Markian Iwaszko, MD

Medicare activity in 2024

Official CMS public-use data for Markian Iwaszko, 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 low level od decision making, if using time, 20 minutes or more (99213)100 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)57 services
3. Ultrasound measurement of bladder capacity after voiding (51798)48 services
4. Diagnostic exam of bladder and urethra using an endoscope (52000)45 services
5. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)36 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 cholesterol75%
• Arthritis44%
• Chronic kidney disease41%
• Diabetes35%
• Ischemic heart disease32%

Hospitals where Markian Iwaszko works

Medicare's Facility Affiliation Data lists Markian Iwaszko 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.

• Bronson Methodist HospitalKalamazoo, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230017
• Mercy Health Saint Mary'sGrand Rapids, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230059
• Sheridan Community HospitalSheridan, MI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 231312
• Spectrum HealthGrand Rapids, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230038
• University of Michigan Health - WestWyoming, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230236

Practice locations

Addresses where Markian Iwaszko is enrolled with Medicare (CMS data updated October 2, 2026).

• 1000 E Paris Ave SE, Suite 230Grand Rapids, MI 49546 (616) 949‑4340
• 1535 Gull Rd, Suite 150Kalamazoo, MI 49048 (269) 349‑9745
• 301 N Main St, Sheridan Community Hospital ClinicsSheridan, MI 48884 (989) 291‑6235
• 3875 Bay RdSaginaw, MI 48603 (989) 583‑5300
• 4441 Capital Ave SW, Bronson Urology SpecialistsBattle Creek, MI 49015 (269) 788‑6888

Group practices

Medicare enrollment lists Markian Iwaszko as a member of these groups (CMS data updated October 2, 2026).

• Bronson Methodist Hospital729 clinicians in the group
• Covenant Medical Center, Inc.480 clinicians in the group
• Bronson Battle Creek Hospital193 clinicians in the group
• Sheridan Community Hospital18 clinicians in the group
• Urology Surgeons PC7 clinicians in the group

Specialties

• Urologyprimary

Find other Urology doctors in Michigan →

Other urologists in Grand Rapids

Clinicians with the same Medicare primary specialty in Grand Rapids, MI — not a recommendation.

• Kenneth F. Shockley, DO
• Jeffrey B. Casamento, MD
• Philip T. Hoekstra, MD
• Alexander M. Shannon, DO
• Navneet S. Mander, MD
• Chase B. Heilbronn, MD
• Christopher Brede
• Andrew L. McElroy, MD

All urologists in Grand Rapids →

Other clinicians in Bronson Methodist Hospital

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

• Jonathan T. Martinek, MD
• Nathan Demchuk, DO
• Sunil Nagpal, MD
• Imran Shafqat, MD
• Tamim Salman, MD
• Kyle R. Hammermeister, 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