Roman W. Mandzij, DO

Medicare activity in 2024

Official CMS public-use data for Roman W. Mandzij, 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. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)528 services
2. Insertion of needle into vein for collection of blood sample (36415)290 services
3. 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)117 services
4. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)95 services
5. Administration of influenza virus vaccine (G0008)72 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 pressure61%
• High cholesterol50%
• Arthritis36%
• Anxiety21%
• Ischemic heart disease18%
• Osteoporosis16%

Hospitals where Roman W. Mandzij works

Medicare's Facility Affiliation Data lists Roman W. Mandzij 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.

• Northshore University Healthsystem - Evanston HospitalEvanston, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140010
• Swedish HospitalChicago, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140114

Practice locations

Addresses where Roman W. Mandzij is enrolled with Medicare (CMS data updated October 2, 2026).

• 525 Winnetka AveWinnetka, IL 60093 (847) 501‑4060
• 525 Winnetka Ave, Suite 5Winnetka, IL 60093

Group practices

Medicare enrollment lists Roman W. Mandzij as a member of this group (CMS data updated October 2, 2026).

• Winnetka Avenue Physicians SC2 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Illinois →

Other internal medicine doctors in Winnetka

Clinicians with the same Medicare primary specialty in Winnetka, IL — not a recommendation.

• Alexander M. Wind, MD
• Santiago A. Candocia, MD
• Anat A. Lansky, MD
• Victoria M. Trendafilova, MD
• Richard D. Stern, MD
• Robin M. Wind, MD
• David R. Donnersberger, MD
• John E. Croghan, MD

All internal medicine doctors in Winnetka →

Other clinicians in Winnetka Avenue Physicians SC

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

• Thomas A. Stern, 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