John Michael Guest, MD
NPI 1235796780ActiveIndividual· Ophthalmology· Saint Clair Shores, MI
Ophthalmology (MD) in Saint Clair Shores, Michigan, trained at Wayne State University School of Medicine (class of 2019). In 2024 Medicare paid $86,040 for 306 patients, and Part D covered 420 of their prescriptions, 63% of them generic. Bausch & Lomb Americas Inc. was the largest of 6 companies reporting payments in 2025, $544.32 in all, mostly food and beverage.
Overview
| NPI | 1235796780 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 21, 2019 |
| Last updated in NPPES | Jul 1, 2026 |
| Certified by provider | Jul 1, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | 4351044538 | MI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Ophthalmology (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 306 |
|---|---|
| Services billed | 1,174 across 37 procedure codes |
| Paid by Medicare | $86,040 |
Part D prescriptions in 2024
| Prescriptions (claims) | 420 · 610 30-day fills |
|---|---|
| Patients | 198 |
| Total drug cost | $46,911 |
| Generic share | 63% of claims |
Education and affiliations
| Medical school | Wayne State University School of Medicine |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | Ophthalmology |
Medical group
- Richard C Mertz Jr MD PCSaint Clair Shores, MI · 5 clinicians
Industry payments (Open Payments)
- 2025$544.32 · 16 payments from 6 companies
- 2024$849.45 · 19 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bausch & Lomb Americas Inc. | $194.46 | 6 |
| Regeneron Healthcare Solutions, Inc. | $191.02 | 3 |
| Alcon Vision LLC | $49.61 | 2 |
| Dompe US, Inc. | $46.46 | 2 |
| Tarsus Pharmaceuticals, Inc. | $46.44 | 2 |
What the 2025 payments were for
- Food and Beverage$536.82 · 15 payments
- Education$7.50 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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