Sean Anthony Cassleman, DO
NPI 1720404775ActiveIndividual· Internal Medicine· Saint Clair Shores, MI
Internal Medicine (DO) in Saint Clair Shores, Michigan, trained at Michigan State University College of Osteopathic Medicine (class of 2014). Their prescriptions cost Medicare Part D more than their services did: $680,478 for 5,429 claims, against $43,780 paid for services in 2024. Novo Nordisk Inc was the largest of 9 companies reporting payments in 2025, $231.29 in all, mostly food and beverage.
Overview
| NPI | 1720404775 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Mar 14, 2014 |
| Last updated in NPPES | Nov 1, 2025 |
| Certified by provider | Nov 1, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 5101020867 | 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 - Internal Medicine (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 158 |
|---|---|
| Services billed | 711 across 31 procedure codes |
| Paid by Medicare | $43,780 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,429 · 12,826 30-day fills |
|---|---|
| Patients | 380 |
| Total drug cost | $680,478 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | Michigan State University College of Osteopathic Medicine |
|---|---|
| Graduation year | 2014 |
| Medicare specialty | Internal Medicine |
Medical group
- Henry Ford Semi Medical GroupMacomb, MI · 240 clinicians
Hospital affiliations
- Beaumont Hospital - Grosse PointeGrosse Pointe, MI
- Henry Ford Health HospitalDetroit, MI
- Henry Ford Health St John HospitalDetroit, MI
- Henry Ford Macomb HospitalClinton Township, MI
- Henry Ford Health Warren HospitalWarren, MI
Industry payments (Open Payments)
- 2025$231.29 · 11 payments from 9 companies
- 2024$138.46 · 8 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $58.81 | 3 |
| Antares Pharma, Inc. | $26.14 | 1 |
| Lilly USA, LLC | $25.70 | 1 |
| Corcept Therapeutics | $22.29 | 1 |
| Radius Health, Inc. | $21.84 | 1 |
What the 2025 payments were for
- Food and Beverage$231.29 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other internal medicine physicians in Saint Clair Shores
- 1023013711
- 1154434975
- 1164469821
- 1255407631
- 1356499800
- 1528508850
- 1689672024
- 1750306742
- 1750497483
- 1770552382
- 1902835168
- 1528687225
All 33 internal medicine physicians in Saint Clair Shores · All internal medicine physicians in Michigan