Patient Portal. Reviews: ... He completed a fellowship in Allergy and Clinical Immunology at the Children's Hospital of Los Angeles. He has a special interest in Asthma, anaphylaxis, allergen immunotherapy, and immunodeficiency. ... 3140 Legacy Drive, Ste. 120 Frisco, TX 75034 [Get Directions] (972) 566-7788 (972) 566-8837. Shot Hours..