Dr. Raul Sergio Villarreal, MD

Dr. Raul Villarreal specializes in internal medicine with advanced expertise in allergy and immunology. He earned his medical degree from the University of Texas Southwestern Medical Center Medical School and brings 11 years of clinical experience to his practice. His dual specialty training allows him to provide comprehensive care for both general medical conditions and complex allergic disorders.

Dr. Villarreal maintains his hospital affiliation with Northwestern Memorial Hospital and practices at multiple AllergySA locations throughout San Antonio, Texas. He focuses on treating allergic rhinitis and seasonal allergies that affect many patients year-round. His expertise includes performing allergy blood tests to identify specific triggers and providing both traditional allergen immunotherapy and sublingual immunotherapy to help patients build tolerance to their allergens.