Janet M. Retseck, MD

Medicare activity in 2024

Official CMS public-use data for Janet M. Retseck, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)20 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
• High blood pressure59%
• High cholesterol50%
• Arthritis50%

Hospitals where Janet M. Retseck works

Medicare's Facility Affiliation Data lists Janet M. Retseck at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Bellin Memorial HospitalGreen Bay, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520049
• Community Memorial HospitalMenomonee Falls, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520103
• Froedtert Community HospitalNew Berlin, WI · Acute Care Hospital · Emergency services: listed by Medicare · CCN 520213
• Froedtert Memorial Lutheran HospitalMilwaukee, WI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 520177

Practice locations

Addresses where Janet M. Retseck is enrolled with Medicare (CMS data updated October 2, 2026).

• 8701 W Watertown PlankMilwaukee, WI 53226 (414) 805‑3666
• 8701 Watertown Plank Rd, Room 4041 MfrcMilwaukee, WI 53226 (414) 805‑3666

Group practices

Medicare enrollment lists Janet M. Retseck as a member of this group (CMS data updated October 2, 2026).

• The Medical College of Wisconsin Inc2,115 clinicians in the group

Specialties

• Hematology/Oncologyprimary

Find other Hematology/Oncology doctors in Wisconsin →

Other hematologist-oncologists in Milwaukee

Clinicians with the same Medicare primary specialty in Milwaukee, WI — not a recommendation.

• Syed A. Hassan, MD
• Guru Subramanian Guru Murthy, MD
• Maria Georgen, MD
• Magdalena Flejsierowicz, MD
• Richard E. Nora, MD
• Marcelo Pasquini, MD
• Sayed Mehdi H. Hamadani, MD
• Thomas A. Giever, DO

All hematologist-oncologists in Milwaukee →

Other clinicians in The Medical College of Wisconsin Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Keri S. Chaney, MD
• Alexandra E. Frunza, NP
• Ahmed Z. Obeidat
• Jennifer D. Bruening, MD
• Jennifer C. Mackinnon, MD
• Rachel K. Bernard, MD

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians