Quick answers
- Does Alberto Nenninger Leon accept Medicare assignment?
- Yes. Medicare's clinician data says Alberto Nenninger Leon 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 Alberto Nenninger Leon see?
- In 2024, CMS data shows 277 Original Medicare patients and 647 services for Alberto Nenninger Leon. This counts Original Medicare only and measures volume, not quality.
- What is Alberto Nenninger Leon's NPI number?
- 1750809968. 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 Alberto Nenninger Leon, 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 | 277 |
|---|---|
| Services billed to Medicare | 647 |
| Different services or procedures | 17 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)200 services
- Critical care, first 30-74 minutes (99291)119 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)97 services
- Hospital discharge day management, more than 30 minutes (99239)94 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)66 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 cholesterol71%
- Diabetes56%
- Arthritis46%
- Chronic kidney disease42%
- Heart failure39%
Hospitals where Alberto Nenninger Leon works
Medicare's Facility Affiliation Data lists Alberto Nenninger Leon 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.
- CHRISTUS Santa Rosa Hospital-San MarcosSan Marcos, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450272
- Doctors Hospital at RenaissanceEdinburg, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450869
- San Juan Regional Medical Center IncFarmington, NM · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 320005
Practice locations
Addresses where Alberto Nenninger Leon is enrolled with Medicare (CMS data updated October 2, 2026).
- 29924 FM, Suite 3009New Braunfels, TX 78132 (830) 620‑0330
- 4820 E Main StFarmington, NM 87402
- 5501 S McColl RdEdinburg, TX 78539 (956) 362‑8677
- 801 W Maple StFarmington, NM 87401
Group practices
Medicare enrollment lists Alberto Nenninger Leon as a member of these groups (CMS data updated October 2, 2026).
- San Juan Regional Medical Center, Inc.241 clinicians in the group
- Renaissance Hospitalists41 clinicians in the group
- Lone Star Extensivists PLLC12 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in New Braunfels
Clinicians with the same Medicare primary specialty in New Braunfels, TX — not a recommendation.
Other clinicians in San Juan Regional Medical Center, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2016 (10 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1750809968 |
| 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