Quick answers
- Does Ryan Villarreal accept Medicare assignment?
- Yes. Medicare's clinician data says Ryan 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 Ryan Villarreal see?
- In 2024, CMS data shows 77 Original Medicare patients and 82 services for Ryan Villarreal. This counts Original Medicare only and measures volume, not quality.
- What is Ryan Villarreal's NPI number?
- 1871227835. 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 Ryan 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 | 77 |
|---|---|
| Services billed to Medicare | 82 |
| Different services or procedures | 22 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Anesthesia for exam of colon using an endoscope (00812)16 services
- Anesthesia for lens surgery (00142)13 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%
- Arthritis48%
- Ischemic heart disease36%
- Diabetes34%
- Anxiety21%
Practice locations
Addresses where Ryan Villarreal is enrolled with Medicare (CMS data updated October 2, 2026).
- 19010 Stone Oak PkwySan Antonio, TX 78258 (210) 575‑5200
- 423 Treeline Park, Suite 202San Antonio, TX 78209 (210) 949‑6000
- 502 Madison Oak Dr, Suite 500San Antonio, TX 78258 (210) 499‑6700
Group practices
Medicare enrollment lists Ryan Villarreal as a member of these groups (CMS data updated October 2, 2026).
- Emergenchealth PLLC1,056 clinicians in the group
- Orthomed Staffing LLC416 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Texas →
Other nurse anesthetists in San Antonio
Clinicians with the same Medicare primary specialty in San Antonio, TX — not a recommendation.
Other clinicians in Emergenchealth PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1871227835 |
| 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