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Emergency Medicine in Riverside, California

Data updated monthly · Last refresh September 2026

104 Emergency Medicine providers practice in Riverside, and 16% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Emergency Medicine providers in Riverside

Listed alphabetically. 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. Julia Glavinic
Riverside, CA · No drug or device payments recorded (2025) · (909) 478-5554
Dr. Julie Kasarjian, M.D., PH.D.
Riverside, CA · $367 in drug and device payments (2025) · (951) 683-6596
Dr. Julius Ibanez, M.D.
Riverside, CA · No drug or device payments recorded (2025) · (951) 352-5666
Dr. Kathy Chuang, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 353-3970
Dr. Kendrick Belardo, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 205-3340
Dr. Kenneth Dale, D.O
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-3000
Dr. Kenneth Johnson, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-3537
Dr. Kenneth Nickson, M.D
Riverside, CA · No drug or device payments recorded (2025) · (909) 788-3000
Dr. Kevin Sawchuk, MD
Riverside, CA · $43 in drug and device payments (2025) · (951) 688-2211
Dr. Lawrence Mazur, DO
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Manparbodh Kaur
Riverside, CA · No drug or device payments recorded (2025) · (760) 514-6099
Dr. Marcus Voth, M.D
Riverside, CA · No drug or device payments recorded (2025) · (909) 788-3000
Dr. Margarita Mendoza, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 353-2000
Dr. Maria Tobar, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-3536
Dr. Matthew Fukuda, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-3124
Dr. Maxwell Hill, MD
Riverside, 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, MD
Riverside, 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, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-3000
Dr. Nader Badri
Riverside, 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, MD
Riverside, CA · $121 in drug and device payments (2025) · (951) 788-3000
Dr. Oscar Benitez, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Paul Inae, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 358-6035
Dr. Peter Kaganjo, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 827-7669
Dr. Piyush Viradia, MD
Riverside, 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.D
Riverside, CA · No drug or device payments recorded (2025) · (909) 788-3000
Dr. Rishi Bommannan, MD
Riverside, 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 Kupai
Riverside, 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 Patel
Riverside, 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, MD
Riverside, CA · $25 in drug and device payments (2025) · (951) 788-3537
Dr. Saema Said
Riverside, CA · No drug or device payments recorded (2025) · (858) 531-0844
Dr. Samuel Teles, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-3000
Dr. Sana Hadyah, MD
Riverside, 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, MD
Riverside, 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, DO
Riverside, CA · No drug or device payments recorded (2025) · (833) 574-2273
Dr. Thien Nguyen, MD
Riverside, CA · $71 in drug and device payments (2025) · (951) 809-2738

Common questions

How many Emergency Medicine providers are in Riverside, California?

There are 104 Emergency Medicine providers with active NPI records practicing in Riverside, according to federal NPPES data refreshed monthly.

How many Emergency Medicine providers in Riverside received drug or device company payments?

17 of 104 (16%) 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 records 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.

All specialties in Riverside Emergency Medicine across California

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
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.