Gastroenterology in Anaheim, California
Data updated monthly · Last refresh September 2026
25 Gastroenterology providers practice in Anaheim, and 60% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.
Gastroenterology providers in Anaheim
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. Ambika Bali, MDAnaheim, CA · $488 in drug and device payments (2025) ·
(714) 999-0909 Dr. Amit Bhanvadia, M.D.Anaheim, CA · $627 in drug and device payments (2025) ·
(714) 527-6000 Dr. Andrew Giap, MDAnaheim, CA · $116 in drug and device payments (2025) ·
(888) 988-2800 Dr. Bijal Surti, M.D.Anaheim, CA · No drug or device payments recorded (2025) ·
(888) 988-2800 Dr. Brian Riff, MDAnaheim, CA · $18,072 in drug and device payments (2025) · Telehealth ·
(714) 778-1300 Dr. Derek Tang, M.D.Anaheim, CA · No drug or device payments recorded (2025) ·
(714) 644-2000 Dr. Dick Yip, MDAnaheim, CA · $756 in drug and device payments (2025) ·
(714) 527-6000 Dr. Erica St Lawrence, MDAnaheim, CA · $1,210 in drug and device payments (2025) ·
(714) 527-6000 Dr. Gavin Jonas, MDAnaheim, CA · No drug or device payments recorded (2025) ·
(888) 988-2800 Dr. Jason Yip, M.D.Anaheim, CA · $281 in drug and device payments (2025) ·
(714) 527-6000 Dr. J. Egan, MDAnaheim, CA · No drug or device payments recorded (2025) ·
(888) 988-2800 Dr. Kathy Akashi, MDAnaheim, CA · No drug or device payments recorded (2025) ·
(888) 988-2800 Dr. Kavita Singh, MDAnaheim, CA · $1,695 in drug and device payments (2025) · Telehealth ·
(714) 778-1300 Dr. Kenneth Yamashiro, MDAnaheim, CA · No drug or device payments recorded (2025) ·
(714) 995-4704 Dr. Louis Hernandez, MDAnaheim, CA · No drug or device payments recorded (2025) ·
(888) 988-2800 Dr. Michael Kim, M.D.Anaheim, CA · $598 in drug and device payments (2025) · Telehealth ·
(714) 527-6000 Dr. Rex Wang, MDAnaheim, CA · No drug or device payments recorded (2025) ·
(888) 988-2800 Dr. Sitaraman Jyotheeswaran, M.D.Anaheim, CA · $23 in drug and device payments (2025) · Telehealth ·
(714) 491-3900 Dr. Stanford Gertler, MDAnaheim, CA · $1,115 in drug and device payments (2025) ·
(888) 988-2800 Dr. Syeda Husain, MDAnaheim, CA · No drug or device payments recorded (2025) ·
(888) 988-2800 Dr. Theodore Durbin, MDAnaheim, CA · No drug or device payments recorded (2025) ·
(888) 988-2800 Dr. Zhigang Song, M.D., PH.D. Conditions Gastroenterology providers in Anaheim, 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 Anaheim, California?There are 25 Gastroenterology providers with active NPI records practicing in Anaheim, according to federal NPPES data refreshed monthly.
How many Gastroenterology providers in Anaheim received drug or device company payments?15 of 25 (60%) 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 Anaheim treat?Gastroenterology providers in Anaheim 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 Anaheim Gastroenterology across California