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Emergency Medicine in Walnut Creek, California

Data updated monthly · Last refresh September 2026

97 Emergency Medicine providers practice in Walnut Creek, and 9% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Emergency Medicine providers in Walnut Creek

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. Aaron Mark Acosta, DO
Walnut 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, MD
Walnut 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, MD
Walnut 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, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Brian Lentz, MD, MS
Walnut 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, DO
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Charles Hansen, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Chi Perlroth, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 939-5800
Dr. Christian Timbol, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Christine Sutu
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Christopher Jaksa, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Conrad Lai, M.D
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 287-8777
Dr. Dale Poppert, MD
Walnut 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, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Daniel Menza, MD
Walnut 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, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-6723
Dr. David Roth, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. David Schumb, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. David Shapiro
Walnut 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, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Dhrumil Vyas
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Edward Lin, MD, MPH
Walnut 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, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (415) 508-8042
Dr. Eric Aaserude
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Eugenie Como
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Evan Chua
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Gina Pan, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Giselle Malina, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Hannon Patel, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Harold Woo, DO
Walnut 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, MD
Walnut Creek, CA · $30 in drug and device payments (2025) · (925) 295-4000
Dr. Jeanne Pae
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 939-5800
Dr. Jeffrey Huang, MD
Walnut 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, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. John Leonard, M.D
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 939-3000
Dr. John Rossi, MD
Walnut Creek, CA · No drug or device payments recorded (2025) · (925) 295-4000
Dr. Joshua Lee, M.D.
Walnut Creek, CA · $163 in drug and device payments (2025) · (925) 295-4000

Common questions

How many Emergency Medicine providers are in Walnut Creek, California?

There are 97 Emergency Medicine providers with active NPI records practicing in Walnut Creek, according to federal NPPES data refreshed monthly.

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

9 of 97 (9%) 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 Walnut Creek 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.