Michael T. Callahan, PA-C
NPI 1891844148ActiveIndividual· Physician Assistant· Saint Joseph, MI
Physician Assistant (PA-C) with Epmg Southwest Michigan PLLC, practicing in Saint Joseph, Michigan. 135 Medicare patients in 2024, $15,698 paid; nearly all of their 289 Part D prescriptions were generic (93%). Vertex Pharmaceuticals Incorporated was the largest of 2 companies reporting payments in 2025, $31.47 in all, mostly food and beverage. Lists Lakeland Hospital, St Joseph as a hospital affiliation.
Overview
| NPI | 1891844148 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Jan 9, 2007 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 5601003934 | MI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Physician Assistant (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 135 |
|---|---|
| Services billed | 180 across 14 procedure codes |
| Paid by Medicare | $15,698 |
Part D prescriptions in 2024
| Prescriptions (claims) | 289 · 309 30-day fills |
|---|---|
| Patients | 177 |
| Total drug cost | $7,350 |
| Generic share | 93% of claims |
Education and affiliations
| Graduation year | 2002 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Epmg Southwest Michigan PLLCSaint Joseph, MI · 45 clinicians
Hospital affiliation
- Lakeland Hospital, St JosephSt Joseph, MI
Industry payments (Open Payments)
- 2025$31.47 · 2 payments from 2 companies
- 2024$24.88 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Vertex Pharmaceuticals Incorporated | $15.99 | 1 |
| Csl Behring | $15.48 | 1 |
What the 2025 payments were for
- Food and Beverage$31.47 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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