William T. Halligan, M.D.
NPI 1255698163ActiveIndividual· Internal Medicine, Cardiovascular Disease· Greenville, SC
Internal Medicine, Cardiovascular Disease (M.D.) in Greenville, South Carolina, trained at Medical University of South Carolina College of Medicine (class of 2012). Their prescriptions cost Medicare Part D more than their services did: $817,584 for 3,712 claims, against $125,697 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 12 companies reporting payments in 2025, $950.60 in all, mostly food and beverage.
Overview
| NPI | 1255698163 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 16, 2012 |
| Last updated in NPPES | May 7, 2021 |
| Certified by provider | May 7, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 39407 | SC |
| Internal Medicine | 207R00000X | LL39407 | SC |
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) (SC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,353 |
|---|---|
| Services billed | 2,748 across 34 procedure codes |
| Paid by Medicare | $125,697 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,712 · 8,280 30-day fills |
|---|---|
| Patients | 616 |
| Total drug cost | $817,584 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | Medical University of South Carolina College of Medicine |
|---|---|
| Graduation year | 2012 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical group
- Prisma Health University Medical GroupGreenville, SC · 2,493 clinicians
Hospital affiliations
- Prisma Health Patewood HospitalGreenville, SC
- Prisma Health Greenville Memorial HospitalGreenville, SC
- Prisma Health Greer Memorial HospitalSpartanburg, SC
- Prisma Health Hillcrest HospitalSimpsonville, SC
- Prisma Health Oconee Memorial HospitalSeneca, SC
Industry payments (Open Payments)
- 2025$950.60 · 51 payments from 12 companies
- 2024$1,143 · 61 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $145.24 | 7 |
| E.R. Squibb & Sons, L.L.C. | $142.79 | 8 |
| Boston Scientific Corporation | $117.33 | 5 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $116.16 | 6 |
| Philips North America LLC | $93.78 | 3 |
What the 2025 payments were for
- Food and Beverage$950.60 · 51 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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