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Developmental Disabilities Institute
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DDI At A Glance
Message From Our Executive Director
Early Childhood 0-5 Years
School Age 5-21 Years
Adult 21+ Years
Support and Advocacy
Frequently Asked Questions
Guide to Acronyms
Social Media Icons/Picture for Pasting
Acceptance - Unity through Art
John and Ellen's Wedding
Walk in the Park & Family Picnic
Dancing for Autism
School Safety Improvement Campaign
Join Our Team
The Welcome Wagon
The American Flag
Developmental Disabilities Institute (DDI) has been assisting individuals with developmental disabilities and their families on Long Island for more than 50 years.
During that time, we have evolved and grown, serving larger numbers of people and expanding the types of supports and services we provide.
Our evolution has always been focused on delivering on our mission to help children and adults with autism and other developmental disabilities experience growth and fulfillment.