William Greg Thaggard, M.D.
NPI 1114923547ActiveIndividual· Internal Medicine, Gastroenterology· Meridian, MS
Internal Medicine, Gastroenterology (M.D.) in Meridian, Mississippi, trained at University of Mississippi School of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $237,888 for 1,200 claims, against $151,856 paid for services in 2024. Celltrion USA Inc. was the largest of 2 companies reporting payments in 2025, $51.98 in all, mostly food and beverage.
Overview
| NPI | 1114923547 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 21, 2005 |
| Last updated in NPPES | Oct 17, 2024 |
| Certified by provider | Oct 17, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 12547 | MS |
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 - Gastroenterology (MS) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 729 |
|---|---|
| Services billed | 1,622 across 50 procedure codes |
| Paid by Medicare | $151,856 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,200 · 1,670 30-day fills |
|---|---|
| Patients | 251 |
| Total drug cost | $237,888 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | University of Mississippi School of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Gastroenterology |
Medical groups
- Medical Foundation IncMeridian, MS · 212 clinicians
- Anderson Physician Alliance IncMeridian, MS · 69 clinicians
Hospital affiliations
- Anderson Regional Medical CenterMeridian, MS
- Neshoba County General HospitalPhiladelphia, MS
- Ochsner Rush HospitalMeridian, MS
- Ochsner Watkins HospitalQuitman, MS
Industry payments (Open Payments)
- 2025$51.98 · 3 payments from 2 companies
- 2024$320.78 · 10 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Celltrion USA Inc. | $30.74 | 2 |
| Intercept Pharmaceuticals, Inc. | $21.24 | 1 |
What the 2025 payments were for
- Food and Beverage$51.98 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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