Welcome to Gateway Pediatrics

Raising happy and healthy kids is your top priority, and it's ours too. Our pediatric office, located in Chesterfield, is a fun, welcoming space where kids feel comfortable and at ease. Our dedicated team of pediatricians and staff believes every child deserves personalized attention and care, and we take the time to get to know each family, building strong, trusting relationships that last. From routine well-child visits and same-day sick visits to essential immunizations and specialized pediatric care, we support every step of your child’s healthcare journey.

Our Services

A man and woman are holding a baby in their arms.
A little girl is blowing her nose with a napkin while laying on a bed.
A football player with the number 32 on his jersey is running with the ball
A little girl is being examined by a doctor with a stethoscope.

Meet Our Providers

Dr. John Gleeson

Dr. John Gleeson
Amber Johnson, PA-C

Amber Johnson, PA-C
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What Our Parents Say

I can’t express my gratitude and appreciation for Dr. Brian J. Saville! He is so good doctor! My son was so scared of doctors before, but he loves him! Whenever we had a concern about anything he was there to support us and double check everything so we are sure that everything is okay! We feel so safe with him and we truly, deeply trust him! I know people usually don’t have time to write good reviews but this man deserves much more! So happy we found him!
This practice is amazing! They truly care about my son, since the day he was born. Any time I have a question or concern, they get me right in. They are so kind and patient. I'm blessed to have found them!
Dr. Saville will be greatly missed!! We have been coming here for 21 years, between the old DePaul office and now St. Lukes. Have a few more years to go, my oldest is 25(started here at 4yrs old), middle son is 21, and my youngest is 16. Dr. Gleeson and the staff are great! Even moving from the area, I will drive the 35 minutes to know my son will be seen by a doctor that cares about concerns, explains thoroughly and practices patience.
We’ve been going to this practice for over 13 years - staff is always incredibly helpful and we love Amber and Dr. Gleeson. I also appreciate that they make every effort to get us in the same day when we are dealing with an unexpected illness.
Been part of the Gateway pediatrics family since my son was born, north of 15 years now. Always responsive always quality medical care. Dr. Gleeson spent the first portion of his career as the emergency room pediatric doctor. His cool, Calm and Collected. The kind of guy you want to be your doctor.
I can’t express my gratitude and appreciation for Dr. Brian J. Saville! He is so good doctor! My son was so scared of doctors before, but he loves him! Whenever we had a concern about anything he was there to support us and double check everything so we are sure that everything is okay! We feel so safe with him and we truly, deeply trust him! I know people usually don’t have time to write good reviews but this man deserves much more! So happy we found him!
This practice is amazing! They truly care about my son, since the day he was born. Any time I have a question or concern, they get me right in. They are so kind and patient. I'm blessed to have found them!