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Infectious disease doctors who accept Medicare in Madison, WI
CMS lists 36 clinicians in this specialty with a practice address in Madison. Accept Medicare assignment (the Medicare-approved amount as full payment): 36. Offer telehealth: 28.
Typical amounts Medicare approves in ZIP 53792 (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.
David R. Andes, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1992MaleOther offices in Madison: 2Drug and device company payments (2025): $6,720Meghan B. Brennan, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2006 · University of Vermont College of MedicineFemaleChristopher J. Crnich, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1997 · Rush Medical College of Rush UniversityMaleOther offices in Madison: 2Gregory M. Gauthier, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1999 · Ohio State University College of MedicineMaleOther offices in Madison: 5Ambar Haleem, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1999FemaleEric C. Johannsen, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100Graduated 1995 · Harvard Medical SchoolMaleMichael A. Kessler, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2015 · University of Wisconsin School of MedicineMaleOther offices in Madison: 1Benjamin G. Ladner, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2016 · University of Missouri, Columbia School of MedicineMaleAlexander J. Lepak, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100Graduated 2005 · University of Wisconsin School of MedicineMaleDrug and device company payments (2025): $22Dennis Maki
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100Graduated 1967 · University of Wisconsin School of MedicineMaleOther offices in Madison: 3Justin Massey, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2018 · University of Wisconsin School of MedicineMaleKristine M. Matson, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2001 · University of Minnesota Medical SchoolFemaleJoseph A. McBride, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2010 · Loyola University of Chicago, Stritch School of MedicineMaleJeniel E. Nett, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2003FemaleCaitlin S. Pepperell, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1999FemaleOther offices in Madison: 1Aurora Pop-Vicas, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2000 · Emory University School of MedicineFemaleChristopher M. Saddler, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2011 · Wayne State University School of MedicineMaleOther offices in Madison: 1Nasia Safdar, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100Graduated 1995FemaleMichael J. Scolarici, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2019 · Saint Louis University School of MedicineMaleDawd S. Siraj, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1991MaleDrug and device company payments (2025): $364Jeannina A. Smith, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1999 · University of Wisconsin School of MedicineFemaleOther offices in Madison: 2Robert T. Striker
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 1995 · Washington University School of MedicineMaleOther offices in Madison: 6Drug and device company payments (2025): $8,129Jessica S. Tischendorf, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100✓ TelehealthGraduated 2013 · University of Wisconsin School of MedicineFemaleRyan Westergaard, MD
✓ Accepts Medicare assignmentMIPS score (2024): 83.3/100Graduated 2004 · Johns Hopkins University School of MedicineMaleKelly Biermann, DO
✓ Accepts Medicare assignmentGraduated 2021FemaleAmanda S. Carlson, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2007FemaleKevin Gregg, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2004MaleGarry Jean Louis, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1990MaleOther offices in Madison: 4Swapnil S. Lanjewar, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2011MaleMikyung Lee, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2000 · University of Wisconsin School of MedicineFemaleOther offices in Madison: 1Heather M. Machkovech, MD
✓ Accepts Medicare assignmentGraduated 2020 · University of Washington School of MedicineFemaleMark M. Mounajjed, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1993MaleAmmar F. Nasrallah, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 1999MaleOther offices in Madison: 4Alison Schwartz Vaneperen, DO
✓ Accepts Medicare assignment✓ TelehealthGraduated 2011 · Lake Erie College of Osteopathic Medicine, ErieFemaleOther offices in Madison: 4Braden M. Sciarra-Fischer, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2019 · Indiana University School of MedicineMaleJohn V. Williams, MD
✓ Accepts Medicare assignmentGraduated 1994 · Virginia Commonwealth University, School of MedicineMale
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
- Gastroenterologists43
- 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
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).