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Gastroenterologists who accept Medicare in Corvallis, OR
CMS lists 11 clinicians in this specialty with a practice address in Corvallis. Accept Medicare assignment (the Medicare-approved amount as full payment): 11. Offer telehealth: 1.
Typical amounts Medicare approves in ZIP 97330 (2024 Medicare rates, the latest CMS has published): a new-patient visit $126, of which you pay about $32; a follow-up visit $97, of which you pay about $24 — the 20% coinsurance after the yearly Part B deductible. Clinicians who don't accept assignment can charge up to 15% more; with a Medicare Advantage plan, your plan's copay applies instead.
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Order: clinicians who accept assignment first, then by MIPS score (highest first), then by last name.
Keith E. Harris, MD
✓ Accepts Medicare assignmentMIPS score (2024): 96.8/100Graduated 1979 · Howard University College of MedicineMaleOther offices in Corvallis: 1Gregory D. Schwartz, MD
✓ Accepts Medicare assignmentMIPS score (2024): 96.8/100✓ TelehealthGraduated 2000MaleOther offices in Corvallis: 3Matthew M. Walton, MD
✓ Accepts Medicare assignmentMIPS score (2024): 96.8/100Graduated 2002 · Medical University of South Carolina College of MedicineMaleOther offices in Corvallis: 3Shahab Aftahi, MD
✓ Accepts Medicare assignmentGraduated 1985MaleOther offices in Corvallis: 1Drug and device company payments (2025): $275Hsichao Chow, MD
✓ Accepts Medicare assignmentGraduated 1981 · University of California, Davis School of MedicineMaleOther offices in Corvallis: 2Andrei Gasic, MD
✓ Accepts Medicare assignmentGraduated 1986 · Medical College of PennsylvaniaMaleOther offices in Corvallis: 2Drug and device company payments (2025): $100Shivani Gupta, MD
✓ Accepts Medicare assignmentGraduated 2013 · Emory University School of MedicineFemaleThomas P. Huber, MD
✓ Accepts Medicare assignmentGraduated 1979MaleOther offices in Corvallis: 3Jonathan Lin, MD
✓ Accepts Medicare assignmentGraduated 2003 · Drexel University College of MedicineMaleOther offices in Corvallis: 1Drug and device company payments (2025): $247Khoi M. Tran, MD
✓ Accepts Medicare assignmentGraduated 1990 · University of California, Irvine, California College of MedicineMaleOther offices in Corvallis: 1Drug and device company payments (2025): $120Surinder M. Vasdev, MD
✓ Accepts Medicare assignmentGraduated 1984MaleOther offices in Corvallis: 2
Before you book
This list comes from Medicare's enrollment records, not from reviews. Call the office to confirm the clinician is taking new Medicare patients. With Original Medicare, a clinician who accepts assignment can only charge you the Medicare deductible and coinsurance; one who doesn't may charge up to 15% more than the Medicare-approved amount. If you have a Medicare Advantage plan, check that the clinician is in the plan's network.
The MIPS final score (0–100) comes from Medicare's Merit-based Incentive Payment System for 2024. It combines quality measures, cost, improvement activities and use of certified health records, and it sets a payment adjustment. Clinicians who report as a group share the group's score. It is not a patient rating, and many clinicians have no published score.
Payments from drug and medical device companies come from CMS Open Payments (2025 general payments: meals, travel, consulting and speaking fees, gifts and similar), summed for each clinician. Receiving payments is legal and common and does not mean a clinician did anything wrong.
Other specialists in Corvallis
- Primary care doctors156
- Nurse practitioners50
- Cardiologists11
- Dermatologists11
- Orthopedic surgeons15
- Neurologists5
- Ophthalmologists5
- Optometrists13
- Urologists6
- Endocrinologists3
- Rheumatologists3
- Oncologists10
- Psychiatrists24
- Psychologists29
- Therapists and counselors51
- Physical therapists81
- Occupational therapists8
- Chiropractors11
- Gynecologists12
- General surgeons10
- Dietitians6
- Neurosurgeons5
Other care in Corvallis
Hospitals · Nursing homes · Dialysis centers · Home health agencies · Hospices
Nearby cities
Enrollment, addresses and scores are as reported to CMS and can change. This is not a list of in-network providers for any Medicare Advantage plan, and it is not medical advice. Source: CMS Provider Data Catalog — Doctors and Clinicians National Downloadable File, Clinician MIPS Performance 2024 and Facility Affiliation Data (released Oct 2, 2026).