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Gastroenterologists in Oregon

Data updated monthly · Last refresh October 2026

277 Gastroenterology providers practice in Oregon, including 123 (44%) offering telehealth. The largest concentration is in Portland. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.

277providers
123telehealth
Portlandtop city

Gastroenterology by city in Oregon

Choose a city to see providers there.

Gastroenterology in Portland135 providers
Gastroenterology in Springfield21 providers
Gastroenterology in Tualatin18 providers
Gastroenterology in Salem17 providers
Gastroenterology in Clackamas14 providers
Gastroenterology in Bend14 providers
Gastroenterology in Oregon City10 providers
Gastroenterology in Medford9 providers
Gastroenterology in Hillsboro8 providers
Gastroenterology in Roseburg8 providers
Gastroenterology in Corvallis7 providers
Gastroenterology in Tigard2 providers
Gastroenterology in Milwaukie2 providers
Gastroenterology in Eugene2 providers
Gastroenterology in Hermiston2 providers
Gastroenterology in Gresham2 providers
Gastroenterology in Mcminnville1 providers
Gastroenterology in Albany1 providers
Gastroenterology in Newport1 providers
Gastroenterology in Ashland1 providers
Gastroenterology in Newberg1 providers
Gastroenterology in Lebanon1 providers

Gastroenterology providers in Oregon

Listed by city, largest first. 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. 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
Dr. Hong Shen, M.D.
Portland, OR · No drug or device payments recorded (2025) · Telehealth · (503) 963-2707
Dr. Ian Holmes, MD
Portland, OR · $575 in drug and device payments (2025) · Telehealth · (503) 963-2707
Dr. James Regan, MD
Portland, OR · $152 in drug and device payments (2025) · Telehealth · (503) 963-2707
Dr. Janice Jou, M.D.
Portland, OR · No drug or device payments recorded (2025) · (503) 494-9276
Dr. Jason Powers, M.D.
Portland, OR · No drug or device payments recorded (2025) · (503) 331-6170
Dr. Jeffrey Albaugh, MD
Portland, OR · No drug or device payments recorded (2025) · (503) 963-2707
Dr. Jeffrey Weprin, MD
Portland, OR · No drug or device payments recorded (2025) · Telehealth · (503) 297-8081
Dr. Jenna Anderson
Portland, OR · No drug or device payments recorded (2025) · (503) 494-4373
Dr. Jennifer Yeh, MD
Portland, OR · $40 in drug and device payments (2025) · Telehealth · (503) 963-2707
Dr. Jeremy Holden, MD
Portland, OR · $50 in drug and device payments (2025) · Telehealth · (503) 963-2707
Dr. Jessica Yu, MD
Portland, OR · $327 in drug and device payments (2025) · Telehealth · (503) 494-4373
Dr. John Haughom, MD
Portland, OR · No drug or device payments recorded (2025) · (541) 912-2573
Dr. John Jendrzejewski, MD
Portland, OR · No drug or device payments recorded (2025) · (503) 297-8081
Dr. John Lobitz, MD
Portland, OR · No drug or device payments recorded (2025) · (503) 297-8081
Dr. Jonathan Schwartz, MD
Portland, OR · $140 in drug and device payments (2025) · Telehealth · (503) 494-8577
Dr. Joseph Parent, M.D.
Portland, OR · No drug or device payments recorded (2025) · (503) 241-1992
Dr. Judith Collins, MD
Portland, OR · No drug or device payments recorded (2025) · (503) 494-8577
Dr. Julie Kim, M.D.
Portland, OR · No drug or device payments recorded (2025) · (503) 229-7137
Dr. Justin Lewis, M.D.
Portland, OR · $935 in drug and device payments (2025) · (503) 255-3054
Dr. Kandice Knigge, MD
Portland, OR · No drug or device payments recorded (2025) · (503) 494-8577
Dr. Karen Saks, MD
Portland, OR · No drug or device payments recorded (2025) · Telehealth · (503) 297-8081
Dr. Katherine Black, MD
Portland, OR · $66 in drug and device payments (2025) · Telehealth · (503) 229-7137
Dr. Kaveh Sharzehi, MD
Portland, OR · $161 in drug and device payments (2025) · Telehealth · (503) 494-2270
Dr. Kellie Young
Portland, OR · $41 in drug and device payments (2025) · Telehealth · (503) 229-7137

Conditions Gastroenterology providers in 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 Oregon?

There are 277 Gastroenterology providers with active NPI records practicing in Oregon, according to federal NPPES data refreshed monthly.

Do Gastroenterology providers in Oregon offer telehealth?

Yes. 123 of the 277 Gastroenterology providers in Oregon (about 44%) report offering telehealth services in CMS data.

Which cities in Oregon have the most Gastroenterology providers?

Portland (135), Springfield (21), Tualatin (18) have the highest concentration of Gastroenterology providers in Oregon.

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

125 of 277 Gastroenterology providers in Oregon (45%) 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 Oregon treat?

Gastroenterology providers 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 counts and profiles 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.

Do most Gastroenterologists in Oregon work in independent practices or large health systems?

Among 175 Gastroenterologists in Oregon enrolled in Medicare, 3% bill through a solo or small practice with fewer than 10 clinicians, 18% through a mid-size group of 10 to 99, and 79% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.

Which hospitals do Gastroenterologists in Oregon work at?

According to CMS facility affiliation records, the Oregon hospitals where the most Gastroenterologists hold privileges are Ohsu Hospital and Clinics in Portland; Providence Portland Medical Center in Portland; Providence St Vincent Medical Center in Portland.

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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. Are you a Gastroenterology in Oregon? Get featured.