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Oncologists in Wisconsin

Data updated monthly · Last refresh October 2026

69 Medical Oncology providers practice in Wisconsin, including 30 (43%) offering telehealth. The largest concentration is in Madison. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.

69providers
30telehealth
Madisontop city

Medical Oncology by city in Wisconsin

Choose a city to see providers there.

Medical Oncology in Madison27 providers
Medical Oncology in Green Bay10 providers
Medical Oncology in La Crosse8 providers
Medical Oncology in Milwaukee7 providers
Medical Oncology in Eau Claire5 providers
Medical Oncology in Janesville2 providers
Medical Oncology in Verona2 providers
Medical Oncology in Oconomowoc1 providers
Medical Oncology in Franklin1 providers
Medical Oncology in Johnson Creek1 providers
Medical Oncology in Sheboygan1 providers
Medical Oncology in Manitowoc1 providers
Medical Oncology in Brookfield1 providers
Medical Oncology in Frederic1 providers
Medical Oncology in River Falls1 providers

Medical Oncology providers in Wisconsin

Listed by city, largest first. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Robert Hegeman, MD
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 265-1700
Dr. Robert Holland, MD
Madison, WI · No drug or device payments recorded (2025) · (608) 263-7500
Dr. Ryan Denu, MD, PHD
Madison, WI · $141 in drug and device payments (2025) · Telehealth · (608) 915-0100
Dr. Tien Hoang
Madison, WI · No drug or device payments recorded (2025) · (608) 265-1700
Dr. Toby Campbell, M.D., MSCI
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 263-3962
Dr. William Schelman, M.D., PH.D.
Madison, WI · No drug or device payments recorded (2025) · (608) 263-8090
Dr. Lynn Baatz
Manitowoc, WI · No drug or device payments recorded (2025) · (920) 320-2249
Dr. Alexandria Phan, M.D.
Milwaukee, WI · $40,856 in drug and device payments (2025) · Telehealth · (414) 805-0505
Dr. Hui-zi Chen, M.D., PH.D.
Milwaukee, WI · $15,480 in drug and device payments (2025) · Telehealth · (414) 805-4600
Dr. Nicholas Choong, M.D.
Milwaukee, WI · No drug or device payments recorded (2025) · (414) 805-4600
Dr. Paul Ritch, MD
Milwaukee, WI · No drug or device payments recorded (2025) · (414) 805-6800
Dr. Stuart Wong, MD
Milwaukee, WI · No drug or device payments recorded (2025) · Telehealth · (414) 805-6800
Dr. Sumana Devata, MD
Milwaukee, WI · $104 in drug and device payments (2025) · (414) 805-4600
Dr. Zachary Graff, M.D.
Milwaukee, WI · $27 in drug and device payments (2025) · (414) 955-4170
Dr. Paul Lemarbre, M.D.
Oconomowoc, WI · No drug or device payments recorded (2025) · (262) 468-0115
Dr. Gopakumar Nambudiri, MD
River Falls, WI · No drug or device payments recorded (2025) · Telehealth · (715) 307-6430
Dr. Steven Bettag, MD
Sheboygan, WI · $791 in drug and device payments (2025) · (920) 458-7433
Dr. Howard Bailey, MD
Verona, WI · No drug or device payments recorded (2025) · (608) 845-3163
Dr. H Robins, MD PHD
Verona, WI · No drug or device payments recorded (2025) · (608) 263-1416

Common questions

How many Medical Oncology providers are in Wisconsin?

There are 69 Medical Oncology providers with active NPI records practicing in Wisconsin, according to federal NPPES data refreshed monthly.

Do Medical Oncology providers in Wisconsin offer telehealth?

Yes. 30 of the 69 Medical Oncology providers in Wisconsin (about 43%) report offering telehealth services in CMS data.

Which cities in Wisconsin have the most Medical Oncology providers?

Madison (27), Green Bay (10), La Crosse (8) have the highest concentration of Medical Oncology providers in Wisconsin.

How many Medical Oncology providers in Wisconsin received drug or device company payments?

24 of 69 Medical Oncology providers in Wisconsin (35%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

Where does this data come from?

Provider counts and profiles come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

Do most Oncologists in Wisconsin work in independent practices or large health systems?

Among 45 Oncologists in Wisconsin enrolled in Medicare, 0% bill through a solo or small practice with fewer than 10 clinicians, 2% through a mid-size group of 10 to 99, and 98% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.

Which hospitals do Oncologists in Wisconsin work at?

According to CMS facility affiliation records, the Wisconsin hospitals where the most Oncologists hold privileges are University of Wi Hospitals & Clinics Authority in Madison; Mayo Clinic Health System Eau Claire Hospital in Eau Claire; Unitypoint Health - Meriter in Madison.

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Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory. Are you a Medical Oncology in Wisconsin? Get featured.