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. Michael Maloney, MDYreka, CA · No drug or device payments recorded (2025) ·
(530) 842-4121 Dr. Alka Thakran, M.D.Yuba City, CA · No drug or device payments recorded (2025) ·
(530) 671-8564 Dr. Amanda Hoang, MDYuba City, CA · $27 in drug and device payments (2025) ·
(530) 749-3387 Dr. Daniel Dorsey, M.D.Yuba City, CA · No drug or device payments recorded (2025) ·
(530) 671-8564 Dr. Gregory Federer, M.D.Yuba City, CA · $72 in drug and device payments (2025) ·
(530) 749-3301 Dr. Howard Youngworth, M.D.Yuba City, CA · No drug or device payments recorded (2025) ·
(530) 674-9000 Dr. Lynda Tsinany, M.D.Yuba City, CA · No drug or device payments recorded (2025) ·
(530) 749-3301 Dr. Maria Garcia, M.D.Yuba City, CA · $15 in drug and device payments (2025) ·
(530) 749-3301 Dr. Mark Schneider, M.D.Yuba City, CA · No drug or device payments recorded (2025) ·
(530) 749-3301 Dr. Nancy Chege, MDYuba City, CA · No drug or device payments recorded (2025) ·
(530) 673-6674 Dr. Nelson Frink, M.D.Yuba City, CA · No drug or device payments recorded (2025) ·
(530) 671-8564 Dr. Owen Vankirk, M.D.Yuba City, CA · No drug or device payments recorded (2025) ·
(530) 673-8616 Dr. Philip Shelton, M.D.Yuba City, CA · No drug or device payments recorded (2025) ·
(530) 799-3301 Dr. Robert Wankmuller, M.D.Yuba City, CA · No drug or device payments recorded (2025) ·
(530) 671-8564 Dr. Robert Wankmuller, M.D.Yuba City, CA · No drug or device payments recorded (2025) ·
(530) 674-9000 Dr. Susan Lott, M.D.Yuba City, CA · No drug or device payments recorded (2025) ·
(530) 671-8564 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.
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