John S. Zazaian, DO
NPI 1871581934ActiveIndividual· Internal Medicine· Waterford, MI
Internal Medicine (DO) in Waterford, Michigan, trained at Michigan State University College of Osteopathic Medicine (class of 1982). Their prescriptions cost Medicare Part D more than their services did: $570,800 for 4,622 claims, against $104,779 paid for services in 2024. Boehringer Ingelheim Pharmaceuticals, Inc. was the largest of 7 companies reporting payments in 2025, $255.83 in all, mostly food and beverage.
Overview
| NPI | 1871581934 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Oct 12, 2005 |
| Last updated in NPPES | Aug 28, 2020 |
| Certified by provider | Aug 28, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 5101008304 | 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 | 460 |
|---|---|
| Services billed | 1,639 across 53 procedure codes |
| Paid by Medicare | $104,779 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,622 · 9,289 30-day fills |
|---|---|
| Patients | 370 |
| Total drug cost | $570,800 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Michigan State University College of Osteopathic Medicine |
|---|---|
| Graduation year | 1982 |
| Medicare specialty | Internal Medicine |
Medical groups
- Apollo Hospitalist GroupGarden City, MI · 17 clinicians
- Michigan Internal Medicine Associates,p.C.Waterford, MI · 6 clinicians
Hospital affiliations
- Beaumont Hospital - DearbornDearborn, MI
- Beaumont Hospital Royal OakRoyal Oak, MI
- Garden City HospitalGarden City, MI
- McLaren OaklandPontiac, MI
Industry payments (Open Payments)
- 2025$255.83 · 13 payments from 7 companies
- 2024$120.51 · 7 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | $90.23 | 4 |
| Astrazeneca Pharmaceuticals LP | $73.85 | 4 |
| Abbvie Inc. | $24.38 | 1 |
| Glaxosmithkline, LLC. | $21.43 | 1 |
| Exact Sciences Corporation | $16.46 | 1 |
What the 2025 payments were for
- Food and Beverage$255.83 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 38 internal medicine physicians in Waterford · All internal medicine physicians in Michigan