Quick answers
- Does Marcel B. Twahirwa accept Medicare assignment?
- Yes. Medicare's clinician data says Marcel B. Twahirwa accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Marcel B. Twahirwa see?
- In 2024, CMS data shows 283 Original Medicare patients and 649 services for Marcel B. Twahirwa. This counts Original Medicare only and measures volume, not quality.
- What is Marcel B. Twahirwa's NPI number?
- 1841381167. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Marcel B. Twahirwa, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 283 |
|---|---|
| Services billed to Medicare | 649 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)443 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)113 services
- Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report (95251)39 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)22 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)20 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Diabetes75%
- Chronic kidney disease61%
- Ischemic heart disease46%
- Arthritis42%
Hospitals where Marcel B. Twahirwa works
Medicare's Facility Affiliation Data lists Marcel B. Twahirwa at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Doctors Hospital at RenaissanceEdinburg, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450869
- Rio Grande Regional HospitalMcAllen, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450711
Practice locations
Addresses where Marcel B. Twahirwa is enrolled with Medicare (CMS data updated October 2, 2026).
- 2121 E Griffin Pkwy, Suite 17Mission, TX 78572 (956) 362‑5650
- 2609 W Michaelangelo DrEdinburg, TX 78539 (956) 362‑5650
Group practices
Medicare enrollment lists Marcel B. Twahirwa as a member of this group (CMS data updated October 2, 2026).
- Renaissance Endocrinology10 clinicians in the group
Specialties
- Endocrinologyprimary
- Internal Medicinealso
Other endocrinologists in Texas
Clinicians with the same Medicare primary specialty in Texas — not a recommendation.
Other clinicians in Renaissance Endocrinology
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1990 (36 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841381167 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians