John M. Provenza, M.D.
NPI 1225028434ActiveIndividual· Internal Medicine, Gastroenterology· Shreveport, LA
Internal Medicine, Gastroenterology (M.D.) in Shreveport, Louisiana, trained at Louisiana State University School of Medicine in Shreveport (class of 1984). Their prescriptions cost Medicare Part D more than their services did: $1,117,660 for 1,275 claims, against $148,184 paid for services in 2024. Abbvie Inc. was the largest of 7 companies reporting payments in 2025, $680.12 in all, mostly food and beverage.
Overview
| NPI | 1225028434 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 27, 2005 |
| Last updated in NPPES | Oct 29, 2026 |
| Certified by provider | Oct 29, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 017860 | LA |
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 (LA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 582 |
|---|---|
| Services billed | 3,345 across 42 procedure codes |
| Paid by Medicare | $148,184 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,275 · 1,710 30-day fills |
|---|---|
| Patients | 505 |
| Total drug cost | $1,117,660 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | Louisiana State University School of Medicine in Shreveport |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Gastroenterology |
Medical groups
- Capitol City Family Health Center IncorporatedBaton Rouge, LA · 41 clinicians
- Gastrointestinal Specialists AmcShreveport, LA · 33 clinicians
Hospital affiliations
- Christus Shreveport-Bossier Health SystemShreveport, LA
- Willis Knighton Medical CenterShreveport, LA
Industry payments (Open Payments)
- 2025$680.12 · 40 payments from 7 companies
- 2024$1,356 · 76 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $218.49 | 14 |
| Pfizer Inc. | $143.39 | 11 |
| Genzyme Corporation | $124.22 | 5 |
| Takeda Pharmaceuticals U.S.A., Inc. | $75.19 | 4 |
| Gilead Sciences, Inc. | $62.32 | 3 |
What the 2025 payments were for
- Food and Beverage$680.12 · 40 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 48 gastroenterologists in Shreveport · All gastroenterologists in Louisiana