James C. Mackenzie, MD
NPI 1548251168ActiveIndividual· Internal Medicine· Troy, MI
Internal Medicine (MD) in Troy, Michigan, trained at Northwestern University Feinberg Medical School (class of 1971). Their prescriptions cost Medicare Part D more than their services did: $372,575 for 5,138 claims, against $59,225 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 4 companies reporting payments in 2025, $521.21 in all, mostly food and beverage.
Overview
| NPI | 1548251168 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 2, 2005 |
| Last updated in NPPES | Jul 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 4301030901 | 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 | 204 |
|---|---|
| Services billed | 936 across 22 procedure codes |
| Paid by Medicare | $59,225 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,138 · 11,712 30-day fills |
|---|---|
| Patients | 395 |
| Total drug cost | $372,575 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Northwestern University Feinberg Medical School |
|---|---|
| Graduation year | 1971 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Hospital affiliations
- Beaumont Hospital - Grosse PointeGrosse Pointe, MI
- Beaumont Hospital Royal OakRoyal Oak, MI
- Beaumont Hospital, TroyTroy, MI
Industry payments (Open Payments)
- 2025$521.21 · 5 payments from 4 companies
- 2024$113.94 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $249.48 | 2 |
| Novo Nordisk Inc | $124.74 | 1 |
| Genzyme Corporation | $124.74 | 1 |
| Pfizer Inc. | $22.25 | 1 |
What the 2025 payments were for
- Food and Beverage$521.21 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 171 internal medicine physicians in Troy · All internal medicine physicians in Michigan