Zachary Peter Hamersma, MD
NPI 1245725217ActiveIndividual· Emergency Medicine· Ludington, MI
Emergency Medicine (MD) in Ludington, Michigan, trained at Michigan State University College of Human Medicine (class of 2018). 281 Medicare patients in 2024, $40,331 paid; nearly all of their 383 Part D prescriptions were generic (95%). Stryker Corporation reported $27.27 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1245725217 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 22, 2018 |
| Last updated in NPPES | Jan 2, 2026 |
| Certified by provider | Jan 2, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | 4301115550 | MI |
| Anesthesiology | 207L00000X | 4301502785 | 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 - Emergency Medicine (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 281 |
|---|---|
| Services billed | 335 across 26 procedure codes |
| Paid by Medicare | $40,331 |
Part D prescriptions in 2024
| Prescriptions (claims) | 383 · 395 30-day fills |
|---|---|
| Patients | 267 |
| Total drug cost | $6,396 |
| Generic share | 95% of claims |
Education and affiliations
| Medical school | Michigan State University College of Human Medicine |
|---|---|
| Graduation year | 2018 |
| Medicare specialty | Emergency Medicine |
Medical group
- Ecs Western Michigan PCGrand Rapids, MI · 201 clinicians
Hospital affiliations
- Corewell Health Ludington HospitalLudington, MI
- Spectrum HealthGrand Rapids, MI
Industry payments (Open Payments)
- 2025$27.27 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Stryker Corporation | $27.27 | 1 |
What the 2025 payments were for
- Food and Beverage$27.27 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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