Joseph J. Marous Iii, MD

Medicare activity in 2024

Official CMS public-use data for Joseph J. Marous Iii, 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. X-ray of chest, 2 views (71046)367 services
2. X-ray of chest, 1 view (71045)360 services
3. Ct scan head or brain without contrast (70450)232 services
4. Screening mammography (77067)195 services
5. Screening 3d breast mammography (77063)193 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%
• Arthritis54%
• Anxiety37%
• Chronic kidney disease37%
• Diabetes36%

Hospitals where Joseph J. Marous Iii works

Medicare's Facility Affiliation Data lists Joseph J. Marous Iii 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.

• Mercy Health Lakeshore CampusShelby, MI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 231320
• Trinity Health Grand Haven HospitalGrand Haven, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230174
• Trinity Health Muskegon HospitalMuskegon, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230066

Practice locations

Addresses where Joseph J. Marous Iii is enrolled with Medicare (CMS data updated October 2, 2026).

• 1700 Clinton StMuskegon, MI 49442 (231) 728‑4948

Group practices

Medicare enrollment lists Joseph J. Marous Iii as a member of this group (CMS data updated October 2, 2026).

• Radiology Muskegon, PC22 clinicians in the group

Specialties

• Diagnostic Radiologyprimary

Find other Diagnostic Radiology doctors in Michigan →

Other radiologists in Muskegon

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

• Patrick M. Couture, MD
• Courtney A. Garlick, MD
• Angela A. Sneider, DO
• Jeffrey L. Stuk, DO
• Tyler J. Rummel, DO
• Daniel A. Osborn, MD
• Rocky Saenz, DO
• Rachel Shields, MD

All radiologists in Muskegon →

Other clinicians in Radiology Muskegon, PC

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

• Patrick M. Couture, MD
• Courtney A. Garlick, MD
• Angela A. Sneider, DO
• Anthony D. Barclay, MD
• John D. Kaurich, MD
• Mark R. Pennington, 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