Timothy J. Ziemlewicz, MD

Medicare activity in 2024

Official CMS public-use data for Timothy J. Ziemlewicz, 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. Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)3,816 services
2. Ct scan of abdomen and pelvis with contrast (74177)239 services
3. X-ray of abdomen, 1 view (74018)133 services
4. Mri scan of abdomen before and after contrast (74183)92 services
5. Injection, gadopiclenol, 1 ml (A9573)89 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).

• High blood pressure75%
• High cholesterol68%
• Arthritis41%
• Anxiety38%
• Diabetes34%
• Chronic kidney disease32%

Hospitals where Timothy J. Ziemlewicz works

Medicare's Facility Affiliation Data lists Timothy J. Ziemlewicz 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.

• UnityPoint Health - MeriterMadison, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520089
• University of WI Hospitals & Clinics AuthorityMadison, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520098

Practice locations

Addresses where Timothy J. Ziemlewicz is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.

• 1 S Park StMadison, WI 53715 (608) 287‑2000
• 4602 Eastpark BlvdMadison, WI 53718 (608) 440‑6400
• 4621 Eastpark BlvdMadison, WI 53718 (608) 914‑0100
• 600 Highland AveMadison, WI 53792 (608) 263‑8328
• 6001 Research Park BlvdMadison, WI 53719 (608) 232‑3171

Group practices

Medicare enrollment lists Timothy J. Ziemlewicz as a member of these groups (CMS data updated October 2, 2026).

• University of Wisconsin Medical Foundation Inc2,553 clinicians in the group
• Group Health Cooperative of South Central Wisconsin236 clinicians in the group
• University of Wisconsin System Non Payroll109 clinicians in the group

Specialties

• Diagnostic Radiologyprimary

Find other Diagnostic Radiology doctors in Wisconsin →

Other radiologists in Madison

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

• Alexander R. Moeller, MD
• Minnie W. Kieler, MD
• Brian F. Mullan, MD
• Andrew L. Wentland, MD
• Giuseppe V. Toia, MD
• Allison M. Grayev, MD
• Steven H. Falconer, MD
• Andrew N. Laczniak, MD

All radiologists in Madison →

Other clinicians in University of Wisconsin Medical Foundation Inc

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

• Robert E. Shaw, MD
• Teresa K. Reed
• Peter Kleinschmidt, MD
• Kemin Fena, MD
• T M. Nork, MD
• James E. Svenson, 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