Quick answers
- Does Steven M. Villarreal accept Medicare assignment?
- Yes. Medicare's clinician data says Steven M. 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 Steven M. Villarreal see?
- In 2024, CMS data shows 271 Original Medicare patients and 3,035 services for Steven M. Villarreal. This counts Original Medicare only and measures volume, not quality.
- What is Steven M. Villarreal's NPI number?
- 1912318510. 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 Steven M. 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 | 271 |
|---|---|
| Services billed to Medicare | 3,035 |
| Different services or procedures | 15 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Hyaluronan or derivitive, genvisc 850, for intra-articular injection, 1 mg (J7320)1,300 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)670 services
- Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)421 services
- Drug test(s), definitive, utilizing (1) drug identification methods able to identify individual drugs and distinguish between structural isomers (but not necessarily stereoisomers), including, but not limited to gc/ms (any type, single or tandem) and lc/ms (G0482)353 services
- Aspiration and/or injection of fluid large joint using ultrasound guidance (20611)97 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%
- Arthritis75%
- High cholesterol72%
- Anxiety44%
- Diabetes42%
- Ischemic heart disease31%
Practice locations
Addresses where Steven M. Villarreal is enrolled with Medicare (CMS data updated October 2, 2026).
- 1314 E Sonterra Blvd, Suite 2107San Antonio, TX 78258 (210) 541‑0700
- 1919 Rogers RdSan Antonio, TX 78251
Group practices
Medicare enrollment lists Steven M. Villarreal as a member of this group (CMS data updated October 2, 2026).
- William A. Tisdall, M.D., P.A.9 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in San Antonio
Clinicians with the same Medicare primary specialty in San Antonio, TX — not a recommendation.
Other clinicians in William A. Tisdall, M.D., P.A.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2013 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1912318510 |
| 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