NPI registry status
Active
2026 NPPES data Medical Physician Assistant NPI 1336563097 PA-C
Verify on CMS → Sonia Villarreal, PA-C
Medical Physician Assistant in San Antonio, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 40,580 in Medical Physician Assistant, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
2K
Medicare Part D claims · 443 beneficiaries · Medical Physician Assistant avg: 1K
Generic prescribing
88%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Sonia Villarreal, PA-C filed 2,264 Medicare Part D claims in 2023 as a Medical Physician Assistant in San Antonio, Texas, prescribing 88% generic.
- 2K
- Part D claims, 2023
- 88%
- generic prescribing
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Sonia Villarreal, PA-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,264 Top 15% higher than 85% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Sonia Villarreal, PA-C?
Quality data not reportedPrimary specialty
Medical Physician Assistant
Medicare Part D claims
2,264 110% vs specialty avg
Specialty distribution in Texas
How Medical Physician Assistant compares to other specialties among Texas providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Medical Physician Assistant. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Sonia Villarreal, PA-C appears in the CMS NPPES registry as a Medical Physician Assistant provider holding PA-C credentials at 4203 E SOUTHCROSS BLVD, San Antonio, TX, 78222, with a listed phone of (210) 222-0333. NPI 1336563097 was issued on 02/14/2014.
Medicare Part D records for calendar year 2023 show 2,264 prescription claims written by this provider, covering 443 Medicare beneficiaries and totaling roughly $199K in drug spend, split 11% brand-name and 88% generic by claim count, with an opioid prescribing rate of 0.9%.
Medical Physician Assistant is a mid-sized specialty nationwide, with 40,580 enrolled providers across 55 states and an average of 1,077 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1336563097 |
|---|---|
| Specialty | Medical Physician Assistant |
| Credentials | PA-C |
| Gender | Female |
| NPI Issued | 02/14/2014 |
Hospital and facility affiliations
Facilities where Sonia Villarreal, PA-C bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Physician Primecare, Inc
San Antonio, TX
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Texas TMB 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~77K Texas medical licensees in 2023 - they are NOT specific to Sonia Villarreal, PA-C. To verify Sonia Villarreal, PA-C's current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Sonia Villarreal, PA-C - brand share 11.0%
Medical Physician Assistant average
11% brand-name claims vs 88% generic, on 2,264 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
2,264
Total Claims
$199K
Total Drug Cost
443
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 5,324
- Total Day Supply
- 152,680
- Brand vs Generic
- 11% brand / 88% generic
- Brand Drug Cost
- $152K
- Generic Drug Cost
- $46K
- Opioid Claims
- 21 (0.9% rate)
- Antibiotic Claims
- 126
Patient Demographics
- Average Patient Age
- 73.8 years
- Avg HCC Risk Score
- 1.36
- Gender Split
- 58% female / 42% male
- Age Distribution
- <65: 30, 65-74: 208, 75-84: 153, 85+: 52
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Sonia Villarreal, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
110 claims
- Amlodipine Besylate
Amlodipine Besylate
109 claims
- Levothyroxine Sodium
Levothyroxine Sodium
99 claims
- Lisinopril
Lisinopril
74 claims
- Losartan Potassium
Losartan Potassium
74 claims
- Montelukast Sodium
Montelukast Sodium
70 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
68 claims
- Metformin Hcl
Metformin Hcl
58 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 110 |
| Amlodipine Besylate | 109 |
| Levothyroxine Sodium | 99 |
| Lisinopril | 74 |
| Losartan Potassium | 74 |
| Montelukast Sodium | 70 |
| Rosuvastatin Calcium | 68 |
| Metformin Hcl | 58 |
| Simvastatin | 52 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 51 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Medical Physician Assistant Overview
How Sonia Villarreal, PA-C fits within the Medical Physician Assistant landscape nationally.
40,580
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,077
Avg Claims per Provider
Sonia Villarreal, PA-C's 2,264 claims are above the specialty average of 1,077.
Nearby Medical Physician Assistant Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Villarreal.
Sofia Abdulaziz
Dallas, TX
Dr. Julia Abell
PA
New Braunfels, TX
Dr. Latoya Abernathy
PA-C
Pearland, TX
Dr. Ayat Aborahma
PA-C
Plano, TX
Dr. Michael Abrego
PA-C
Texas City, TX
Compare Medical Physician Assistant nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Texas medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Medical Physician Assistant peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Sonia Villarreal, PA-C's specialty? ▼
Sonia Villarreal, PA-C specializes in Medical Physician Assistant and practices in San Antonio, Texas. Credentials: PA-C.
How much does Sonia Villarreal, PA-C prescribe under Medicare Part D? ▼
In 2023, Sonia Villarreal, PA-C wrote 2,264 Medicare Part D claims totaling $199K in drug costs for 443 beneficiaries.
Where is Sonia Villarreal, PA-C located? ▼
Sonia Villarreal, PA-C is located at 4203 E SOUTHCROSS BLVD, San Antonio, TX, 78222. Phone: (210) 222-0333.
What is Sonia Villarreal, PA-C's NPI number? ▼
Sonia Villarreal, PA-C's National Provider Identifier (NPI) is 1336563097, issued on 02/14/2014.
Does Sonia Villarreal, PA-C prescribe more brand-name or generic drugs? ▼
Sonia Villarreal, PA-C's prescribing is 11% brand-name and 88% generic drugs by claim count, with $152K in brand drug costs.
Does Sonia Villarreal, PA-C prescribe opioids? ▼
Yes, Sonia Villarreal, PA-C had 21 opioid claims in 2023 with an opioid prescribing rate of 0.9%.
How many Medical Physician Assistant providers are there in the US? ▼
There are 40,580 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,077 Medicare Part D claims per year.
What drugs does Sonia Villarreal, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Sonia Villarreal, PA-C's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Sonia Villarreal, PA-C accept Medicare? ▼
Sonia Villarreal, PA-C appears in CMS Medicare data with 2,264 Part D claims and 443 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Sonia Villarreal, PA-C's credentials? ▼
Sonia Villarreal, PA-C's NPI is 1336563097 with credentials PA-C. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.