Our team of board-certified physicians and medical professionals are experts in the field of allergy, asthma and immunology. Our doctors and nurse practitioners have studied, lectured, researched and treated allergy, asthma and immunology issues for decades, which have resulted in distinguished accreditations and high-level credentials. Our practice, the largest in San Antonio with three clinics located throughout the city, is committed to caring for patients in South Texas.

Board Certified

San Antonio-born, Dr. Diaz followed in his father's footsteps, Jose A. Diaz, M.D., family practitioner, who had a successful medical practice on the south side of San Antonio for 30 years. Dr. Diaz is board certified by the American Board of Internal Medicine and American Board of Allergy and Immunology. Dr. Diaz graduated from St. Mary's University in San Antonio, with high honors and a B.S. in Biology. He received his medical degree from the University of Texas Medical Branch at Galveston, Texas. His internship and residency, as well as his fellowship in Allergy and Immunology, was completed at the University of South Florida College of Medicine. Since opening his private practice, Allergy, Asthma and Immunology Associates of South Texas in 1988, Dr. Diaz has served as clinical...

Board Certified

Dr. Boyar joined Allergy SA in April of 2015. California born, Dr. Boyar graduated with a B.S. in Biology and then received his M.D. from Creighton University in 1985 in Omaha, Nebraska. After finishing internal medicine training in New York and Pittsburgh, he completed his allergy training at Harbor-UCLA Medical Center in Torrance, California in 1990. Dr. Boyar is board certified by the American Board of Internal Medicine and the American Board of Allergy and Immunology. Dr. Boyar was in solo private practice in Huntington Beach, California from 1992 through 2005, and then practiced in Roswell, New Mexico from 2005 through 2014. Dr. Boyar enjoys clinical research and has been published in several medical journals including Immunology and Allergy Practice, AIDs, the Journal of the...

Board Certified

Dr. Karkhanis joined Allergy SA in 2014. Dr. Karkhanis is board certified in Internal Medicine and Allergy and Immunology. Dr. Karkhanis received her medical degree with honors from Seth G.S. Medical College and K.E.M. Hospital in Mumbai, India. She was engaged in research activities at the University of Pittsburgh, after which she completed her internship and residency in Internal Medicine at St. Luke's-Roosevelt Hospital Center and Columbia University in New York, New York and her fellowship in Allergy and Immunology from Washington University School of Medicine and Barnes-Jewish Hospital in St. Louis, Missouri. She is an active participant in national allergy meetings, and has presented and published multiple reports. She is also an active member of the following organizations:...

Nurse Practitioner Board Certified

Ms. Loera joined Allergy SA in January 2012. A native of San Antonio, she attended Health Careers High School and earned her BSN from the UT Health Science Center at San Antonio. During her postgraduate studies at UTHSC, she was inducted into the Sigma Theta Tau International Nursing Honor Society and completed the Family Nurse Practitioner Program with a Master of Science in Nursing degree in 2011. She is dedicated to the fundamentals of her practice and is committed to providing compassionate, patient-centric care, tailored to the individual. She is a member of the American Nurses Association, Texas Nurses Association, National Association of Hispanic Nurses, American Association of Nurse Practitioners and the Texas and San Antonio Allergy, Asthma and Immunology Society. She provides...

Nurse Practitioner Certified

Mrs. Gomez joined Allergy SA in September 2014. She is fluent in English and Spanish and is certified by the American Association of Nurse Practitioners. Mrs. Gomez obtained her Master's of Science degree in nursing with specialization in family nurse practitioner at the University of Texas Health Science in San Antonio (UTHSCSA) in August 2014, and prior to this also received her Bachelor's of Science degree in nursing at UTHSCSA in 2010. Mrs. Gomez is a highly motivated individual who has advanced from medical assistant to registered nurse and, now, a family nurse practitioner. She is experienced in treating both pediatric and adult populations. Mrs. Gomez enjoys learning about each of her patients, and strives to provide excellent patient care. In her free time, she enjoys spending...