happy healthy pediatrics patient portal

Happy Heart Pediatrics Mission Statement

Our purpose is simple…provide a welcoming environment for our patients and our patient’s families. It is our priority and collective passion to utilize our specialized skills in pediatrics and pediatrics cardiology to provide comfort, hope, and the best possible care to our patients.

Pediatric Cardiology

Outpatient cardiac symptom evaluation and care for congenital cardiac patients.

Scheduling Policies

September 4th, 2022 Cancellation, rescheduling and no-show policies. Our time is precious just as the time you have with your kids is, so please see below for our scheduling policies…. Read More

Update for Medicaid and Tricare East

As of August 29, 2022 Due to circumstances beyond our control Happy Heart Pediatrics PLLC is at this time unable to see patients with the insurances of Medicaid and Tricare… Read More

Make an Appointment

If your child has a cold or rash, or if you have any concerns, call to make an appointment with Dr. Chung today!

Patient Portal

For our active families, parents can get shot records, growth information, and more.

Pay Bill

If you’ve received a bill from us, please use the link to submit payment. Thank you!

Meet Your Doctor

Y.C. (Yu-Chen) Jennie Chung, MD, FAAP, is a board-certified pediatrician with 15 years of experience practicing Pediatrician in various settings, including hospitals, urgent care, and clinical offices.

Our Services

Happy Bun Pediatrician is a McKinney Pediatrician that offers a comprehensive suite of services, including:

Keeping babies safe and cool in this hot summer!

It is particularly HOT this summer! But being able to play outside is good for our little babies and kids. It's so important for their emotional and physical growth and development. Some tips from pediatrician at Happy Bun Pediatrics (located in McKinney, Texas) to keep our babies and children safe and healthy this summer:

Breast Milk Storage

Children with a food allergy have an immune system which reacts to certain proteins found in food. In most instances, a food allergy comes on suddenly and can be triggered by even just a small amount of food.