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. Paul Johnson, M.D.Redding, CA · No drug or device payments recorded (2025) ·
(530) 225-7800 Dr. Robert Duvoisin, DORedding, CA · No drug or device payments recorded (2025) ·
(530) 225-6000 Dr. Robert Hamilton, MDRedding, CA · No drug or device payments recorded (2025) ·
(530) 225-6000 Dr. Robert Lawson, MDRedding, CA · No drug or device payments recorded (2025) ·
(530) 225-6000 Dr. Robert Porzio, DORedding, CA · No drug or device payments recorded (2025) ·
(530) 225-6000 Dr. Robin Rasmussen, MDRedding, CA · No drug or device payments recorded (2025) ·
(530) 244-5400 Dr. Ryan Meller, M.D.Redding, CA · $302 in drug and device payments (2025) ·
(530) 225-7240 Dr. Scott Zittel, DORedding, CA · No drug or device payments recorded (2025) ·
(530) 241-2151 Dr. Sheyann Kirby, DORedding, CA · No drug or device payments recorded (2025) ·
(530) 225-6000 Dr. Teri Boster, M.D.Redding, CA · No drug or device payments recorded (2025) ·
(530) 515-1699 Dr. Thomas Knutson, MDRedding, CA · No drug or device payments recorded (2025) ·
(858) 442-7904 Dr. Travis Mackenzie, M.D.Redding, CA · No drug or device payments recorded (2025) ·
(917) 822-9011 Dr. Vahini Koka, DORedding, CA · No drug or device payments recorded (2025) ·
(530) 225-6000 Dr. William Dykes, MDRedding, CA · No drug or device payments recorded (2025) ·
(510) 436-9000 Dr. Asim Iqbal, D.O.Redlands, CA · No drug or device payments recorded (2025) ·
(909) 335-5600 Dr. Brandon Lee, D.O.Redlands, CA · No drug or device payments recorded (2025) ·
(909) 335-5500 Dr. Dania Youssef, DORedlands, CA · $108 in drug and device payments (2025) ·
(909) 335-5500 Dr. David Chang, M.D.Redlands, CA · No drug or device payments recorded (2025) ·
(909) 335-5600 Dr. Deborah Behringer, MDRedlands, CA · $733 in drug and device payments (2025) ·
(909) 478-6731 Dr. James Wilson, M.DRedlands, CA · No drug or device payments recorded (2025) ·
(909) 335-5500 Dr. Jonathan Bolton, M.D.Redlands, CA · No drug or device payments recorded (2025) ·
(909) 335-4188 Dr. Michael Allen, D.O.Redlands, CA · No drug or device payments recorded (2025) ·
(909) 335-5500 Dr. Pha Le, D.O.Redlands, CA · $125 in drug and device payments (2025) ·
(714) 566-5235 Dr. Salomon Alvarado, DORedlands, CA · No drug or device payments recorded (2025) ·
(909) 335-5500 Dr. Khanh Nguyen, M.D.Redondo Beach, CA · No drug or device payments recorded (2025) ·
(310) 374-2145 Dr. Russell Knittel, MDRedondo Beach, CA · $21 in drug and device payments (2025) ·
(310) 374-5600 Dr. Sean Swearingen, MDRedondo Beach, CA · No drug or device payments recorded (2025) ·
(510) 910-1582 Dr. Adam Landsdorf, MDRedwood City, CA · No drug or device payments recorded (2025) ·
(650) 299-2000 Dr. Adriana Povlow, MDRedwood City, CA · No drug or device payments recorded (2025) ·
(650) 299-2200 Dr. Alex Walsh, DORedwood City, CA · No drug or device payments recorded (2025) ·
(650) 367-5976 Dr. Andrea Roberts, MDRedwood City, CA · No drug or device payments recorded (2025) ·
(650) 299-2000 Dr. Ariel Marks, M.DRedwood City, CA · No drug or device payments recorded (2025) ·
(650) 367-5541 Dr. Benoy Thomas, MDRedwood City, CA · No drug or device payments recorded (2025) ·
(650) 299-2000 Dr. Carmie Chan, MDRedwood City, CA · No drug or device payments recorded (2025) ·
(650) 299-2000 Dr. Cecily Sotomayor, M.D.Redwood City, CA · No drug or device payments recorded (2025) ·
(650) 299-2000 Dr. David Adams, M.DRedwood City, CA · No drug or device payments recorded (2025) ·
(650) 367-5541 Dr. Dheeraj Duggineni, MDRedwood City, CA · No drug or device payments recorded (2025) ·
(650) 299-2200 Dr. Eric Swanson, MD, MSCRedwood City, CA · No drug or device payments recorded (2025) ·
(650) 207-2172 Dr. Frank Ruiz, MDRedwood City, CA · $15 in drug and device payments (2025) ·
(650) 299-2000 Dr. Gary Macgregor, M.D.Redwood City, CA · No drug or device payments recorded (2025) ·
(650) 367-5541 Dr. George Bulloch, MDRedwood City, CA · No drug or device payments recorded (2025) ·
(650) 299-2000 Dr. George Oldham, M.DRedwood City, CA · No drug or device payments recorded (2025) ·
(650) 367-5541 Dr. Gregg Letsinger, MDRedwood City, CA · No drug or device payments recorded (2025) ·
(650) 299-2000 Dr. Gustavo Diaz, MDRedwood City, CA · $38 in drug and device payments (2025) ·
(650) 381-0616 Dr. Hiroya Nambu, MDRedwood City, CA · No drug or device payments recorded (2025) ·
(650) 299-2200 Dr. James Ahn, MDRedwood City, CA · No drug or device payments recorded (2025) ·
(650) 299-2000 Dr. John Meharg, M.DRedwood City, CA · No drug or device payments recorded (2025) ·
(650) 367-5541 Dr. John Rosenberg, MDRedwood City, CA · No drug or device payments recorded (2025) ·
(650) 299-2000 Dr. John Schwartz, M.D.Redwood City, CA · No drug or device payments recorded (2025) ·
(650) 299-2000 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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