John M. Sullivan, MD
NPI 1336132117ActiveIndividual· Surgery· Ennis, TX
Surgery (MD) in Ennis, Texas, trained at University of Michigan Medical School (class of 1997). 168 Medicare patients in 2024, $70,222 paid; nearly all of their 394 Part D prescriptions were generic (96%). Merck Sharp & Dohme LLC was the largest of 6 companies reporting payments in 2025, $202.10 in all, mostly food and beverage.
Overview
| NPI | 1336132117 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Aug 26, 2005 |
| Last updated in NPPES | Jan 13, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | K5708 | TX |
| Surgery, Vascular Surgery | 2086S0129X | K5708 | TX |
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 - General Surgery (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 168 |
|---|---|
| Services billed | 536 across 66 procedure codes |
| Paid by Medicare | $70,222 |
Part D prescriptions in 2024
| Prescriptions (claims) | 394 · 623 30-day fills |
|---|---|
| Patients | 131 |
| Total drug cost | $13,712 |
| Generic share | 96% of claims |
Education and affiliations
| Medical school | University of Michigan Medical School |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | General Surgery |
Hospital affiliations
- Ennis Regional Medical CenterEnnis, TX
- Palestine Regional Medical CenterPalestine, TX
Industry payments (Open Payments)
- 2025$202.10 · 12 payments from 6 companies
- 2024$546.55 · 16 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $90.84 | 5 |
| Novo Nordisk Inc | $40.31 | 2 |
| Tela Bio, Inc. | $20.18 | 2 |
| Viatris Specialty LLC | $19.26 | 1 |
| Axsome Therapeutics, Inc. | $17.08 | 1 |
What the 2025 payments were for
- Food and Beverage$202.10 · 12 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Surgery providers in Ennis
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