Quick answers
- Does Luis A. Villarreal accept Medicare assignment?
- Yes. Medicare's clinician data says Luis A. Villarreal 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 Luis A. Villarreal see?
- In 2024, CMS data shows 191 Original Medicare patients and 306 services for Luis A. Villarreal. This counts Original Medicare only and measures volume, not quality.
- What is Luis A. Villarreal's NPI number?
- 1275766040. 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 Luis A. Villarreal, 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 | 191 |
|---|---|
| Services billed to Medicare | 306 |
| Different services or procedures | 17 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Emergency department visit with high level of medical decision making (99285)119 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)90 services
- Critical care, first 30-74 minutes (99291)41 services
- Emergency department visit with moderate level of medical decision making (99284)34 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%
- Arthritis54%
- Diabetes52%
- Ischemic heart disease49%
- Chronic kidney disease43%
Practice locations
Addresses where Luis A. Villarreal is enrolled with Medicare (CMS data updated October 2, 2026).
- 11800 Astoria BlvdHouston, TX 77089 (713) 338‑6565
Group practices
Medicare enrollment lists Luis A. Villarreal as a member of this group (CMS data updated October 2, 2026).
- Memorial Hermann Hospital Based Physician Group276 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Houston
Clinicians with the same Medicare primary specialty in Houston, TX — not a recommendation.
Other clinicians in Memorial Hermann Hospital Based Physician Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Southwestern Medical School At Dallas |
| Graduation year | 2006 (20 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1275766040 |
| 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
- 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