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. Chad Selph, M.D.Santa Barbara, CA · $295 in drug and device payments (2025) ·
(805) 682-7984 Dr. Christopher Herzig, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. Christopher Kurylo, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7111 Dr. Christopher Kuzminski, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7111 Dr. Cynthia Withers, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 569-7279 Dr. Dale Sue, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. Daniel Fox, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. Daniel Sommer, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. David Mills, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-9666 Dr. Donna Winingham, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7744 Dr. Elyor VidalSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7111 Dr. Gary Blum, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. Giang Nguyen, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. Hector Rodriguez, M.D.Santa Barbara, CA · $20 in drug and device payments (2025) ·
(805) 569-7279 Dr. Ivan Hayward, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. Jacob Harter, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7744 Dr. James Benzian, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 569-7279 Dr. James Day, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. Jason Barksdale, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. Jennifer Kosek, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. John Bohannan, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. John Mardiat, M.D.Santa Barbara, CA · $92 in drug and device payments (2025) ·
(805) 448-5825 Dr. John Stef, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. John Wheelock, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 569-7279 Dr. John Wrench, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. John Yoon, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 569-7279 Dr. Jonathan Coll, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 708-7976 Dr. Joseph Burns, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. Joseph Luna, M.D.Santa Barbara, CA · $43 in drug and device payments (2025) ·
(805) 602-7744 Dr. Karthik Kumar, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7744 Dr. Kathleen Pojunas, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 569-7279 Dr. Katryana Hanley-knutson, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7111 Dr. Kenneth Daughters, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 569-7279 Dr. Keval Patel, DOSanta Barbara, CA · $3,263 in drug and device payments (2025) ·
(805) 682-7744 Dr. Kyle Schwartz, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7111 Dr. Laurel Hansch, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. Lawrence Harter, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. Linda Mulder, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7744 Dr. Luke Lammers, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7111 Dr. Manu Singh, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 569-7573 Dr. Marlon Black, M.D.Santa Barbara, CA · $545 in drug and device payments (2025) ·
(805) 682-7984 Dr. Matthew Backer, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 569-2964 Dr. Michael Trambert, M.D.Santa Barbara, CA · $42 in drug and device payments (2025) ·
(805) 569-7279 Dr. Michael WeedSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7111 Dr. Michael WrightSanta Barbara, CA · No drug or device payments recorded (2025) ·
(510) 683-9500 Dr. Monica Micon, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 569-7279 Dr. Paul Douglas, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7744 Dr. Paymann Moin, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. Ramona Clark, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 Dr. Raymond Mastrovito, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7984 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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