Michael C. Willoughby, D.O.
NPI 1457589582ActiveIndividual· Internal Medicine, Cardiovascular Disease· Mount Clemens, MI
Internal Medicine, Cardiovascular Disease (D.O.) in Mount Clemens, Michigan, trained at Michigan State University College of Osteopathic Medicine (class of 2009). Their prescriptions cost Medicare Part D more than their services did: $168,660 for 738 claims, against $101,866 paid for services in 2024. Abbott Laboratories was the largest of 2 companies reporting payments in 2025, $157.85 in all, mostly food and beverage.
Overview
| NPI | 1457589582 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Jun 27, 2009 |
| Last updated in NPPES | Aug 22, 2025 |
| Certified by provider | Aug 22, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 036137782 | IL |
| Internal Medicine | 207R00000X | 5101018254 | MI |
| Internal Medicine, Clinical Cardiac Electrophysiology | 207RC0001X | 5101018254 | 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 - Cardiac Electrophysiology (IL); Practitioner - Cardiac Electrophysiology (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 286 |
|---|---|
| Services billed | 1,117 across 53 procedure codes |
| Paid by Medicare | $101,866 |
Part D prescriptions in 2024
| Prescriptions (claims) | 738 · 1,747 30-day fills |
|---|---|
| Patients | 207 |
| Total drug cost | $168,660 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Michigan State University College of Osteopathic Medicine |
|---|---|
| Graduation year | 2009 |
| Medicare specialty | Cardiac Electrophysiology |
| Secondary specialties | Cardiovascular Disease (Cardiology) |
Medical group
- Northwestern Medical Faculty FoundationChicago, IL · 4,503 clinicians
Hospital affiliations
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Northwestern Memorial HospitalChicago, IL
- Palos Community HospitalPalos Heights, IL
Industry payments (Open Payments)
- 2025$157.85 · 6 payments from 2 companies
- 2024$264.28 · 5 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbott Laboratories | $141.33 | 5 |
| Boston Scientific Corporation | $16.52 | 1 |
What the 2025 payments were for
- Food and Beverage$148.83 · 5 payments
- Travel and Lodging$9.02 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 21 cardiologists in Mount Clemens · All cardiologists in Michigan