Raul Sergio Villarreal Jr., M.D.
NPI 1083008908ActiveIndividual· Allergy & Immunology· Live Oak, TX
Allergy & Immunology (M.D.) in Live Oak, Texas, trained at University of Texas Southwestern Medical School at Dallas (class of 2015). In 2024 Medicare paid $173,764 for 159 patients, and Part D covered 554 of their prescriptions, 55% of them generic. Genzyme Corporation was the largest of 18 companies reporting payments in 2025, $1,808 in all, mostly food and beverage.
Overview
| NPI | 1083008908 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 28, 2015 |
| Last updated in NPPES | Sep 18, 2025 |
| Certified by provider | Sep 18, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | S4411 | TX |
| Internal Medicine, Allergy & Immunology | 207RA0201X | S4411 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Allergy/Immunology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 159 |
|---|---|
| Services billed | 7,890 across 26 procedure codes |
| Paid by Medicare | $173,764 |
Part D prescriptions in 2024
| Prescriptions (claims) | 554 · 771 30-day fills |
|---|---|
| Patients | 162 |
| Total drug cost | $218,628 |
| Generic share | 55% of claims |
Education and affiliations
| Medical school | University of Texas Southwestern Medical School at Dallas |
|---|---|
| Graduation year | 2015 |
| Medicare specialty | Allergy/Immunology |
Medical group
- Allergy Institute of San Antonio, P.A.Live Oak, TX · 4 clinicians
Industry payments (Open Payments)
- 2025$1,808 · 65 payments from 18 companies
- 2024$2,433 · 123 payments from 21 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $375.39 | 5 |
| Glaxosmithkline, LLC. | $284.14 | 11 |
| Astrazeneca Pharmaceuticals LP | $264.95 | 19 |
| Genentech USA, Inc. | $150.15 | 2 |
| Sanofi-Aventis U.S. LLC | $129.74 | 5 |
What the 2025 payments were for
- Food and Beverage$1,774 · 64 payments
- Education$34.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Allergy & Immunology providers in Live Oak
- 1013091586