Hematologists and Oncologists in Wisconsin
Data updated monthly · Last refresh October 2026
301 Hematology & Oncology providers practice in Wisconsin, including 141 (47%) offering telehealth. The largest concentration is in Milwaukee. 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.
301providers
141telehealth
Milwaukeetop city
Hematology & Oncology by city in Wisconsin
Choose a city to see providers there.
Where Hematologists and Oncologists in Wisconsin practice
From CMS Medicare enrollment records covering 201 of the 301 providers listed here (67%). Providers who do not bill Medicare are not included in these figures.
1%solo or small practice (under 10 clinicians)
2%mid-size group (10 to 99)
97%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Hematologists and Oncologists | All clinicians in group | Main city |
| The Medical College of Wisconsin Inc. | 49 | 2,092 | Milwaukee |
| Aurora Health Care Metro, Inc.. | 29 | 75 | Milwaukee |
| Aurora Advanced Healthcare, Inc.. | 25 | 1,107 | Milwaukee |
| University of Wisconsin Medical Foundation Inc. | 24 | 2,537 | Madison |
| Aurora Medical Group, Inc.. | 16 | 3,764 | Milwaukee |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Hematologists and Oncologists affiliated |
| Froedtert Memorial Lutheran Hospital | Milwaukee | Nonprofit | 3 of 5 | 55 |
| Aurora St Lukes Medical Center | Milwaukee | Nonprofit | 4 of 5 | 37 |
| University of Wi Hospitals & Clinics Authority | Madison | Government | 5 of 5 | 25 |
| Community Memorial Hospital | Menomonee Falls | Nonprofit | 4 of 5 | 20 |
| St Josephs Community Hospital West Bend | West Bend | Nonprofit | 4 of 5 | 15 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
Hematology & 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. Amir BistaAppleton, WI · No drug or device payments recorded (2025) ·
(920) 364-3600 Dr. Avi Bar-lev, M.D.Appleton, WI · No drug or device payments recorded (2025) ·
(920) 749-1171 Dr. Demytra Mihailidis, MDAppleton, WI · $627 in drug and device payments (2025) ·
(920) 364-3600 Dr. Edgard Badine, MDAppleton, WI · No drug or device payments recorded (2025) ·
(920) 735-7300 Dr. Joyce Philip, M.D.Appleton, WI · $5,272 in drug and device payments (2025) · Telehealth ·
(920) 364-3600 Dr. Nelida Sjak-shie, PHD MDAppleton, WI · No drug or device payments recorded (2025) ·
(920) 735-7300 Dr. Shannon SchmidtAppleton, WI · No drug or device payments recorded (2025) ·
(920) 364-3600 Dr. Sindhu Singh, MDAppleton, WI · No drug or device payments recorded (2025) ·
(920) 364-3600 Dr. William Guenther, M.D.Appleton, WI · No drug or device payments recorded (2025) ·
(920) 749-1171 Dr. Yazhini Vallatharasu, MDAppleton, WI · $5,376 in drug and device payments (2025) ·
(920) 364-3600 Dr. Edward Nabrinsky, M.D.Beloit, WI · $6,706 in drug and device payments (2025) · Telehealth ·
(608) 364-5253 Dr. Walter Vogel, MDBeloit, WI · No drug or device payments recorded (2025) ·
(608) 364-1460 Dr. Robert Geller, MDBerlin, WI · $21,050 in drug and device payments (2025) ·
(920) 361-6360 Dr. Stephen Strother, M.D.Brookfield, WI · No drug or device payments recorded (2025) ·
(262) 780-4111 Dr. Shamsuddin Virani, M.D.Burlington, WI · No drug or device payments recorded (2025) · Telehealth ·
(262) 767-6020 Dr. Apoorva Jayarangaiah, M.DEau Claire, WI · No drug or device payments recorded (2025) ·
(920) 496-4700 Dr. Atif Khan, M.DEau Claire, WI · $195 in drug and device payments (2025) ·
(715) 858-6767 Dr. Matthew Folstad, MDEau Claire, WI · $83 in drug and device payments (2025) · Telehealth ·
(715) 838-5222 Dr. Ola Kanj Ahmed, MDEau Claire, WI · No drug or device payments recorded (2025) · Telehealth ·
(715) 838-5222 Dr. Patcharin Tanawattanacharoen, MDEau Claire, WI · No drug or device payments recorded (2025) · Telehealth ·
(715) 858-6767 Dr. Rathnamitreyee Vegunta, MDEau Claire, WI · $122 in drug and device payments (2025) · Telehealth ·
(715) 858-6767 Dr. Sameer Batoo, MBBSEau Claire, WI · $188 in drug and device payments (2025) · Telehealth ·
(715) 838-5222 Dr. Vidya Kollu, M.D.Eau Claire, WI · No drug or device payments recorded (2025) ·
(715) 858-4500 Dr. Eugene Lambert, MDFond Du Lac, WI · No drug or device payments recorded (2025) ·
(920) 926-4100 Dr. Michael Jones, MDFond Du Lac, WI · No drug or device payments recorded (2025) ·
(920) 926-4100 Dr. Sameer Tolay, MDFond Du Lac, WI · No drug or device payments recorded (2025) ·
(920) 926-4100 Dr. Jonathan Treisman, M. D.Franklin, WI · $427 in drug and device payments (2025) ·
(414) 427-2360 Dr. Jacob Adashek, DOGermantown, WI · No drug or device payments recorded (2025) · Telehealth ·
(262) 532-9755 Dr. Timothy Goggins, M.D.Germantown, WI · $164 in drug and device payments (2025) · Telehealth ·
(262) 535-8400 Dr. Howard Dubner, MDGlendale, WI · No drug or device payments recorded (2025) ·
(414) 906-4400 Dr. John Maul, MDGrafton, WI · $32 in drug and device payments (2025) · Telehealth ·
(262) 857-5750 Dr. Justin Chau, M.D.Grafton, WI · No drug or device payments recorded (2025) · Telehealth
Dr. Maria GeorgenGrafton, WI · $200 in drug and device payments (2025) · Telehealth ·
(262) 329-5000 Dr. Peter Polewski, MDGrafton, WI · No drug or device payments recorded (2025) · Telehealth ·
(262) 329-1000 Dr. Thomas Zukowski, MDGrafton, WI · No drug or device payments recorded (2025) · Telehealth ·
(262) 329-5000 Dr. Amritha Karkera, M.D.Green Bay, WI · No drug or device payments recorded (2025) · Telehealth ·
(920) 288-8000 Dr. Anjali Budhathoki, M.DGreen Bay, WI · $4,101 in drug and device payments (2025) ·
(920) 435-8326 Dr. Anthony Jaslowski, M.D.Green Bay, WI · $292 in drug and device payments (2025) ·
(920) 884-3135 Dr. Bradley Heraly, M.D.Green Bay, WI · $354 in drug and device payments (2025) ·
(920) 884-3135 Dr. Brian Burnette, MDGreen Bay, WI · No drug or device payments recorded (2025) ·
(920) 432-6049 Dr. Demet Gokalp Yasar, M.D.Green Bay, WI · $230 in drug and device payments (2025) · Telehealth ·
(920) 288-4180 Dr. Harsha Poola, M.DGreen Bay, WI · No drug or device payments recorded (2025) ·
(920) 498-4200 Dr. Jerry Winkler, M.D.Green Bay, WI · $472 in drug and device payments (2025) · Telehealth ·
(920) 884-3135 Dr. Jules Blank, M.D.Green Bay, WI · No drug or device payments recorded (2025) ·
(920) 884-3135 Dr. Kevin Mortara, MDGreen Bay, WI · No drug or device payments recorded (2025) ·
(920) 435-8326 Dr. Matthew Ryan, M.D.Green Bay, WI · $64 in drug and device payments (2025) ·
(920) 884-3135 Dr. Michael Volk, M.D.Green Bay, WI · $140 in drug and device payments (2025) ·
(920) 884-3135 Dr. Mu LiGreen Bay, WI · No drug or device payments recorded (2025) · Telehealth ·
(920) 288-4180 Dr. Nirav Patel, M.DGreen Bay, WI · No drug or device payments recorded (2025) · Telehealth ·
(920) 288-5400 Dr. Paul Koch, M.D.Green Bay, WI · No drug or device payments recorded (2025) ·
(920) 593-3938 Conditions Hematology & Oncology providers in Wisconsin commonly treat
Patients often search by condition rather than specialty. These are conditions typically managed by Hematology & Oncology providers. Individual practices vary, so confirm with the provider before booking.
- Breast cancer
- Lung cancer
- Lymphoma
- Leukemia
- Anemia
- Blood disorders
Common questions
How many Hematology & Oncology providers are in Wisconsin?There are 301 Hematology & Oncology providers with active NPI records practicing in Wisconsin, according to federal NPPES data refreshed monthly.
Do Hematology & Oncology providers in Wisconsin offer telehealth?Yes. 141 of the 301 Hematology & Oncology providers in Wisconsin (about 47%) report offering telehealth services in CMS data.
Which cities in Wisconsin have the most Hematology & Oncology providers?Milwaukee (102), Madison (52), Green Bay (18) have the highest concentration of Hematology & Oncology providers in Wisconsin.
How many Hematology & Oncology providers in Wisconsin received drug or device company payments?139 of 301 Hematology & Oncology providers in Wisconsin (46%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
What conditions do Hematology & Oncology providers in Wisconsin treat?Hematology & Oncology providers commonly treat breast cancer, lung cancer, lymphoma, leukemia, anemia and related conditions. Individual practices vary, so confirm with the provider before booking.
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 Hematologists and Oncologists in Wisconsin work in independent practices or large health systems?Among 201 Hematologists and Oncologists in Wisconsin enrolled in Medicare, 1% bill through a solo or small practice with fewer than 10 clinicians, 2% through a mid-size group of 10 to 99, and 97% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Hematologists and Oncologists in Wisconsin work at?According to CMS facility affiliation records, the Wisconsin hospitals where the most Hematologists and Oncologists hold privileges are Froedtert Memorial Lutheran Hospital in Milwaukee; Aurora St Lukes Medical Center in Milwaukee; University of Wi Hospitals & Clinics Authority in Madison.
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