Our Doctors & Staff

Jessy John, MD

Dr. John has been practicing in Chester County for over 15 years. She earned her Medical Degree from  the Medical College of Trivandrum in India. She completed her 3 year pediatric residency program at Albert Einstein Medical Center in Philadelphia. She is board certified in Pediatrics and is a Fellow of the American Academy of Pediatrics. She has a special  interest in the management of seasonal allergies and asthma. 


Dr. John and her husband are raising their two boys in Downingtown.   Her hobbies include cooking and music and they both enjoy watching their boys play baseball. Her favorite baseball team is the Philadelphia Phillies.

Constantine Serkes, MD

Dr. Serkes has been practicing pediatrics in Chester County since 1990. He received his undergraduate degree from the University of Rochester where he earned his B. S. in Biochemistry. He received his Medical Degree from the University of Medicine and Dentistry of New Jersey – Robert Wood Johnson Medical School at New Brunswick in 1987. He then completed a three-year residency in Pediatrics at the University of Maryland Hospital in Baltimore, MD. He is certified by the American Board of Pediatrics and is a Fellow of the American Academy of Pediatrics. 


He has a special interest in treating Attention Deficit Disorder, bedwetting in school-age children and Celiac disease. Dr. Serkes and his wife are raising their three boys in Chester Springs, PA. (Dr. Serkes' favorite baseball team is the New York Mets; he is required to pay an additional stipend to remain here in Downingtown.)

Christopher J. Meyer, MD

Dr. Meyer has been practicing pediatrics in Chester County since 2000. He received his undergraduate degree from Grove City College. After college, he earned his Medical Degree from Hahnemann University in Philadelphia, PA. He then completed a three-year residency in Pediatrics at St. Christopher's Hospital for Children.  He is certified by the American Board of Pediatrics and is a Fellow of the American Academy of Pediatrics.


Dr. Meyer thoroughly enjoys running with his portuguese water dog, Lucy; woodworking, basketball, and hiking; and most of all, spending time with his wife and three wonderful children, Maria, Sam and Hadley.

Meghan Belamorich, MD

Dr. Belamorich was raised in Overbrook, PA. She received her Bachelor’s Degree in Biology with a minor in Bioethics from St. Joseph’s University, then completed medical school at Drexel University College of Medicine. She recently finished a Family Medicine Residency at Reading Hospital.


In addition to seeing adult patients at CMMD and Associates, Dr. Belamorich will also be seeing pediatric patients at Healthy Steps Pediatrics. This is the perfect fit for her training as well as her passion to see patients of all ages.


Dr. Belamorich and her husband, John Ryan, have been together for 12 years. They have two amazing and super silly children, Charlotte and PJ. She enjoys chasing them around while going on adventures to various museums. She also loves to run, kickbox, travel, and try new restaurants.  

Sarah Smith, CRNP

Sarah received her bachelors degree from Carlow University in 2013. She gained experience working at The Children's Hospital of Pittsburgh and in the Children's Emergency Department at Lehigh Valley Hospital before returning to graduate school. Sarah holds a Master's degree from Gwynedd Mercy University and has been working as a Pediatric Nurse Practitioner since 2017. She is certified in Pediatric Primary Care from the Pediatric Nursing Certification Board. Her interests include breastfeeding, infant care and helping adolescents create healthy lifestyle habits. 


Sarah lives in Montgomery County with her husband, Caleb, their daughter, Lexie, and their golden retrievers, Jax and Enzo. In her spare time, she enjoys gardening, running, biking, and being outdoors.

We're Hiring!

We are adding a pediatrician to our rapidly growing practice.

Email your resume with references to:






Academic Approach

to Medicine

Partnership Potential

(a rare opportunity

these days!)


On-Call Schedule

No C-Section


Monica Perme, CRNP

The newest member of our team, Monica has been a nurse since receiving her BSN from the University of Minnesota in 1985. After serving in the USAF and working in a multitude of settings, she returned to school and obtained a MSN from the University of Pennsylvania. She has been working as a Pediatric Nurse Practitioner since 2011 and began with Healthy Steps Pediatrics in November 2020.


Monica lives in Downingtown near her 3 grown children. When not at work, she is likely hiking, gardening, refinishing wood, or playing the mandolin.

Healthy Steps Pediatrics, LLC

Jessy John, MD

Christopher Meyer, MD

Constantine Serkes, MD

Megan Belamorich, MD

© Healthy Steps Pediatrics, LLC.

Logo by Leigh Friedman Prescott. Website by Laura A. Mikowychok Design & Media, LLC.

750 W. Lincoln Hwy

Exton, PA 19341

Office: (610) 363-7837

Fax: (610) 363-3923