Here are a few things you should know about us:

We believe every child is special and unique: an extraordinary gift from GOD! We want to partner with you to provide them with the best healthcare possible. We will strive to create a warm and welcoming atmosphere from start to finish. We will take the time needed to engage, listen and address all your concerns. We will communicate clearly and effectively. We will care always. And we will smile and laugh as much as possible.

Wonder Kids Pediatrics 20818 Gathering Oak, Suite 109 San Antonio, TX 78260 phone: (210) 762-6464 fax: (210) 762-6465


We do not accept walk-ins

We do our best to keep room in the schedule for same-day sick visits for patients who call ahead to schedule. If you show up without calling ahead, you will be asked to schedule and appointment and return later.


  • Monday – Friday: 8:00 – 5:00 (appointment slots from 8:30 – 4:30); closed from 12:00-1:00 for lunch
  • Saturday – Sunday: closed


Dr. Demetrios Leiloglou

pediatrician, owner

Dr. Demetrios Leiloglou always knew he wanted to work with kids. A graduate of Texas A&M and Baylor College of Medicine, he completed his residency here in his home city of San Antonio, Texas at the UT Health Science Center. Dr. Leiloglou has been a pediatrician since 2001, the year he married his wife Carolyn. Together they have four wonder kids of their own. When he’s not working hard taking care of kids or playing with his own, Dr. Leiloglou loves encouraging others through his songwriting.

Dr. Elizabeth Owen


Dr. Elizabeth Owen enjoys caring for kids in the whole range of pediatrics, from newborn to adolescent. After graduating from Duke University, she moved to her home state of Florida to complete medical school at the University of Florida College of Medicine.  She then completed a pediatric residency at the University of North Carolina. She is board certified in General Pediatrics.  In her free time, Elizabeth enjoys walking, being involved with her church, and spending time with her husband, Curt, and their two daughters. One of her favorite things about working with kids is enjoying the cute and original things they say and do.