Internal Medicine Doctors in Oregon
Data updated monthly · Last refresh October 2026
2,115 Internal Medicine providers practice in Oregon, including 402 (19%) 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.
2,115providers
402telehealth
Portlandtop city
Internal Medicine by city in Oregon
Choose a city to see providers there.
Internal Medicine 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. Marc Zenoniani, MDCanby, OR · No drug or device payments recorded (2025) ·
(503) 723-4660 Dr. Melvin Yamase, M.D.Canby, OR · No drug or device payments recorded (2025) ·
(503) 723-4660 Dr. Anandita Tiwari, M.D.Canyonville, OR · $383 in drug and device payments (2025) · Telehealth ·
(541) 839-4211 Dr. Christopher Alftine, MDCentral Point, OR · No drug or device payments recorded (2025) ·
(541) 690-3600 Dr. Daniel Wood, DOCentral Point, OR · $26 in drug and device payments (2025) · Telehealth ·
(541) 732-8000 Dr. John Kolsbun, MDCentral Point, OR · No drug or device payments recorded (2025) ·
(541) 664-5151 Dr. Susan Hansen, MDCentral Point, OR · No drug or device payments recorded (2025) ·
(541) 664-3346 Dr. Jamie Rich, M.D.Chiloquin, OR · No drug or device payments recorded (2025) ·
(541) 882-1487 Dr. Aaron HoClackamas, OR · No drug or device payments recorded (2025) ·
(800) 813-2000 Dr. Albert Oh, MDClackamas, OR · No drug or device payments recorded (2025) · Telehealth ·
(800) 813-2000 Dr. Alexander Kositch, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Dr. Alice Nayak, MDClackamas, OR · No drug or device payments recorded (2025) · Telehealth ·
(503) 215-2110 Dr. Alla Comardelle, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Dr. Andrea Osterlund, DOClackamas, OR · No drug or device payments recorded (2025) ·
(503) 813-2200 Dr. Andrea Veryser, MDClackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Dr. Andrew Felcher, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Dr. Anna Muchnik, DOClackamas, OR · No drug or device payments recorded (2025) ·
(800) 813-2000 Dr. Cara Steinkeler, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Dr. Catherine Gisi, MDClackamas, OR · $53 in drug and device payments (2025) ·
(800) 813-2000 Dr. Cheryl Layne, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Dr. Chieko Misaki, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Dr. Christine Choo, MDClackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Dr. Christopher Clements, MDClackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Dr. Cora Ludwig, MDClackamas, OR · No drug or device payments recorded (2025) ·
(503) 451-1476 Dr. Corinne Klykov, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(316) 558-1388 Dr. Cynthia Chan, MDClackamas, OR · No drug or device payments recorded (2025) ·
(800) 813-2000 Dr. Daniel Lotspeich, MDClackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Dr. Daniel Markowski, MDClackamas, OR · No drug or device payments recorded (2025) ·
(503) 813-2000 Dr. Daniel Sonshine, MDClackamas, OR · No drug or device payments recorded (2025) ·
(564) 248-3538 Dr. Daniel Tamashiro, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(503) 571-0378 Dr. David Shenson, MDClackamas, OR · No drug or device payments recorded (2025) ·
(503) 571-3174 Dr. Derrick Lee, MDClackamas, OR · No drug or device payments recorded (2025) ·
(800) 813-2000 Dr. Diana Mclaurin, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(505) 652-2880 Dr. Elizabeth Frederick-ragsdale, MDClackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Dr. Ella Gillespie, MDClackamas, OR · No drug or device payments recorded (2025) · Telehealth ·
(800) 813-2000 Dr. Eric Wright, MDClackamas, OR · $734 in drug and device payments (2025) · Telehealth ·
(805) 434-3500 Dr. Frank Chen, M.D.Clackamas, OR · $129 in drug and device payments (2025) ·
(503) 652-2880 Dr. Gene Hong, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(503) 657-3329 Dr. George Feldman, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Dr. Gregory Garcia, MDClackamas, OR · No drug or device payments recorded (2025) · Telehealth ·
(503) 215-2110 Dr. Gregory Ruttan, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(800) 813-2000 Dr. Ha Lam, MDClackamas, OR · No drug or device payments recorded (2025) ·
(800) 813-2000 Dr. Hanieh Rad, MDClackamas, OR · No drug or device payments recorded (2025) ·
(800) 813-2000 Dr. James Rood, D.O.Clackamas, OR · No drug or device payments recorded (2025) ·
(503) 813-2000 Dr. James Skavaril, MDClackamas, OR · No drug or device payments recorded (2025) · Telehealth ·
(800) 813-2000 Dr. Jane Chung, MDClackamas, OR · No drug or device payments recorded (2025) ·
(503) 571-8049 Dr. Jason Mannion, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(800) 813-2000 Dr. Jennifer Garnand, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Dr. Jessica Blake Patel, MDClackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Dr. Joel Vanderschuur, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Conditions Internal Medicine providers in Oregon commonly treat
Patients often search by condition rather than specialty. These are conditions typically managed by Internal Medicine providers. Individual practices vary, so confirm with the provider before booking.
- High blood pressure
- Type 2 diabetes
- High cholesterol
- Preventive care
- Chronic disease management
Common questions
How many Internal Medicine providers are in Oregon?There are 2,115 Internal Medicine providers with active NPI records practicing in Oregon, according to federal NPPES data refreshed monthly.
Do Internal Medicine providers in Oregon offer telehealth?Yes. 402 of the 2,115 Internal Medicine providers in Oregon (about 19%) report offering telehealth services in CMS data.
Which cities in Oregon have the most Internal Medicine providers?Portland (895), Corvallis (128), Clackamas (99) have the highest concentration of Internal Medicine providers in Oregon.
How many Internal Medicine providers in Oregon received drug or device company payments?289 of 2,115 Internal Medicine providers in Oregon (14%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
What conditions do Internal Medicine providers in Oregon treat?Internal Medicine providers commonly treat high blood pressure, type 2 diabetes, high cholesterol, preventive care, chronic disease management 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 Internal Medicine Doctors in Oregon work in independent practices or large health systems?Among 1,132 Internal Medicine Doctors in Oregon enrolled in Medicare, 8% bill through a solo or small practice with fewer than 10 clinicians, 14% 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 Internal Medicine Doctors in Oregon work at?According to CMS facility affiliation records, the Oregon hospitals where the most Internal Medicine Doctors hold privileges are Providence St Vincent Medical Center in Portland; Ohsu Hospital and Clinics in Portland; Providence Portland Medical Center in Portland.
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