Welcome to our website!

Welcome to the orthodontic office of Dr. Zadnik-O’Connell, Dr. Cuoccio and Dr. Hoelz conveniently located in New Hyde Park and Islip, New York. Our doctors are proud to offer outstanding orthodontic care for the entire family in a clean, relaxing atmosphere. We offer a wide range of orthodontic treatment to meet the needs and desires of each individual patient.

Our team of skilled professionals is dedicated to providing each of our patients with the compassionate and individualized care they deserve. We feature a comprehensive set of orthodontic options, from traditional systems to revolutionary new technology, to ensure that we have an orthodontic solution that will be perfect for you, regardless of your age or orthodontic needs. Using our precise mix of cutting-edge technology and time-proven methods, we will work to give you a smile you can be proud of!

Schedule your appointment with Dr. Zadnik-O’Connell, Dr. Cuoccio and Dr. Hoelz today.


Margaret Zadnik-O'Connell, DDS, PC
412 Jericho Turnpike
New Hyde Park, NY 11040

South Bay Orthodontics
439 Main Street
Islip, NY 11751