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Gastroenterologists who accept Medicare in Green Bay, WI
CMS lists 26 clinicians in this specialty with a practice address in Green Bay. Accept Medicare assignment (the Medicare-approved amount as full payment): 26. Offer telehealth: 7.
Typical amounts Medicare approves in ZIP 54311 (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.
Vikas Khullar, MD
✓ Accepts Medicare assignmentMIPS score (2024): 94.8/100Graduated 2012MaleDrug and device company payments (2025): $740Mark Laukka, MD
✓ Accepts Medicare assignmentMIPS score (2024): 94.8/100Graduated 1988 · University of Michigan Medical SchoolMaleDrug and device company payments (2025): $2,116Chaitanya Pant, MD
✓ Accepts Medicare assignmentMIPS score (2024): 94.8/100Graduated 2006MaleDrug and device company payments (2025): $1,414Marla Z. Wolfert, MD
✓ Accepts Medicare assignmentMIPS score (2024): 94.8/100Graduated 2008 · University of Wisconsin School of MedicineFemaleClaus J. Fimmel, MD
✓ Accepts Medicare assignmentMIPS score (2024): 84.9/100Graduated 1981MaleDrug and device company payments (2025): $883Parul D. Agarwal, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2004FemalePaulina Phillips, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2011 · Rush Medical College of Rush UniversityFemaleAndrew Albert, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2001 · George Washington University School of MedicineMaleDrug and device company payments (2025): $5,031Ahmad Alkaddour, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2009MaleMuhammad Alsayid, MD
✓ Accepts Medicare assignmentGraduated 2009MaleDrug and device company payments (2025): $1,085Kanwar S. Arora, MD
✓ Accepts Medicare assignmentGraduated 1989MaleOther offices in Green Bay: 1John Bosco, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1988 · University of Connecticut School of MedicineMaleSwati Chaudhari, MD
✓ Accepts Medicare assignmentGraduated 1998 · Rutgers New Jersey Medical SchoolFemaleOther offices in Green Bay: 1Bogdan Cristescu, MD
✓ Accepts Medicare assignmentGraduated 1996MaleAlexandra Guillaume, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2006 · Tufts University School of MedicineFemaleDrug and device company payments (2025): $718Lauren Johnson, MD
✓ Accepts Medicare assignmentGraduated 2018 · R Franklin University of Med & Sci/chicago Medical SchoolFemaleDrug and device company payments (2025): $150Neil Kapil, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2017 · University of Missouri, Kansas City, School of MedicineMaleDrug and device company payments (2025): $180Matthew B. Kaspar, MD
✓ Accepts Medicare assignmentGraduated 2010 · University of Texas Medical School at San AntonioMaleOther offices in Green Bay: 1Drug and device company payments (2025): $241David A. Knuff, MD
✓ Accepts Medicare assignmentGraduated 2000 · Wayne State University School of MedicineMaleOther offices in Green Bay: 1Michael I. Maitar, MD
✓ Accepts Medicare assignmentGraduated 1986MaleOther offices in Green Bay: 2Drug and device company payments (2025): $881Chinyere M. Nwosu, DO
✓ Accepts Medicare assignmentGraduated 2007 · New York College of Osteo Medicine of New York Institute of TechnologyFemaleDrug and device company payments (2025): $695Kandarp R. Patel, DO
✓ Accepts Medicare assignmentGraduated 2003 · Touro Un College of Osteopathic Medicine, VallejoMaleDrug and device company payments (2025): $21Syed M. Rizvi, MD
✓ Accepts Medicare assignmentGraduated 1999MaleDrug and device company payments (2025): $109Rajesh Sharma, MD
✓ Accepts Medicare assignmentGraduated 1986MaleDavid A. Stampfl, MD
✓ Accepts Medicare assignmentGraduated 1984 · Boston University School of MedicineMaleOther offices in Green Bay: 1Drug and device company payments (2025): $125Peter Stanko, MD
✓ Accepts Medicare assignmentGraduated 1998 · Medical College of WisconsinMaleOther offices in Green Bay: 1
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 Green Bay
- Primary care doctors199
- Nurse practitioners440
- Cardiologists47
- Dermatologists8
- Orthopedic surgeons67
- Neurologists32
- Ophthalmologists23
- Optometrists45
- Podiatrists9
- Urologists15
- Pulmonologists14
- Nephrologists17
- Endocrinologists7
- Rheumatologists14
- ENT doctors13
- Oncologists22
- Psychiatrists30
- Psychologists17
- Therapists and counselors164
- Physical therapists166
- Occupational therapists39
- Speech therapists10
- Audiologists16
- Chiropractors51
- Gynecologists38
- General surgeons31
- Vascular surgeons7
- Pain management doctors7
- Physiatrists20
- Allergists9
- Sleep medicine doctors5
- Dietitians18
- Neurosurgeons15
- Infectious disease doctors10
Other care in Green Bay
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).