Michael J. Hayes, M.D.
NPI 1174587943ActiveIndividual· Internal Medicine· Marion, OH
Internal Medicine (M.D.) in Marion, Ohio, trained at Michigan State University College of Human Medicine (class of 1980). Their prescriptions cost Medicare Part D more than their services did: $882,443 for 12,825 claims, against $118,573 paid for services in 2024. Glaxosmithkline, LLC. was the largest of 9 companies reporting payments in 2025, $406.69 in all, mostly food and beverage.
Overview
| NPI | 1174587943 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 17, 2006 |
| Last updated in NPPES | Aug 10, 2026 |
| Certified by provider | Aug 10, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 35.049227 | OH |
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 (OH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 376 |
|---|---|
| Services billed | 3,126 across 35 procedure codes |
| Paid by Medicare | $118,573 |
Part D prescriptions in 2024
| Prescriptions (claims) | 12,825 · 28,177 30-day fills |
|---|---|
| Patients | 701 |
| Total drug cost | $882,443 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | Michigan State University College of Human Medicine |
|---|---|
| Graduation year | 1980 |
| Medicare specialty | Internal Medicine |
Medical group
- Marion Area Physicians LLCMarion, OH · 181 clinicians
Hospital affiliations
- Grady Memorial HospitalDelaware, OH
- Hardin Memorial HospitalKenton, OH
- Marion General HospitalMarion, OH
- Ohiohealth Morrow County HospitalMount Gilead, OH
- Wyandot Memorial HospitalUpper Sandusky, OH
Other facilities
- Ohiohealth Home Health With CompassusHome health agency · Dublin, OH
Industry payments (Open Payments)
- 2025$406.69 · 26 payments from 9 companies
- 2024$911.89 · 59 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaxosmithkline, LLC. | $137.17 | 10 |
| Astrazeneca Pharmaceuticals LP | $81.12 | 5 |
| Exact Sciences Corporation | $40.63 | 2 |
| Lilly USA, LLC | $33.88 | 2 |
| Novo Nordisk Inc | $32.70 | 2 |
What the 2025 payments were for
- Food and Beverage$406.69 · 26 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 38 internal medicine physicians in Marion · All internal medicine physicians in Ohio