Lesa A. Thomas Namnoum, MD
NPI 1780731257ActiveIndividual· Internal Medicine, Nephrology· Mayaguez, PR
Internal Medicine, Nephrology (MD) in Mayaguez, Puerto Rico, licensed in PR, with an NPI issued in January 2007. Their prescriptions cost Medicare Part D more than their services did: $101,839 for 827 claims, against $9,955 paid for services in 2024. Nxstage Medical, Inc. was the largest of 6 companies reporting payments in 2025, $483.40 in all, mostly food and beverage. Lists Bella Vista Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1780731257 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jan 5, 2007 |
| Last updated in NPPES | Dec 4, 2024 |
| Certified by provider | Dec 4, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 11054 | PR |
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 - Nephrology (PR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 41 |
|---|---|
| Services billed | 87 across 10 procedure codes |
| Paid by Medicare | $9,955 |
Part D prescriptions in 2024
| Prescriptions (claims) | 827 · 989 30-day fills |
|---|---|
| Patients | 175 |
| Total drug cost | $101,839 |
| Generic share | 73% of claims |
Education and affiliations
| Graduation year | 1988 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Hospital affiliations
- Bella Vista HospitalMayaguez, PR
- Hospital de la ConcepcionSan German, PR
- Mayaguez Medical Center Dr Ramon Emeterio BetancesMayaguez, PR
Other facilities
- Atlantis MayaguezDialysis facility · Mayaguez, PR
Industry payments (Open Payments)
- 2025$483.40 · 8 payments from 6 companies
- 2024$465.38 · 11 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Nxstage Medical, Inc. | $145.28 | 1 |
| Glaxosmithkline, LLC. | $111.69 | 1 |
| Apellis Pharmaceuticals, Inc. | $86.18 | 1 |
| Novartis Pharmaceuticals Corporation | $53.76 | 2 |
| Astrazeneca Pharmaceuticals LP | $46.49 | 2 |
What the 2025 payments were for
- Food and Beverage$483.40 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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