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About Us Allergy & Asthma Center of Duncanville

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Allergy & Asthma Center of Duncanville is a fully staffed multi-physician group specializing in allergy and asthma treatments.

Harold DelasAlas MD, PharmD, FACAAI, FAAP, FACP

Growing up in the Houston suburbs, Dr DelasAlas realized his calling in health care from two exceptional nurses and role models, his parents. He distinguished himself academically by earning his doctorate degree in Pharmacy at the University of Houston with high honors at the age of 23. He went on to excel in medical school at the  University of Texas  Medical Branch, graduating second in his class and elected in the medical honor society, Alpha Omega Alpha. He trained at one of the most prestigious residency programs in Internal Medicine at the Washington University in St Louis/Barnes Jewish Hospital. He completed his Allergy and Immunology subspecialty training at Creighton University, working under a prominent leader and researcher in the field, Dr Thomas Casale. Upon completion, he received appointment as Clinical Assistant  Professor at the University of Nebraska and Creighton University and trained both resident physicians and medical students. Missing his Texan roots, he moved back and joined the Allergy and Asthma Center of Duncanville in 2014 and has served as medical director since 2015. He has been awarded Fellowship status within the American College of Physicians, American College of Allergy, Asthma, and Immunology, and American Academy of Pediatrics.

Click Here to read Dr DelasAlas’s CV.


Farah Juma, MPAS PA-C

Farah Juma is a board-certified Physician Assistant who joined Asthma and Allergy Center of Duncanville in 2019. She graduated from Emory University in Atlanta, Georgia with her Master of Science in Physician Assistant Studies in 2018. She is originally from Tanzania. She received her undergraduate degree in Neuroscience and Religion from Boston University. Farah has also served time in the medical field as an EMT, Medical Scribe, and Medical Assistant, where she gained invaluable lessons in patient care.


Kevin Nguyen, MPAS PA-C

Kevin Nguyen is a board-certified Physician Assistant, with experience in Emergency/Primary Care medicine, who joined Asthma and Allergy Center of Duncanville in 2020. Kevin is a graduate from AT Still University School of Osteopathic Medicine with a Master of Science in Physician Assistant Studies in 2019. Kevin is from Arlington, Texas, where he completed his Bachelor of Science at University of Texas at Arlington and Master of Public Health in Epidemiology at University of North Texas Health Science Center in Fort Worth, Texas.


Jesse Astorga, MPAS PA-C

Jesse Astorga is a board-certified Physician Assistant who joined Asthma and Allergy Center of Duncanville in 2020. He graduated from Louisiana State University Health Science Center with his Master of Physician Assistant Studies. He is a native Texan and completed his undergraduate degree in Biology at Texas Tech University. He decided to specialize in Allergy and Immunology to help patients improve their quality of life as he has first-hand experience of what it is like to battle with allergies since childhood. In his spare time, Jesse enjoys being outdoors, watching his favorite sports teams, and refining his culinary skills. Jesse looks forward to meeting you and your family!

Feel better, sooner.

Are you an established patient? Feeling under the weather? Are your allergies flared up? We can help! Feel better, sooner. Call us to make an appointment today or complete an online form and we’ll help coordinate an appointment for you ASAP.

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