Mark O'Connor, MD
NPI 1245232800ActiveIndividual· Internal Medicine, Clinical Cardiac Electrophysiology· Toledo, OH
Internal Medicine, Clinical Cardiac Electrophysiology (MD) in Toledo, Ohio, trained at University of Michigan Medical School (class of 1986). Their prescriptions cost Medicare Part D more than their services did: $1,221,701 for 8,553 claims, against $152,388 paid for services in 2024. Inspire Medical Systems, Inc. reported $20.14 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1245232800 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 12, 2005 |
| Last updated in NPPES | Sep 29, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Clinical Cardiac Electrophysiology Primary | 207RC0001X | 350721050 | 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 - Cardiovascular Disease (Cardiology) (MI); Practitioner - Cardiovascular Disease (Cardiology) (OH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 798 |
|---|---|
| Services billed | 2,933 across 47 procedure codes |
| Paid by Medicare | $152,388 |
Part D prescriptions in 2024
| Prescriptions (claims) | 8,553 · 18,822 30-day fills |
|---|---|
| Patients | 882 |
| Total drug cost | $1,221,701 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | University of Michigan Medical School |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical group
- Toledo Cardiology Consultants IncToledo, OH · 17 clinicians
Hospital affiliations
- Mercy Health - Tiffin HospitalTiffin, OH
- Mercy Health - Willard HospitalWillard, OH
- Mercy St Vincent Medical CenterToledo, OH
- Promedica Toledo HospitalToledo, OH
Industry payments (Open Payments)
- 2025$20.14 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Inspire Medical Systems, Inc. | $20.14 | 1 |
What the 2025 payments were for
- Food and Beverage$20.14 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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