Pediatric Gastroenterologists in Oregon
Data updated monthly · Last refresh October 2026
23 Pediatric Gastroenterology providers practice in Oregon. 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.
23providers
Portlandtop city
Where Pediatric Gastroenterologists in Oregon practice
From CMS Medicare enrollment records covering 3 of the 23 providers listed here (13%). Providers who do not bill Medicare are not included in these figures.
Largest practice groups
| Group (as registered with Medicare) | Pediatric Gastroenterologists | All clinicians in group | Main city |
| University Professional Services | 2 | 1,683 | Eugene |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
Pediatric 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. Albert Shan, M.D.Portland, OR · No drug or device payments recorded (2025) ·
(503) 494-8311 Dr. Amanda Lee, M.D.Portland, OR · No drug or device payments recorded (2025) ·
(954) 612-5896 Dr. Amy Tsai, M.D.Portland, OR · No drug or device payments recorded (2025) ·
(503) 216-6050 Dr. Anna Hunter, MDPortland, OR · $26 in drug and device payments (2025) ·
(503) 494-1078 Dr. Annie Terry, MDPortland, OR · No drug or device payments recorded (2025) ·
(503) 494-1078 Dr. Ariel Porto, MDPortland, OR · $816 in drug and device payments (2025) ·
(503) 418-5751 Dr. Emily Whitfield, M.D.Portland, OR · No drug or device payments recorded (2025) ·
(503) 418-5751 Dr. Gillian Lam, M.D.Portland, OR · No drug or device payments recorded (2025) ·
(503) 346-0640 Dr. Henry Lin, MDPortland, OR · No drug or device payments recorded (2025) ·
(503) 418-5751 Dr. Hillary BashawPortland, OR · $10,921 in drug and device payments (2025) ·
(503) 418-5751 Dr. Jacqueline Try, M.D.Portland, OR · No drug or device payments recorded (2025) ·
(503) 346-0640 Dr. Kathryn Moyer, M.D.Portland, OR · $183 in drug and device payments (2025) ·
(503) 281-5139 Dr. Kenneth Cox, MDPortland, OR · No drug or device payments recorded (2025) ·
(650) 723-5070 Dr. Kent Rosenwald, M.D.Portland, OR · No drug or device payments recorded (2025) ·
(503) 276-6138 Dr. Kimberly Trieschmann, M.D.Portland, OR · No drug or device payments recorded (2025) ·
(503) 494-3186 Dr. Kristina Leinwand, D.O.Portland, OR · $18,346 in drug and device payments (2025) ·
(503) 280-2898 Dr. Matthew Riley, MDPortland, OR · No drug or device payments recorded (2025) ·
(503) 281-5139 Dr. Melissa Sheiko, M.D.Portland, OR · $48 in drug and device payments (2025) ·
(503) 281-5139 Dr. Mikelle Bassett, MDPortland, OR · No drug or device payments recorded (2025) ·
(503) 418-5751 Dr. Raghu Varier, D.O.Portland, OR · $44 in drug and device payments (2025) ·
(503) 281-5139 Dr. Ramya Ramraj, M.DPortland, OR · No drug or device payments recorded (2025) ·
(800) 813-2000 Dr. Sylvia DoanPortland, OR · No drug or device payments recorded (2025) ·
(503) 418-5751 Dr. William Marshall, MDPortland, OR · No drug or device payments recorded (2025) ·
(503) 281-5139 Common questions
How many Pediatric Gastroenterology providers are in Oregon?There are 23 Pediatric Gastroenterology providers with active NPI records practicing in Oregon, according to federal NPPES data refreshed monthly.
Which cities in Oregon have the most Pediatric Gastroenterology providers?Portland (23) have the highest concentration of Pediatric Gastroenterology providers in Oregon.
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.
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