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. John Baker, MDVista, CA · No drug or device payments recorded (2025) ·
(760) 806-5400 Dr. Telesforo Molina, MDVista, CA · No drug or device payments recorded (2025) ·
(760) 806-5400 Dr. Alexander Wielaard, MDWalnut, CA · No drug or device payments recorded (2025) ·
(706) 306-4668 Dr. Aaron Mark Acosta, DOWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Alec Richmond, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Alexander Lippert, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Alice Hunter, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 939-3000 Dr. Andrew Kives, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 939-3000 Dr. Andrew Otto, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(540) 981-7000 Dr. Anthony Waechter, MDWalnut Creek, CA · $249 in drug and device payments (2025) ·
(925) 295-4000 Dr. Bradford Tinloy, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3210 Dr. Brian Baskin, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Brian Lentz, MD, MSWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 939-3000 Dr. Brook Woolley, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-5100 Dr. Bruce Marts, DOWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Charles Hansen, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Chi Perlroth, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 939-5800 Dr. Christian Timbol, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Christine SutuWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Christopher Jaksa, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Conrad Lai, M.DWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 287-8777 Dr. Dale Poppert, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Daniel Buhler, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 939-3000 Dr. Daniel Lewis, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Daniel Menza, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. David Birdsall, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 939-3000 Dr. David Lilienstein, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-6723 Dr. David Roth, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. David Schumb, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. David ShapiroWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. David Soohoo, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 939-3000 Dr. David Wei, M.D.Walnut Creek, CA · $355 in drug and device payments (2025) ·
(925) 939-5800 Dr. Delphine Ho, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Dhrumil VyasWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Edward Lin, MD, MPHWalnut Creek, CA · $26 in drug and device payments (2025) · Telehealth ·
(925) 296-9000 Dr. Elizabeth Cho, M.D.Walnut Creek, CA · $118 in drug and device payments (2025) ·
(925) 295-4000 Dr. Elizabeth Nguyen, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(415) 508-8042 Dr. Eric AaserudeWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Eugenie ComoWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Evan ChuaWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Gina Pan, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Giselle Malina, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Hannon Patel, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Harold Woo, DOWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 708-2038 Dr. Jack Choi, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(510) 625-6262 Dr. Jackie Nguyen, MDWalnut Creek, CA · $30 in drug and device payments (2025) ·
(925) 295-4000 Dr. Jeanne PaeWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 939-5800 Dr. Jeffrey Huang, MDWalnut Creek, CA · $40 in drug and device payments (2025) ·
(925) 295-4000 Dr. Jehnan Liu, M.D. PH.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Jenny Tai, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 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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