Catherine M. Thomas, M.D.
NPI 1093796500ActiveIndividual· Internal Medicine· Hattiesburg, MS
Internal Medicine (M.D.) in Hattiesburg, Mississippi, trained at University of South Alabama College of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $3,126,542 for 7,479 claims, against $319.14 paid for services in 2024. Gilead Sciences, Inc. was the largest of 6 companies reporting payments in 2025, $835.80 in all, mostly food and beverage.
Overview
| NPI | 1093796500 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Nov 10, 2005 |
| Last updated in NPPES | Jul 8, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 17738 | 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 - Internal Medicine (MS) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 15 |
|---|---|
| Services billed | 40 across 8 procedure codes |
| Paid by Medicare | $319.14 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,479 · 11,859 30-day fills |
|---|---|
| Patients | 185 |
| Total drug cost | $3,126,542 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | University of South Alabama College of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Internal Medicine |
Medical group
- Southeast Mississippi Rural Health Initiative, Inc.Picayune, MS · 40 clinicians
Industry payments (Open Payments)
- 2025$835.80 · 45 payments from 6 companies
- 2024$745.24 · 42 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $316.75 | 18 |
| Viiv Healthcare Company | $264.21 | 14 |
| Merck Sharp & Dohme LLC | $137.71 | 7 |
| Lilly USA, LLC | $67.57 | 4 |
| Theratechnologies Inc. | $30.08 | 1 |
What the 2025 payments were for
- Food and Beverage$835.80 · 45 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 55 internal medicine physicians in Hattiesburg · All internal medicine physicians in Mississippi