Gastroenterology in Oakland, California
Data updated monthly · Last refresh September 2026
27 Gastroenterology providers practice in Oakland, and 41% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.
Gastroenterology providers in Oakland
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. Ayesha Zahiruddin, MDOakland, CA · $487 in drug and device payments (2025) ·
(510) 437-4800 Dr. Charles Wang, MDOakland, CA · No drug or device payments recorded (2025) ·
(916) 784-4000 Dr. Cynthia Morton, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Danny Wu, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 444-3297 Dr. Earl Darby, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 444-3297 Dr. Eddie Cheung, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 654-5555 Dr. Hank Wang, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. John Roark, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 589-8774 Dr. Kevin KaneOakland, CA · $1,134 in drug and device payments (2025) · Telehealth ·
(510) 444-3297 Dr. Kimberly Cusato, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Laura Pace, M.D., PH.D.Oakland, CA · $157 in drug and device payments (2025) ·
(801) 688-8636 Dr. Liana Vesga, MDOakland, CA · $3,069 in drug and device payments (2025) · Telehealth ·
(510) 444-3297 Dr. Michael Udkow, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Mitchell Liverant, M.D.Oakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(646) 580-8292 Dr. Neil Stollman, MDOakland, CA · $1,947 in drug and device payments (2025) · Telehealth ·
(510) 444-3297 Dr. Paul Chard, MD PHDOakland, CA · $869 in drug and device payments (2025) ·
(510) 444-3297 Dr. Ralph Peterson, MDOakland, CA · $11,902 in drug and device payments (2025) · Telehealth ·
(510) 562-7467 Dr. Ronald Adler, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4323 Dr. Sanya Wadhwa, M.D.Oakland, CA · $2,368 in drug and device payments (2025) ·
(510) 444-3297 Dr. Sassan Pazirandeh, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Silvia Villagomez, MDOakland, CA · $1,742 in drug and device payments (2025) · Telehealth ·
(510) 444-3297 Dr. Stephanie Santos, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 752-1000 Dr. Stephanie Yan, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(916) 973-6961 Dr. Susie Cohn, MDOakland, CA · $3,164 in drug and device payments (2025) · Telehealth ·
(510) 444-3297 Dr. Thomas Hargrave, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 444-3297 Dr. Zealous Wiley, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 444-3297 Conditions Gastroenterology providers in Oakland, California commonly treat
Patients often search by condition rather than specialty. These are conditions typically managed by Gastroenterology providers. Individual practices vary, so confirm with the provider before booking.
- Acid reflux
- IBS
- Crohn disease
- Ulcerative colitis
- Celiac disease
- Colon cancer screening
Common questions
How many Gastroenterology providers are in Oakland, California?There are 27 Gastroenterology providers with active NPI records practicing in Oakland, according to federal NPPES data refreshed monthly.
How many Gastroenterology providers in Oakland received drug or device company payments?11 of 27 (41%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
What conditions do Gastroenterology providers in Oakland treat?Gastroenterology providers in Oakland commonly treat acid reflux, IBS, Crohn disease, ulcerative colitis, celiac disease and related conditions. Individual practices vary, so confirm with the provider before booking.
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 Oakland Gastroenterology across California