Mahmoud Bayoumi, M.D., M.P.H.
NPI 1023541109ActiveIndividual· Internal Medicine, Gastroenterology· Knoxville, TN
Internal Medicine, Gastroenterology (M.D., M.P.H.) with University Health System, Inc., practicing in Knoxville, Tennessee. Their prescriptions cost Medicare Part D more than their services did: $227,942 for 328 claims, against $28,619 paid for services in 2024. Enterra Medical, Inc. was the largest of 15 companies reporting payments in 2025, $2,435 in all, mostly food and beverage. Lists Singing River Gulfport and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1023541109 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., M.P.H. |
| Sole proprietor | Yes |
| NPI issued | Apr 6, 2017 |
| Last updated in NPPES | Aug 11, 2026 |
| Certified by provider | Aug 11, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 61454 | TN |
| Internal Medicine, Gastroenterology | 207RG0100X | 0101290624 | VA |
| Internal Medicine, Gastroenterology | 207RG0100X | 37499 | MS |
| Internal Medicine | 207R00000X | 61454 | TN |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (MS); Practitioner - Gastroenterology (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 171 |
|---|---|
| Services billed | 366 across 34 procedure codes |
| Paid by Medicare | $28,619 |
Part D prescriptions in 2024
| Prescriptions (claims) | 328 · 568 30-day fills |
|---|---|
| Patients | 168 |
| Total drug cost | $227,942 |
| Generic share | 67% of claims |
Education and affiliations
| Graduation year | 2014 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- University Health System, Inc.Knoxville, TN · 522 clinicians
Hospital affiliations
- Singing River GulfportGulfport, MS
- Singing River Health SystemPascagoula, MS
- University Health System, IncKnoxville, TN
Industry payments (Open Payments)
- 2025$2,435 · 52 payments from 15 companies
- 2024$838.99 · 37 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Enterra Medical, Inc. | $1,406 | 6 |
| Abbvie Inc. | $424.83 | 24 |
| Madrigal Pharmaceuticals | $130.53 | 4 |
| Lilly USA, LLC | $121.82 | 1 |
| Ardelyx, Inc. | $75.71 | 3 |
What the 2025 payments were for
- Food and Beverage$1,799 · 50 payments
- Travel and Lodging$636.71 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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