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Gastroenterologists who accept Medicare in Madison, WI
CMS lists 43 clinicians in this specialty with a practice address in Madison. Accept Medicare assignment (the Medicare-approved amount as full payment): 43. Offer telehealth: 35.
Typical amounts Medicare approves in ZIP 53715 (2024 Medicare rates, the latest CMS has published): a new-patient visit $124, of which you pay about $31; a follow-up visit $95, 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.
Kerstin E. Austin, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2012 · University of Wisconsin School of MedicineFemaleMark E. Benson, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2002 · Geisel School of Medicine at DartmouthMaleOther offices in Madison: 7Antonio Bosch, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1993 · University of Wisconsin School of MedicineMaleOther offices in Madison: 1Siobhan M. Byrne, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2005 · University of Washington School of MedicineFemaleOther offices in Madison: 6Freddy Caldera Jr., DO
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2004 · University of Iowa, RJ & L Carver College of MedicineMaleDrug and device company payments (2025): $20,468Eric A. Gaumnitz, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1989 · University of Kansas School of Med (kc/wich/sal)MaleDrug and device company payments (2025): $121Deepak V. Gopal, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1993MaleGary R. Griglione, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100Graduated 1982MaleOther offices in Madison: 1Ian C. Grimes, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2007 · Southern Illinois University School of MedicineMaleChristopher Lindholm, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2017 · University of Wisconsin School of MedicineMaleOther offices in Madison: 5Gabriela C. Lobato, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2018 · University of Illinois College of Med (chi/peor/rock/chm-Urb)FemaleDrug and device company payments (2025): $35Luis Lomeli, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2011MaleDrug and device company payments (2025): $2,769Michael R. Lucey, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1976MaleOther offices in Madison: 5Bryan L. Magenheim, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100Graduated 1989MaleOther offices in Madison: 1Jessica A. Musto, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2014FemaleOther offices in Madison: 1Kevin B. Patel, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2011MaleVinay L. Patel, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100Graduated 2014 · Wake Forest University School of MedicineMalePatrick R. Pfau, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1994 · Northwestern University Feinberg Medical SchoolMaleOther offices in Madison: 6Drug and device company payments (2025): $242Paulina Phillips, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2011 · Rush Medical College of Rush UniversityFemaleSumona Saha, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2002 · Geisel School of Medicine at DartmouthFemaleOther offices in Madison: 8Drug and device company payments (2025): $2,630Adnan Said, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2003 · University of Wisconsin School of MedicineMaleOther offices in Madison: 5Drug and device company payments (2025): $71,680Mansoor Shariff, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1987 · University of Wisconsin School of MedicineMaleAnurag Soni, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1992MaleDrug and device company payments (2025): $131Peter Stadmeyer, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2015 · Albany Medical College of Union UniversityMaleDrug and device company payments (2025): $131Lisa L. Strate, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1995FemaleOther offices in Madison: 1Arnold Wald, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1968 · State University of New York Downstate Medical CenterMaleOther offices in Madison: 3Jennifer M. Weiss, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2002 · University of Rochester School of Medicine and DentistryFemaleJohn B. Williams, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2000 · Saint Louis University School of MedicineMaleOther offices in Madison: 1Michael L. Allan, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1997 · University of Wisconsin School of MedicineMaleRodrigo A. Castillo, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1989MaleOther offices in Madison: 1Drug and device company payments (2025): $125Geoffrey K. Dang-Vu, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2015 · Rush Medical College of Rush UniversityMaleMatthew W. Ewy, MD
✓ Accepts Medicare assignmentGraduated 2020 · Medical College of WisconsinMaleOther offices in Madison: 1Margarita N. German, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2012FemaleJason E. Gonzaga, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2006 · Loyola University of Chicago, Stritch School of MedicineMaleOther offices in Madison: 4Alexander K. Larson, MD
✓ Accepts Medicare assignmentGraduated 2010MaleAlexander S. Lee, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2016 · Tufts University School of MedicineMaleAbby R. Lochmann-Bailkey, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2013 · Medical College of WisconsinFemalePraveena Narayanan, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2017 · Mayo Medical SchoolFemaleOther offices in Madison: 1Harsh C. Patel, MD
✓ Accepts Medicare assignmentGraduated 2020MaleOther offices in Madison: 1Trevor Schell
✓ Accepts Medicare assignmentGraduated 2020 · Vanderbilt University School of MedicineMaleMarmy Shah, MD
✓ Accepts Medicare assignmentGraduated 2008 · New York Medical CollegeFemaleDrug and device company payments (2025): $37Andrew J. Walker, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2007 · Saint Louis University School of MedicineMaleNaree K. Whang, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2009Female
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 Madison
- Primary care doctors436
- Geriatricians13
- Nurse practitioners580
- Cardiologists80
- Dermatologists38
- Orthopedic surgeons56
- Neurologists88
- Ophthalmologists50
- Optometrists59
- Podiatrists16
- Urologists25
- Pulmonologists52
- Nephrologists12
- Endocrinologists30
- Rheumatologists22
- ENT doctors24
- Oncologists58
- Psychiatrists101
- Psychologists120
- Therapists and counselors440
- Physical therapists95
- Occupational therapists24
- Speech therapists14
- Audiologists21
- Chiropractors52
- Gynecologists67
- General surgeons72
- Vascular surgeons16
- Pain management doctors5
- Physiatrists17
- Allergists14
- Dietitians32
- Neurosurgeons25
- Infectious disease doctors36
Other care in Madison
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).