Stephen T. Amann, MD
NPI 1063471761ActiveIndividual· Internal Medicine, Gastroenterology· Tupelo, MS
Internal Medicine, Gastroenterology (MD) in Tupelo, Mississippi, trained at Creighton University School of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $474,374 for 1,271 claims, against $204,994 paid for services in 2024. Ardelyx, Inc. was the largest of 11 companies reporting payments in 2025, $481.02 in all, mostly food and beverage.
Overview
| NPI | 1063471761 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 21, 2006 |
| Last updated in NPPES | Feb 9, 2026 |
| Certified by provider | Feb 9, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 16359 | MS |
| Internal Medicine, Gastroenterology | 207RG0100X | ME57925 | FL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 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 | 769 |
|---|---|
| Services billed | 5,634 across 51 procedure codes |
| Paid by Medicare | $204,994 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,271 · 1,861 30-day fills |
|---|---|
| Patients | 537 |
| Total drug cost | $474,374 |
| Generic share | 75% of claims |
Education and affiliations
| Medical school | Creighton University School of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Gastroenterology |
Medical group
- Gastroenterology Center of the Midsouth PLLCJackson, TN · 149 clinicians
Hospital affiliations
- Clay County Medical CorporationWest Point, MS
- Marion Regional Medical CenterHamilton, AL
- North Mississippi Medical CenterTupelo, MS
- North Mississippi Medical Center-Gilmore AmoryAmory, MS
- Tishomingo Health Services IncIuka, MS
Industry payments (Open Payments)
- 2025$481.02 · 24 payments from 11 companies
- 2024$748.34 · 49 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ardelyx, Inc. | $91.35 | 4 |
| Boston Scientific Corporation | $81.05 | 4 |
| Gilead Sciences, Inc. | $66.69 | 3 |
| Genzyme Corporation | $46.64 | 2 |
| Amgen Inc. | $39.19 | 2 |
What the 2025 payments were for
- Food and Beverage$481.02 · 24 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Gastroenterology providers in Tupelo
- 1366477390
- 1679734933
- 1962461673
- 1710410436
- 1780643494
- 1881603538
- 1184614620
- 1881816619
- 1679532386
- 1023077732
- 1821250978
- 1346530599
All Internal Medicine, Gastroenterology providers in Mississippi →