About Us


Meet our team at Canterbury Pediatrics! Please take a few moments to learn about our skilled practitioners and our friendly, nurturing staff.

At Canterbury Pediatrics, we consider it both a great joy and responsibility to care for children.  We all are parents ourselves, so we strive to be understanding and available to the families we are privileged to serve.  We are honored that you have chosen us as your child’s primary medical provider and are confident that you will be pleased with the quality of care and service that we can provide you and your family.

A vital part of our service to children begins with our outstanding staff who works hard to manage and maintain a professional, caring and supportive environment for our patient in a timely manner.  Our doctors are lifelong learners.  Not only have they received advanced medical training in pediatrics, they continually pursue ongoing education to stay abreast of the latest in child health care.

Your child’s health is as important to us as it is to you.  We look forward to providing you with excellent pediatric care.

Marilyn Smith, M.D., F.A.A.P. Marilyn Smith, M.D., F.A.A.P.

Dr. Marilyn Smith is an exceptionally skilled pediatrician who strives each day to treat her patients with optimal care.  She has a vast fund of knowledge in pediatric medicine and has been a pediatrician for over 20 years.  Dr. Marilyn received her Bachelor’s Degree in Biology from Yale University and then earned her MD at the University of Cincinnati, College of Medicine.  She completed her residency training at Yale New Haven Hospital and is Board Certified by the American Board of Pediatrics.  In 1999, Dr. Marilyn was selected as Top Doctor by Connecticut Magazine and again in 2006 by New York Magazine.  She more recently received a Patients’ Choice recognition's award.  Dr. Marilyn has a cheerful personality that puts her patients and families at ease.  She truly enjoys what she does.

John Tsalapatanis, M.D., F.A.A.P. John Tsalapatanis, M.D., F.A.A.P.

Dr. John Tsalapatanis is an experienced, Board Certified Pediatrician who has dedicated his life to keeping his patients healthy and happy.  Dr. John graduated with a Bachelor’s Degree in Biology from Fairfield University.  He received his Doctor of Medicine Degree from Ross University School of Medicine in Dominica, West Indies and trained in pediatrics at Overlook Hospital in Summit, NJ.  In his third year of residency training, he served as Chief Resident.  Having been a pediatrician for over 20 years, it’s no surprise that Dr. John has grown a special bond with his patients making the visit to the doctor an enjoyable experience.  Child care is not solely an occupation; it is a living that Dr. John pursues with a passion.

Gretchen Carlin, A.P.R.N., I.B.C.L.C. 


Gretchen is a Board Certified Pediatric Nurse Practitioner. She loves working with children of all ages but has a special passion for providing breastfeeding support. She is an International Board Certified Lactation Consultant (IBCLC) and has been providing breastfeeding support for more than 4 years . Gretchen graduated from the United States Military Academy with a Bachelor of Science in Geography. After six years as an Army Officer, she switched careers and earned a Master's of Science in Nursing from Boston College. During her time at Boston College, she had clinical placements at Boston Children's Hospital and Massachusetts General Hospital as well as several independent Pediatric Primary Care practices. Gretchen aims to build strong relationships with families to foster each child's growth, development and health.

Amanda Nederlof, APRN 


Amanda is the newest member of the Canterbury Pediatrics team. She joins asa board certified Pediatric Nurse Practitioner, who graduated from the Yale School of Nursing in 2018. She is a member of Sigma Theta Tau, the International Honor Society of Nursing. During her time at the Yale, Amanda focused her work in clinical environments with children, which included the school based setting, community health, as well as the private practice setting. Her specialty rotation through pediatric Ear, Nose, and Throat has particularly stuck with her and she enjoys taking this specialty knowledge with her into the primary care office. During her schooling, she worked as an Registered Nurse at the Yale Health Center in the Pediatrics and also spent a summer working as a camp nurse for a local CT summer. Most recently, she has worked as an APRN in the East Lyme area before moving with her husband closer to family in the Fairfield county area. When not working, you can find her reading a good mystery novel, hiking, playing her favorite sport, tennis, or spending time with close family and friends Amanda is looking forward to providing patient-centered care for children and their families and hopes that she can help make coming to the pediatric office a fun, interactive experience for everyone.


Contact Us

Location & Hours

Our Location

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Hours of Operation

Our Regular Schedule

Map and Location


8:30 am-5:00 pm


8:30 am-5:00 pm


8:30 am-5:00 pm


8:30 am-5:00 pm


8:30 am-5:00 pm


8:30 am-12:00 pm

Same Day Sick Appt. Only


Appt. made per on-call doctor