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Gastroenterologists who accept Medicare in Washington, MO
CMS lists 10 clinicians in this specialty with a practice address in Washington. Accept Medicare assignment (the Medicare-approved amount as full payment): 10. Offer telehealth: 1.
Typical amounts Medicare approves in ZIP 63090 (2024 Medicare rates, the latest CMS has published): a new-patient visit $122, of which you pay about $30; a follow-up visit $93, of which you pay about $23 — 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.
Gary D. Koenig, MD
✓ Accepts Medicare assignmentMIPS score (2024): 86.4/100Graduated 1986 · Saint Louis University School of MedicineMaleDrug and device company payments (2025): $1,612Soumojit Ghosh, MD
✓ Accepts Medicare assignmentMIPS score (2024): 84.9/100Graduated 2018MaleDrug and device company payments (2025): $1,842Carl F. Blatt Jr., MD
✓ Accepts Medicare assignmentGraduated 1980 · Georgetown University School of MedicineMaleDrug and device company payments (2025): $103Michael Dahip, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2016MaleDrug and device company payments (2025): $45Erica T. Dailey, DO
✓ Accepts Medicare assignmentGraduated 2014 · Nova Southeastern College of Osteo MedicineFemaleDrug and device company payments (2025): $2,429Nicholas W. Frederickson
✓ Accepts Medicare assignmentGraduated 2010 · Saint Louis University School of MedicineMaleDrug and device company payments (2025): $27Milton Ochieng', MD
✓ Accepts Medicare assignmentGraduated 2008 · Vanderbilt University School of MedicineMaleJohn R D. Peterson, MD
✓ Accepts Medicare assignmentGraduated 2006 · Tulane University School of MedicineMaleDrug and device company payments (2025): $29Sheetal Sharma, MD
✓ Accepts Medicare assignmentGraduated 2004MaleDrug and device company payments (2025): $123Michael J. Zerega, MD
✓ Accepts Medicare assignmentGraduated 1997 · Washington University School of MedicineMaleDrug and device company payments (2025): $289
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 Washington
- Primary care doctors55
- Nurse practitioners90
- Cardiologists12
- Dermatologists3
- Orthopedic surgeons17
- Ophthalmologists6
- Optometrists11
- Podiatrists4
- Pulmonologists3
- Nephrologists4
- Oncologists8
- Therapists and counselors12
- Physical therapists34
- Occupational therapists27
- Speech therapists11
- Audiologists4
- Chiropractors8
- Gynecologists9
- General surgeons10
- Vascular surgeons3
- Pain management doctors3
- Dietitians3
- Neurosurgeons6
Other care in Washington
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).