Adam Patrick Callahan, PA-C
NPI 1700038346ActiveIndividual· Physician Assistant· Charleston, SC
Physician Assistant (PA-C) with Southeastern Hospitalist Services PC and 1 other group, practicing in Charleston, South Carolina. 173 Medicare patients in 2024, $18,484 paid; nearly all of their 50 Part D prescriptions were generic (92%). E.R. Squibb & Sons, L.L.C. reported $90.58 in payments in 2025, mostly food and beverage. Lists Musc Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1700038346 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Oct 15, 2008 |
| Last updated in NPPES | May 28, 2025 |
| Certified by provider | May 28, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 2069 | SC |
| Physician Assistant | 363A00000X | 99034373A | IN |
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 - Physician Assistant (IN); Practitioner - Physician Assistant (SC); Practitioner - Physician Assistant (VA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 173 |
|---|---|
| Services billed | 237 across 14 procedure codes |
| Paid by Medicare | $18,484 |
Part D prescriptions in 2024
| Prescriptions (claims) | 50 · 55 30-day fills |
|---|---|
| Patients | 24 |
| Total drug cost | $320.63 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 2008 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical groups
- Southeastern Hospitalist Services PCMyrtle Beach, SC · 297 clinicians
- Charleston-Amg Specialty Hospital IncMt Pleasant, SC · 17 clinicians
Hospital affiliations
- Musc Medical CenterCharleston, SC
- Trident Medical CenterCharleston, SC
Other facilities
- Rocky Mountain Home Health - UtahHome health agency · Woods Cross, UT
Industry payments (Open Payments)
- 2025$90.58 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| E.R. Squibb & Sons, L.L.C. | $90.58 | 1 |
What the 2025 payments were for
- Food and Beverage$90.58 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 426 physician assistants in Charleston · All physician assistants in South Carolina