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

Holiday Closures 2017

  • April 14–closed after noon for Good Friday
  • May 29–Memorial Day
  • July 3-4–Independence Day
  • September 4–Labor Day
  • November 23-24–Thanksgiving Holiday
  • December 25-26–Christmas Holiday
  • January 1–New Year’s Day

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.



Savannah was born in San Antonio and raised in the small town of Von Ormy, Texas. She moved back to San Antonio in 2011 when she got married. Since the age of four, she dreamed of becoming a nurse. She pursued that dream and earned her nursing degree as an LVN in 2015 from St. Phillips College. Savannah is currently working toward her next goal of becoming a Registered Nurse.



Natalie was born and raised in El Paso, Texas. During high school, she was accepted into and completed the vocational nursing program at El Paso Community College. She is currently working toward becoming an RN through the online program at Texas Tech. She enjoys spending time with her beagle, Khloe, and is actively involved in her church.



Ashley was born and raised in San Antonio. She received her degree from St. Philip’s College. She loves kids and has been working them the past seven years both as an employee and as a volunteer.She currently serves in the student and children’s ministries at her church. Her goal is to on day work as a medical missionary.