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Oncologists who accept Medicare in Waukesha, WI
CMS lists 7 clinicians in this specialty with a practice address in Waukesha. Accept Medicare assignment (the Medicare-approved amount as full payment): 7. Offer telehealth: 5.
Typical amounts Medicare approves in ZIP 53188 (2024 Medicare rates, the latest CMS has published): a new-patient visit $163, of which you pay about $41; 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.
Christopher R. Hake, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2002 · Medical College of WisconsinMaleOther offices in Waukesha: 4Drug and device company payments (2025): $20Kathleen S. Hemauer, MD
✓ Accepts Medicare assignmentGraduated 2014 · Medical College of WisconsinFemaleDrug and device company payments (2025): $21Jonathan Kapke, DO
✓ Accepts Medicare assignment✓ TelehealthGraduated 2013MaleAriel A. Kleman, MD
✓ Accepts Medicare assignmentGraduated 2015FemaleDrug and device company payments (2025): $123Mohammad A. Raza, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2006 · George Washington University School of MedicineMaleOther offices in Waukesha: 5Derek Serna, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2005 · Medical College of WisconsinMaleDrug and device company payments (2025): $60Timothy R. Wassenaar, MD
✓ Accepts Medicare assignment✓ TelehealthGraduated 2002MaleOther offices in Waukesha: 4
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 Waukesha
- Primary care doctors140
- Nurse practitioners202
- Cardiologists31
- Dermatologists11
- Neurologists9
- Gastroenterologists13
- Ophthalmologists14
- Optometrists17
- Podiatrists7
- Urologists8
- Pulmonologists12
- Nephrologists9
- Endocrinologists3
- Rheumatologists6
- ENT doctors10
- Psychiatrists17
- Psychologists31
- Therapists and counselors144
- Physical therapists39
- Occupational therapists8
- Speech therapists4
- Audiologists11
- Chiropractors25
- Gynecologists26
- General surgeons17
- Pain management doctors4
- Physiatrists5
- Neurosurgeons3
- Infectious disease doctors5
Other care in Waukesha
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).