Internal Medicine in Clackamas, Oregon
Data updated monthly · Last refresh September 2026
99 Internal Medicine providers practice in Clackamas, and 5% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.
Internal Medicine providers in Clackamas
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. 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 Dr. Joel WomackClackamas, OR · No drug or device payments recorded (2025) ·
(503) 571-3025 Dr. John Woo, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(503) 571-3124 Dr. Joseph Kim, MDClackamas, OR · No drug or device payments recorded (2025) · Telehealth ·
(503) 659-0880 Dr. Joshua Hollabaugh, MDClackamas, OR · No drug or device payments recorded (2025) ·
(971) 710-8240 Dr. Karen MularskiClackamas, OR · No drug or device payments recorded (2025) ·
(503) 571-2880 Dr. Kathryn Landauer, M.D.Clackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Dr. Kelly Probst, DOClackamas, OR · No drug or device payments recorded (2025) ·
(503) 813-2000 Dr. Kirthika Balakrishnan, MDClackamas, OR · No drug or device payments recorded (2025) ·
(503) 652-2880 Conditions Internal Medicine providers in Clackamas, 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 Clackamas, Oregon?There are 99 Internal Medicine providers with active NPI records practicing in Clackamas, according to federal NPPES data refreshed monthly.
How many Internal Medicine providers in Clackamas received drug or device company payments?5 of 99 (5%) 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 Clackamas treat?Internal Medicine providers in Clackamas 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 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 Clackamas Internal Medicine across Oregon