Claudia Zacharek, MD
NPI 1275692642ActiveIndividual· Internal Medicine, Nephrology· Saginaw, MI
Internal Medicine, Nephrology (MD) in Saginaw, Michigan, trained at University of Texas Medical School at Houston (class of 1999). Their prescriptions cost Medicare Part D more than their services did: $1,021,811 for 4,495 claims, against $268,376 paid for services in 2024. Genzyme Corporation was the largest of 4 companies reporting payments in 2025, $7,708 in all, mostly speaking and faculty fees.
Overview
| NPI | 1275692642 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Dec 8, 2006 |
| Last updated in NPPES | Mar 29, 2021 |
| Certified by provider | Mar 29, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 4301092586 | MI |
| Internal Medicine, Nephrology | 207RN0300X | L7540 | TX |
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 - Nephrology (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 438 |
|---|---|
| Services billed | 2,437 across 22 procedure codes |
| Paid by Medicare | $268,376 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,495 · 10,345 30-day fills |
|---|---|
| Patients | 693 |
| Total drug cost | $1,021,811 |
| Generic share | 95% of claims |
Education and affiliations
| Medical school | University of Texas Medical School at Houston |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Medical group
- Claudia Zacharek MD PLCSaginaw, MI · 2 clinicians
Hospital affiliations
- Covenant Medical CenterSaginaw, MI
- Hills & Dales General HospitalCass City, MI
- Mymichigan Medical Center MidlandMidland, MI
- Mymichigan Medical Center SaginawSaginaw, MI
- Mymichigan Medical Center West BranchWest Branch, MI
Other facilities
- Bay Area Regl Dialysis Ctr - SaginawDialysis facility · Saginaw, MI
- Bay Area Regl Dialysis Ctr - Saginaw RiversideDialysis facility · Saginaw, MI
- Davita Colmare DialysisDialysis facility · Bridgeport, MI
- Fmc - Caro DialysisDialysis facility · Caro, MI
- Heritage DialysisDialysis facility · Fenton, MI
Industry payments (Open Payments)
- 2025$7,708 · 12 payments from 4 companies
- 2024$23,678 · 14 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $7,313 | 8 |
| Chiesi USA, Inc. | $300.00 | 1 |
| Otsuka America Pharmaceutical, Inc. | $53.02 | 1 |
| Amgen Inc. | $42.38 | 2 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$7,112 · 4 payments
- Honoraria$300.00 · 1 payment
- Food and Beverage$296.31 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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