Dr. Keith Tao, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-1756 Dr. Keyvan Nouri, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Kimberly Blumberg, M.DWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Kirk So, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Kit Tittiranonda, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Less Chafen, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Lindsay Cheng, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Lloyd Gordon, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Mark Goldsmith, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Mark Tu, M.D.Walnut Creek, CA · $35 in drug and device payments (2025) ·
(925) 296-7150 Dr. Marsha Roberts, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7156 Dr. Molly Honegger, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7156 Dr. Norman MoscowWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Osamu Kaneko, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 393-6970 Dr. Patrick Ryan, MDWalnut Creek, CA · $15 in drug and device payments (2025) ·
(310) 619-5106 Dr. Philip Rich, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Ralph Mutchler, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Riaz Dhanani, MDWalnut Creek, CA · $195 in drug and device payments (2025) ·
(925) 296-7150 Dr. Richard Baxter, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Richard Sigel, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Richard Yu, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Robert BinderWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Robert Schick, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Robinson Yu, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Ronald Chan, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Royce Chrys, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Ruby Chang, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Samuel Choi, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7156 Dr. Sangeeta Gambhir, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Sapna Reddy, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Saurabh Patel, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Scott Lipson, MDWalnut Creek, CA · $771 in drug and device payments (2025) ·
(925) 296-7150 Dr. Shervine Shirazi, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Shlomo Leibowich, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Sidney Chan, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Siva RamanWalnut Creek, CA · No drug or device payments recorded (2025) ·
(410) 955-5173 Dr. Stephen Hesseltine, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Sung Kim, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Sunil Gandhi, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Susan Cha, M.D.Walnut Creek, CA · $14,115 in drug and device payments (2025) ·
(925) 296-7150 Dr. Susan FertigWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Tom Joseph, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 Dr. Usha Chundru Murphy, M.D.Walnut Creek, CA · $43 in drug and device payments (2025) ·
(925) 329-3710 Dr. Victoria Flavell, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Vincent Wong, MDWalnut Creek, CA · $89 in drug and device payments (2025) ·
(925) 296-7150 Dr. Vishal Panchal, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7150 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
Diagnostic Radiology in all 50 states Search all 4,516 in the directory Ask Zach for help choosing
Related
