Matthew C. Riesen, MD
NPI 1497947998ActiveIndividual· General Practice· Saint Marys, OH
General Practice (MD) in Saint Marys, Ohio, trained at Toledo Medical College (class of 2007). Their prescriptions cost Medicare Part D more than their services did: $398,164 for 5,422 claims, against $48,904 paid for services in 2024. Abbvie Inc. was the largest of 10 companies reporting payments in 2025, $1,024 in all, mostly food and beverage.
Overview
| NPI | 1497947998 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 17, 2007 |
| Last updated in NPPES | Mar 1, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| General Practice Primary | 208D00000X | 35. 099958 | 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 - General Practice (OH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 392 |
|---|---|
| Services billed | 2,340 across 22 procedure codes |
| Paid by Medicare | $48,904 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,422 · 13,400 30-day fills |
|---|---|
| Patients | 527 |
| Total drug cost | $398,164 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | Toledo Medical College |
|---|---|
| Graduation year | 2007 |
| Medicare specialty | General Practice |
Medical group
- Mercer County Joint Township Community HospitalColdwater, OH · 61 clinicians
Hospital affiliations
- Grand Lake Health SystemSaint Marys, OH
- Lima Memorial Health SystemLima, OH
- Mercer County Joint Township Community HospitalColdwater, OH
- Mercy Health St Ritas Medical CenterLima, OH
- Wilson Memorial HospitalSidney, OH
Other facilities
- Community Health Professionals, IncHome health agency · Van Wert, OH
- Grand Lake Home HealthHome health agency · St Marys, OH
Industry payments (Open Payments)
- 2025$1,024 · 79 payments from 10 companies
- 2024$1,078 · 87 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $341.28 | 28 |
| Astrazeneca Pharmaceuticals LP | $273.08 | 28 |
| Novo Nordisk Inc | $162.56 | 11 |
| Actelion Pharmaceuticals US, Inc. | $99.95 | 1 |
| Lilly USA, LLC | $46.51 | 3 |
What the 2025 payments were for
- Food and Beverage$924.33 · 78 payments
- Education$99.95 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other general practitioners in Saint Marys
- 1407866262
- 1215152368