Mary G. Mezher, DO
NPI 1124686365ActiveIndividual· Internal Medicine· Muskegon, MI
Internal Medicine (DO) with Mercy Specialty Services, practicing in Muskegon, Michigan. In 2024 Medicare paid $36,106 for 266 patients, and Part D covered 118 of their prescriptions, 89% of them generic. Inspire Medical Systems, Inc. reported $17.86 in payments in 2025, mostly food and beverage. Lists Mercy Health Lakeshore Campus and 1 other hospital as hospital affiliations.
Overview
| NPI | 1124686365 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Jun 3, 2019 |
| Last updated in NPPES | Aug 29, 2022 |
| Certified by provider | Aug 29, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 5101026939 | MI |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 | 266 |
|---|---|
| Services billed | 497 across 11 procedure codes |
| Paid by Medicare | $36,106 |
Part D prescriptions in 2024
| Prescriptions (claims) | 118 · 119 30-day fills |
|---|---|
| Patients | 64 |
| Total drug cost | $7,261 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Mercy Specialty ServicesMuskegon, MI · 90 clinicians
Hospital affiliations
- Mercy Health Lakeshore CampusShelby, MI
- Trinity Health Muskegon HospitalMuskegon, MI
Industry payments (Open Payments)
- 2025$17.86 · 1 payment from 1 company
- 2024$72.94 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Inspire Medical Systems, Inc. | $17.86 | 1 |
What the 2025 payments were for
- Food and Beverage$17.86 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 63 internal medicine physicians in Muskegon · All internal medicine physicians in Michigan