Natalia L. Baj-Osiewicz, MD

Medicare activity in 2024

Official CMS public-use data for Natalia L. Baj-Osiewicz, 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)162 services
2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)44 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)25 services
4. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)24 services
5. Hospital discharge day management, 30 minutes or less (99238)14 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%
• Ischemic heart disease52%
• Chronic kidney disease51%
• Heart failure46%
• Diabetes45%

Hospitals where Natalia L. Baj-Osiewicz works

Medicare's Facility Affiliation Data lists Natalia L. Baj-Osiewicz 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.

• Ascension Genesys HospitalGrand Blanc, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230197

Practice locations

Addresses where Natalia L. Baj-Osiewicz is enrolled with Medicare (CMS data updated October 2, 2026).

• 1 Genesys PkwyGrand Blanc, MI 48439 (810) 606‑5000
• 420 S Saginaw StFlint, MI 48502 (810) 232‑3522

Group practices

Medicare enrollment lists Natalia L. Baj-Osiewicz as a member of this group (CMS data updated October 2, 2026).

• Henry Ford Health Genesys Hospital84 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Michigan →

Other internal medicine doctors in Grand Blanc

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

• Rajakumari L. Swamy, MD
• Robert Schneiderman, DO
• Mohammed Siddiqui, MD
• Maath Alani, MD
• Lochan Bellamkonda, MD
• Osama Galal, MD
• Hsiao P. Bechinski, DO
• Bill E. Hukill Ii, DO

All internal medicine doctors in Grand Blanc →

Other clinicians in Henry Ford Health Genesys Hospital

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

• Alexandra G. Boucher, DO
• Shai M. Brosh
• Michael J. Neumann, DO
• Joanna L. O'Dacre, CNA
• Marcos E. Machado, MD
• Lauren Howard, CNA

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