St. Jude Heritage Medical Group
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Main: (800) 627-8106
Billing: (714) 449-4800

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St. Jude Heritage Medical Group
P.O. Box 4138
Fullerton, CA 92834-4138


Nothing is more important to parents then their children’s health and well-being. At St. Jude Heritage Medical Group, our pediatricians understand that very well. In fact, nothing is more important to us than keeping children healthy.

Our board certified pediatricians offer comprehensive care for the needs of your child at every age, from newborn care to sports physicals. In addition to the treatment of illness and injuries, our physicians specialize in prevention and helping children develop the habits that lead to a lifetime of health. We’re also committed to giving you the information and advice you need to improve your child’s physical and emotional well-being: whether that means tips on avoiding ear infections or help with developmental disorders.

We not only offer outstanding care, we make it convenient:

  • Five locations to choose from
  • Same day appointments
  • A very useful Nurse Advice Line to answer your questions when your doctor’s office is closed
  • After-hours care for evenings, weekends and holidays

And if more specialized care is needed, we offer a wide range of experts in children’s health, from pediatric dermatologists to specialists in youth sports injuries.

St. Jude Heritage Medical Group is proud to be a CHOC Children's Community Partner.
Click here to read more!

Pediatric Speech Therapy Services

Frequently Asked Health Questions

Is your child feeling under the weather? Wondering if a visit to the pediatrician is in order? Take a look at some of the topics we get the most questions about from parents below for more information about common symptoms:

Our Experts

Anaheim Hills

Jason Jilk MD

Diamond Bar

Sandra Mathur, D.O.


Aeri Kang, MD
Barbara Niklas, NP
Christine Won, MD

La Habra

Michael Reuben, M.D.

Yorba Linda

Marienelle Banez, M.D.
Lauren Choi, DO
Larissa Isterabadi, M.D.
Jonathan Kramer, M.D.
Steve Kwon, M.D.
Lillian Lai-Wu, M.D.
Tanya Mayfield, M.D.

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