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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 in Los Angeles630 providers
Emergency Medicine in San Diego496 providers
Emergency Medicine in Sacramento371 providers
Emergency Medicine in San Francisco291 providers
Emergency Medicine in Oakland251 providers
Emergency Medicine in Fresno229 providers
Emergency Medicine in Torrance196 providers
Emergency Medicine in Orange179 providers
Emergency Medicine in Loma Linda169 providers
Emergency Medicine in Stanford164 providers
Emergency Medicine in Bakersfield117 providers
Emergency Medicine in San Jose114 providers
Emergency Medicine in Colton109 providers
Emergency Medicine in Riverside104 providers
Emergency Medicine in Walnut Creek97 providers
Emergency Medicine in Rancho Mirage76 providers
Emergency Medicine in Visalia73 providers
Emergency Medicine in Long Beach69 providers
Emergency Medicine in Modesto68 providers
Emergency Medicine in Santa Rosa64 providers
Emergency Medicine in Palm Springs63 providers
Emergency Medicine in San Leandro59 providers
Emergency Medicine in La Jolla59 providers
Emergency Medicine in Anaheim58 providers

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. David Moyal, PA
Castro Valley, CA · No drug or device payments recorded (2025) · (209) 342-2300
Dr. Emily Nelson, DO
Castro Valley, CA · No drug or device payments recorded (2025) · (651) 249-4082
Dr. Emmanuel Quaidoo
Castro Valley, CA · No drug or device payments recorded (2025) · (510) 727-3015
Dr. Merrill Chandler, MD
Castro Valley, CA · No drug or device payments recorded (2025) · (209) 342-2300
Dr. Nathalie Coeller, MD
Castro Valley, CA · No drug or device payments recorded (2025) · (510) 714-8520
Dr. Peter Joseph, MD
Castro Valley, CA · No drug or device payments recorded (2025) · (209) 342-2300
Dr. Rahim Sharifi, M.D.
Castro Valley, CA · No drug or device payments recorded (2025) · (510) 247-6300
Dr. Ralph Damato, MD
Castro Valley, CA · No drug or device payments recorded (2025) · (209) 342-2300
Dr. Riley North, MD
Castro Valley, CA · No drug or device payments recorded (2025) · (501) 727-3015
Dr. Rochelle Eggleston Philapil, MD
Castro Valley, CA · No drug or device payments recorded (2025) · (209) 342-2300
Dr. Scott Powell, M.D.
Castro Valley, CA · No drug or device payments recorded (2025) · (510) 727-3320
Dr. Tatiana Mamantov, MD
Castro Valley, CA · No drug or device payments recorded (2025) · (209) 342-2300
Dr. Thomas Eales, DO
Castro Valley, CA · No drug or device payments recorded (2025) · (510) 727-3320
Dr. Winnie Chan, MD
Castro Valley, CA · No drug or device payments recorded (2025) · (877) 346-2211
Dr. Glen Grayman, M.D
Cathedral City, CA · No drug or device payments recorded (2025) · (760) 323-6251
Dr. Carlos Dayrit, MD
Cerritos, CA · $30 in drug and device payments (2025) · (562) 547-2006
Dr. Brent Bills, M.D.
Chico, CA · No drug or device payments recorded (2025) · (530) 332-6850
Dr. Bruce Aikin, MD
Chico, CA · No drug or device payments recorded (2025) · (530) 332-6337
Dr. Charles Merriman, MD
Chico, CA · No drug or device payments recorded (2025) · (530) 332-6337
Dr. Christopher Rhead, MD
Chico, CA · No drug or device payments recorded (2025) · (530) 332-6337
Dr. Corey Mcnamee, M.D.
Chico, CA · No drug or device payments recorded (2025) · (530) 332-7300
Dr. Cory Boyles, MD
Chico, CA · No drug or device payments recorded (2025) · (530) 332-6337
Dr. Douglas Leavitt, MD
Chico, CA · No drug or device payments recorded (2025) · (530) 332-6337
Dr. Eric Liu, M.D.
Chico, CA · No drug or device payments recorded (2025) · (530) 332-7743
Dr. Frances Katris, M.D.
Chico, CA · No drug or device payments recorded (2025) · (530) 332-6850
Dr. Jason Bell
Chico, CA · No drug or device payments recorded (2025) · (530) 566-2016
Dr. Jeffrey Swenson, M.D.
Chico, CA · No drug or device payments recorded (2025) · (530) 332-6850
Dr. John Whitman, MD
Chico, CA · No drug or device payments recorded (2025) · (530) 332-7479
Dr. Keith Kinoshita, MD
Chico, CA · No drug or device payments recorded (2025) · (530) 332-7740
Dr. Kenneth Fleming, MD
Chico, CA · No drug or device payments recorded (2025) · (530) 332-6337
Dr. Mark Bohlander, MD
Chico, CA · No drug or device payments recorded (2025) · (530) 332-6856
Dr. Michael Disano, MD
Chico, CA · $214 in drug and device payments (2025) · Telehealth · (530) 332-7300
Dr. Michael Fraters, D.O.
Chico, CA · No drug or device payments recorded (2025) · (530) 891-1676
Dr. Robert Clements, MD
Chico, CA · $1,521 in drug and device payments (2025) · (530) 855-0213
Dr. Ruth Granlund, MD
Chico, CA · No drug or device payments recorded (2025) · (530) 332-6850
Dr. Stephen Shipley, MD
Chico, CA · No drug or device payments recorded (2025) · (530) 332-7330
Dr. Steven Zlotowski, MD
Chico, CA · No drug or device payments recorded (2025) · (530) 332-6337
Dr. Vincent Balardi
Chico, CA · No drug or device payments recorded (2025) · (530) 332-7330
Dr. William Voelker, MD
Chico, CA · No drug or device payments recorded (2025) · (530) 332-7479
Dr. Ashok Madahar, M.D.
Chino, CA · No drug or device payments recorded (2025) · (909) 464-8666
Dr. Ashraf Abdel-kerim
Chino, CA · No drug or device payments recorded (2025) · (909) 464-8666
Dr. Chase Socha, M.D., M.P.H.
Chino, CA · No drug or device payments recorded (2025) · (909) 464-8600
Dr. Douglas Cochrane, M.D.
Chino, CA · $21 in drug and device payments (2025) · (909) 464-8666
Dr. Francisco Ornelas, M.D.
Chino, CA · No drug or device payments recorded (2025) · (909) 464-8666
Dr. Haider Rizvi, MD
Chino, CA · No drug or device payments recorded (2025) · (909) 464-8666
Dr. James Winn, D.O.
Chino, CA · No drug or device payments recorded (2025) · (909) 464-8666
Dr. Jason Mathews, DO
Chino, CA · No drug or device payments recorded (2025) · (909) 464-9675
Dr. Jorge Perez, M.D.
Chino, CA · No drug or device payments recorded (2025) · (909) 464-8666
Dr. Jose Diaz, M.D.
Chino, CA · $75 in drug and device payments (2025) · (909) 464-8667
Dr. Khoa Luong, D.O.
Chino, CA · No drug or device payments recorded (2025) · (909) 591-0051

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.

Related reading on HealthcareDiscovery.AI

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Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory. Are you a Emergency Medicine in California? Get featured.