Emergency Medicine Doctors in California
Data updated monthly · Last refresh October 2026
7,777 Emergency Medicine providers practice in California, including 234 (3%) 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.
7,777providers
234telehealth
Los Angelestop city
Emergency Medicine by city in California
Choose a city to see providers there.
Emergency Medicine 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. Matthew Fukuda, MDRiverside, CA · No drug or device payments recorded (2025) ·
(951) 788-3124 Dr. Maxwell Hill, MDRiverside, CA · No drug or device payments recorded (2025) ·
(951) 788-3000 Dr. Michael Cordeiro, M.D.Riverside, CA · No drug or device payments recorded (2025) ·
(951) 353-2000 Dr. Michael Kang, M.D.Riverside, CA · $142 in drug and device payments (2025) ·
(951) 684-3910 Dr. Michael Louthan, MDRiverside, CA · No drug or device payments recorded (2025) ·
(408) 655-7485 Dr. Michael Lowe, M.D.Riverside, CA · No drug or device payments recorded (2025) ·
(951) 352-5666 Dr. Michael Ratter, M.D.Riverside, CA · No drug or device payments recorded (2025) ·
(951) 352-5666 Dr. Mi Song Kim, MDRiverside, CA · No drug or device payments recorded (2025) ·
(951) 788-3000 Dr. Nader BadriRiverside, CA · No drug or device payments recorded (2025) ·
(951) 788-3000 Dr. Nash Martinez, M.D.Riverside, CA · No drug or device payments recorded (2025) ·
(951) 353-2000 Dr. Nicole Lau, MDRiverside, CA · $121 in drug and device payments (2025) ·
(951) 788-3000 Dr. Oscar Benitez, MDRiverside, CA · No drug or device payments recorded (2025) ·
(909) 353-2000 Dr. Paul Inae, MDRiverside, CA · No drug or device payments recorded (2025) ·
(951) 358-6035 Dr. Peter Kaganjo, MDRiverside, CA · No drug or device payments recorded (2025) ·
(951) 827-7669 Dr. Piyush Viradia, MDRiverside, CA · No drug or device payments recorded (2025) ·
(951) 697-5453 Dr. Rebecca Bishop, M.D.Riverside, CA · No drug or device payments recorded (2025) ·
(951) 788-3000 Dr. Reynalda Martel-cazares, M.D.Riverside, CA · No drug or device payments recorded (2025) ·
(951) 353-2000 Dr. Richard Clinton, M.D.Riverside, CA · No drug or device payments recorded (2025) ·
(951) 353-3790 Dr. Richard Guth, M.DRiverside, CA · No drug or device payments recorded (2025) ·
(909) 788-3000 Dr. Rishi Bommannan, MDRiverside, CA · No drug or device payments recorded (2025) ·
(951) 788-3536 Dr. Roberta Dunn-dixon, M.D.Riverside, CA · No drug or device payments recorded (2025) ·
(951) 788-3200 Dr. Robert Cannon, M.D.Riverside, CA · $38 in drug and device payments (2025) ·
(951) 352-5666 Dr. Romero KupaiRiverside, CA · No drug or device payments recorded (2025) ·
(951) 788-3000 Dr. Ronald Moy, M.D.Riverside, CA · $95 in drug and device payments (2025) ·
(951) 898-0823 Dr. Rushil Anil PatelRiverside, CA · No drug or device payments recorded (2025) ·
(951) 788-3000 Dr. Ryan Brenchley, M.D.Riverside, CA · No drug or device payments recorded (2025) ·
(909) 788-3000 Dr. Ryan Carlson, MDRiverside, CA · $25 in drug and device payments (2025) ·
(951) 788-3537 Dr. Saema SaidRiverside, CA · No drug or device payments recorded (2025) ·
(858) 531-0844 Dr. Samuel Teles, MDRiverside, CA · No drug or device payments recorded (2025) ·
(951) 788-3000 Dr. Sana Hadyah, MDRiverside, CA · No drug or device payments recorded (2025) ·
(951) 788-3536 Dr. Sassan Ghassemzadeh, M.D.Riverside, CA · No drug or device payments recorded (2025) ·
(951) 788-3000 Dr. Shannon West, D.O.Riverside, CA · No drug or device payments recorded (2025) ·
(951) 353-2000 Dr. Stephen Ferrall, MDRiverside, CA · No drug or device payments recorded (2025) ·
(909) 353-2000 Dr. Stephen Patterson, M.D.Riverside, CA · $57 in drug and device payments (2025) ·
(951) 788-3200 Dr. Steve Choi, DORiverside, CA · No drug or device payments recorded (2025) ·
(833) 574-2273 Dr. Thien Nguyen, MDRiverside, CA · $71 in drug and device payments (2025) ·
(951) 809-2738 Dr. Trevor Smith, MDRiverside, CA · No drug or device payments recorded (2025) ·
(951) 788-3536 Dr. Vincent Kong, DORiverside, CA · No drug or device payments recorded (2025) ·
(951) 788-3536 Dr. Vinson Vong, MDRiverside, CA · No drug or device payments recorded (2025) ·
(951) 788-3537 Dr. Zara Khan, MDRiverside, CA · No drug or device payments recorded (2025) ·
(951) 788-3000 Dr. Kenneth Kizer, MDRocklin, CA · No drug or device payments recorded (2025) ·
(916) 624-1774 Dr. Ravneet Dhillon, MBBSRocklin, CA · $697 in drug and device payments (2025) ·
(585) 520-5353 Dr. Vance Van Tassell, M.D. Dr. Aaron Blackledge, M.D.Rohnert Park, CA · No drug or device payments recorded (2025) ·
(707) 584-0672 Dr. Jessica Stanton, M.D.Rohnert Park, CA · No drug or device payments recorded (2025) ·
(707) 584-0672 Dr. Kathy Principi, M.D.Rohnert Park, CA · No drug or device payments recorded (2025) ·
(707) 584-0672 Dr. Mordehai Zadik, M.D.Rohnert Park, CA · No drug or device payments recorded (2025) ·
(707) 584-0672 Dr. Mark MarshallRosevill, CA · No drug or device payments recorded (2025) ·
(330) 493-4443 Dr. Adam Mauricio, MDRoseville, CA · No drug or device payments recorded (2025) ·
(916) 781-1647 Dr. Andrei Callejas, MDRoseville, CA · No drug or device payments recorded (2025) ·
(916) 781-1000 Common questions
How many Emergency Medicine providers are in California?There are 7,777 Emergency Medicine providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Do Emergency Medicine providers in California offer telehealth?Yes. 234 of the 7,777 Emergency Medicine providers in California (about 3%) report offering telehealth services in CMS data.
Which cities in California have the most Emergency Medicine providers?Los Angeles (630), San Diego (496), Sacramento (371) have the highest concentration of Emergency Medicine providers in California.
How many Emergency Medicine providers in California received drug or device company payments?1,103 of 7,777 Emergency Medicine providers in California (14%) 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 Emergency Medicine Doctors in California work in independent practices or large health systems?Among 4,164 Emergency Medicine Doctors in California enrolled in Medicare, 7% bill through a solo or small practice with fewer than 10 clinicians, 27% through a mid-size group of 10 to 99, and 66% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Emergency Medicine Doctors in California work at?According to CMS facility affiliation records, the California hospitals where the most Emergency Medicine Doctors hold privileges are Uci Health-Orange in Orange; Stanford Health Care in Stanford; Kaiser Foundation Hospital - Oakland/Richmond in Oakland.
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