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Gastroenterology in Portland, Oregon

Data updated monthly · Last refresh September 2026

135 Gastroenterology providers practice in Portland, and 47% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Gastroenterology providers in Portland

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. Adam Silverblatt, M.D.
Portland, OR · No drug or device payments recorded (2025) · (503) 297-8081
Dr. Aditi Reddy
Portland, OR · No drug or device payments recorded (2025) · Telehealth · (503) 494-4373
Dr. Ajay Singhvi, M.D.
Portland, OR · $144 in drug and device payments (2025) · Telehealth · (503) 963-2707
Dr. Alan Kaynard, MD
Portland, OR · No drug or device payments recorded (2025) · (503) 297-8081
Dr. Alan Savoy, MD
Portland, OR · No drug or device payments recorded (2025) · Telehealth · (503) 963-2707
Dr. Albert Khine, M.D.
Portland, OR · $809 in drug and device payments (2025) · Telehealth · (503) 221-0161
Dr. Amnon Sonnenberg, MD
Portland, OR · No drug or device payments recorded (2025) · (503) 220-8262
Dr. Amy Wang, MD
Portland, OR · $125 in drug and device payments (2025) · Telehealth · (503) 297-8081
Dr. Amy Zhu, MD
Portland, OR · $70,452 in drug and device payments (2025) · Telehealth · (503) 963-2707
Dr. Andy Barnett, MD
Portland, OR · No drug or device payments recorded (2025) · (503) 494-0924
Dr. Anil Sharma, M.D.
Portland, OR · $13,794 in drug and device payments (2025) · Telehealth · (503) 297-8081
Dr. Anna Sasaki, MD, PHD
Portland, OR · No drug or device payments recorded (2025) · (503) 220-8262
Dr. Anne Wang, MD
Portland, OR · No drug or device payments recorded (2025) · Telehealth · (503) 963-2707
Dr. Anthony Razzak, M.D.
Portland, OR · $24 in drug and device payments (2025) · Telehealth · (503) 963-2707
Dr. Arnab Mitra, M.D.
Portland, OR · No drug or device payments recorded (2025) · Telehealth · (503) 494-7127
Dr. Atif Zaman, MD
Portland, OR · No drug or device payments recorded (2025) · Telehealth · (503) 494-4373
Dr. Barry Schlansky, M.D.
Portland, OR · No drug or device payments recorded (2025) · (800) 813-2000
Dr. Betty Kim, MD
Portland, OR · $125 in drug and device payments (2025) · Telehealth · (503) 963-2707
Dr. Branden Tarlow, MD
Portland, OR · $180 in drug and device payments (2025) · Telehealth · (503) 963-2707
Dr. Brent Lee, M.D.
Portland, OR · No drug or device payments recorded (2025) · Telehealth · (503) 297-8081
Dr. Brintha Enestvedt, MD
Portland, OR · $50 in drug and device payments (2025) · Telehealth · (503) 297-8081
Dr. Caitlin Citti, M.D.
Portland, OR · $174 in drug and device payments (2025) · (503) 494-4373
Dr. Charles Gabbert
Portland, OR · $703 in drug and device payments (2025) · Telehealth · (503) 963-2707
Dr. Christopher Carter, MD
Portland, OR · No drug or device payments recorded (2025) · (503) 297-8081
Dr. Clifford Melnyk, MD
Portland, OR · No drug or device payments recorded (2025) · (503) 494-8577
Dr. Craig Fausel, MD
Portland, OR · No drug or device payments recorded (2025) · (503) 963-2707
Dr. Cristian Vallejos, M.D.
Portland, OR · No drug or device payments recorded (2025) · Telehealth · (503) 297-8081
Dr. David Grunkemeier, MD
Portland, OR · No drug or device payments recorded (2025) · Telehealth · (503) 297-8081
Dr. David Lieberman, M.D.
Portland, OR · $103 in drug and device payments (2025) · (503) 273-5318
Dr. Debbie Cheng, MD
Portland, OR · $26 in drug and device payments (2025) · Telehealth · (503) 963-2707
Dr. Dekey Lhewa, MD
Portland, OR · No drug or device payments recorded (2025) · Telehealth · (503) 494-4373
Dr. Dennis Sweeney, MD
Portland, OR · No drug or device payments recorded (2025) · (503) 963-2707
Dr. Deron Amador, M.D.
Portland, OR · No drug or device payments recorded (2025) · Telehealth · (503) 297-8081
Dr. Diane Williams, DO
Portland, OR · No drug or device payments recorded (2025) · (503) 297-8081
Dr. Dirk Van Leeuwen, M.D., PH.D., FAASLD
Portland, OR · No drug or device payments recorded (2025) · (503) 255-3054
Dr. Donald Lum, MD
Portland, OR · $86,737 in drug and device payments (2025) · Telehealth · (503) 963-2707
Dr. Douglas Shumaker, MD
Portland, OR · No drug or device payments recorded (2025) · Telehealth · (503) 297-8081
Dr. Douglas Walta, MD
Portland, OR · No drug or device payments recorded (2025) · (503) 963-2707
Dr. Elliot Joo, MD
Portland, OR · $189 in drug and device payments (2025) · Telehealth · (503) 297-8081
Dr. Emery Lin, M.D.
Portland, OR · $698 in drug and device payments (2025) · (503) 494-4373
Dr. Emily Jonica, M.D.
Portland, OR · $1,825 in drug and device payments (2025) · Telehealth · (503) 494-4373
Dr. Erich Vorlop, M.D.
Portland, OR · $66 in drug and device payments (2025) · Telehealth · (503) 229-7137
Dr. Fouad Otaki, M.D.
Portland, OR · $3,432 in drug and device payments (2025) · Telehealth · (503) 494-4373
Dr. Gennadiy Bakis, M.D.
Portland, OR · $129 in drug and device payments (2025) · Telehealth · (503) 963-2707
Dr. George Koval, MD
Portland, OR · No drug or device payments recorded (2025) · (503) 297-8081
Dr. Ginger Degravelle, MD
Portland, OR · $225 in drug and device payments (2025) · Telehealth · (503) 255-3054
Dr. Glenn Eisen, MD
Portland, OR · No drug or device payments recorded (2025) · (503) 297-8081
Dr. Gregory Cote, MD, MS
Portland, OR · $306 in drug and device payments (2025) · Telehealth · (503) 494-4373
Dr. Harry Bray, MD
Portland, OR · $102 in drug and device payments (2025) · (503) 963-2707
Dr. Herbert Salomon, M.D.
Portland, OR · No drug or device payments recorded (2025) · (503) 813-2843

Conditions Gastroenterology providers in Portland, Oregon 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.

Common questions

How many Gastroenterology providers are in Portland, Oregon?

There are 135 Gastroenterology providers with active NPI records practicing in Portland, according to federal NPPES data refreshed monthly.

How many Gastroenterology providers in Portland received drug or device company payments?

64 of 135 (47%) 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 Portland treat?

Gastroenterology providers in Portland 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 Portland Gastroenterology across Oregon

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.