Natalia Baj-Osiewicz, MD
NPI 1619405123ActiveIndividual· Internal Medicine· Flint, MI
Internal Medicine (MD) with Henry Ford Health Genesys Hospital, practicing in Flint, Michigan. Their prescriptions cost Medicare Part D more than their services did: $35,267 for 345 claims, against $22,322 paid for services in 2024. Lists Ascension Genesys Hospital as a hospital affiliation.
Overview
| NPI | 1619405123 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 28, 2017 |
| Last updated in NPPES | Jun 23, 2022 |
| Certified by provider | Jun 23, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 4301507488 | MI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 91 |
|---|---|
| Services billed | 306 across 17 procedure codes |
| Paid by Medicare | $22,322 |
Part D prescriptions in 2024
| Prescriptions (claims) | 345 · 541 30-day fills |
|---|---|
| Patients | 59 |
| Total drug cost | $35,267 |
| Generic share | 82% of claims |
Education and affiliations
| Graduation year | 2013 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Henry Ford Health Genesys HospitalGrand Blanc, MI · 84 clinicians
Hospital affiliation
- Ascension Genesys HospitalGrand Blanc, MI
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 257 internal medicine physicians in Flint · All internal medicine physicians in Michigan