Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Raul Sergio Villarreal Jr., MD

Individual provider Allergy & Immunology (Internal Medicine) Physician · NPI 1083008908

Raul Sergio Villarreal Jr., MD is an Allergy/Immunology in Live Oak, Texas. Graduated from University of Texas Southwestern Medical School at Dallas in 2015, 11 years ago. Practices with Allergy Institute of San Antonio, PA, a 4-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
11
Trained at
University of Texas Southwestern Medical School at Dallas
Licensed in
TX
In the registry since
2015
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

11515 Toepperwein Rd Ste 201
Live Oak, TX 78233-3166
Phone: (210) 646-6978
Fax: (855) 919-4370
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Allergy & Immunology Physician (primary) Taxonomy 207K00000X · Licence S4411 (TX)
Allergy & Immunology (Internal Medicine) Physician Taxonomy 207RA0201X · Licence S4411 (TX)

Record details

NPI number1083008908
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 28, 2015
Last updated in NPPESSeptember 18, 2025
Certification dateSeptember 18, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyALLERGY/IMMUNOLOGY
Medical schoolUNIVERSITY OF TEXAS SOUTHWESTERN MEDICAL SCHOOL AT DALLAS
Graduated 2015 (11 years in practice)
Group practice Allergy Institute Of San Antonio, P.A. — 4 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount