Marcel B. Twahirwa, MD
NPI 1841381167ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Edinburg, TX
Internal Medicine, Endocrinology, Diabetes & Metabolism (MD) with Renaissance Endocrinology, practicing in Edinburg, Texas. Their prescriptions cost Medicare Part D more than their services did: $6,230,188 for 13,138 claims, against $40,588 paid for services in 2024. Dexcom, Inc. was the largest of 3 companies reporting payments in 2025, $131.91 in all, mostly food and beverage. Lists Doctors Hosptal at Renaissance and 1 other hospital as hospital affiliations.
Overview
| NPI | 1841381167 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 28, 2006 |
| Last updated in NPPES | Jan 19, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | K3869 | TX |
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 - Endocrinology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 283 |
|---|---|
| Services billed | 649 across 9 procedure codes |
| Paid by Medicare | $40,588 |
Part D prescriptions in 2024
| Prescriptions (claims) | 13,138 · 30,599 30-day fills |
|---|---|
| Patients | 1,190 |
| Total drug cost | $6,230,188 |
| Generic share | 44% of claims |
Education and affiliations
| Graduation year | 1990 |
|---|---|
| Medicare specialty | Endocrinology |
| Secondary specialties | Internal Medicine |
Medical group
- Renaissance EndocrinologyMission, TX · 10 clinicians
Hospital affiliations
- Doctors Hosptal at RenaissanceEdinburg, TX
- Rio Grande Regional HospitalMcAllen, TX
Industry payments (Open Payments)
- 2025$131.91 · 4 payments from 3 companies
- 2024$101.76 · 4 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Dexcom, Inc. | $56.04 | 1 |
| Abbott Laboratories | $42.60 | 1 |
| Lilly USA, LLC | $33.27 | 2 |
What the 2025 payments were for
- Food and Beverage$131.91 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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