Ogubay T. Mesmer, MD

Medicare activity in 2024

Official CMS public-use data for Ogubay T. Mesmer, 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)509 services
2. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)304 services
3. Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)201 services
4. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)108 services
5. Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)70 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%
• Arthritis45%
• Diabetes37%
• Ischemic heart disease37%
• Chronic kidney disease36%

Hospitals where Ogubay T. Mesmer works

Medicare's Facility Affiliation Data lists Ogubay T. Mesmer 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.

• Lakeland Hospital, St JosephSt Joseph, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230021

Practice locations

Addresses where Ogubay T. Mesmer is enrolled with Medicare (CMS data updated October 2, 2026).

• 61 N Saint Joseph AveNiles, MI 49120 (269) 428‑2795

Group practices

Medicare enrollment lists Ogubay T. Mesmer as a member of this group (CMS data updated October 2, 2026).

• Lakeland Hospitals at Niles and St Joseph Inc131 clinicians in the group

Specialties

• Cardiovascular Disease (Cardiology)primary
• Internal Medicinealso

Find other Cardiovascular Disease (Cardiology) doctors in Michigan →

Other cardiologists in Michigan

Clinicians with the same Medicare primary specialty in Michigan — not a recommendation.

• John Philip Markovic, MD
• Nishit Choksi, MD
• Divakar N. Pai, MD
• Mark D. Castellani, MD
• Ramesh C. Misra, MD
• Michael B. Deyoung, DO
• William M. Merhi, DO
• Sarosh Anwar, MD

All cardiologists in Michigan →

Other clinicians in Lakeland Hospitals at Niles and St Joseph Inc

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

• Nathan Piovesan, MD
• Ryan M. Dudley, DO
• Erica Johnson, PA
• Jennifer Castelbuono, MD
• William Mackin, MD
• Alexander B. George, PA

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