Developmental Disabilities Institute

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Smithtown, NY
Developmental Disabilities Institute

We help children and adults with autism and other developmental disabilities experience personal growth and fulfillment.

For more than 60 years, Developmental Disabilities Institute (DDI) has provided compassionate personal care to meet the emotional, educational, therapeutic, and vocational needs of children and adults with autism and other developmental disabilities. Founded by parents of children with developmental disabilities, DDI has grown into a dynamic, nonprofit, multi-site agency serving more than 1600 children and adults in our care each day. The parental influence continues with several of our board members being mothers and fathers of the people we serve. DDI recognizes that each person in our care has unique needs and deserves every opportunity to live a rich and meaningful life. Over six decades, we have built a strong reputation for providing exceptional services for all people in our programs, and in particular those who present with the most significant challenges. With a workforce made up of people inspired by purpose®, DDI provides the highest standards of individualized services from expertly trained, caring, and competent staff. For more information, visit www.ddiny.org.

01/09/2026

📅Mark your calendars for DDI's upcoming events. Join us as we come together to support our mission and make a meaningful difference for the children and adults in our care.

01/06/2026

🎙️Episode 5 of the [EYE] on Autism Podcast -- brought to you by DDI has dropped.

Dr. Michael Romas continues his discussion with neurodivergent communication specialist and author Tim Goldstein. Part two of this powerful conversation is now live on:

✔️Spotify - https://bit.ly/4q2QdJi
✔️YouTube - https://bit.ly/3Ngfnpg
✔️Apple Podcasts - https://apple.co/49qLhqG
✔️Our website - https://bit.ly/483U6az

👉 Listen now and be sure to join in on the conversation.

01/05/2026

Join us tomorrow for our first Blood Drive of the year at the Smithtown campus. January is National Blood Donor Month, making it the perfect time to roll up our sleeves and help save lives. We hope you'll donate with us.❤️

Be a lifesaver and register today.

Smithtown Blood Drive Registration https://bit.ly/4sl12rA
Huntington Blood Drive Registration https://bit.ly/3YdZx0R

01/02/2026

This holiday season, our Children's Residential Program hosted its annual Winter Wonderland Tree Lighting and annual Menorah Lighting. The festivities included a winter walk through of holiday decorations, pictures with Frosty the Snowman, a hot cocoa bar and a candle-lit menorah lighting!

What a fun and cheerful way to celebrate the holidays! 🎄🕎

12/31/2025

🎉 Happy New Year! We are so grateful for all of YOU! The people we care for and their families, our workforce, followers, and supporters. Here's to fresh beginnings, shared successes, and a year filled with possibilities.

12/30/2025

We now have TWO Blood Drive locations! Kick off the new year by giving back—join us at one of our upcoming Blood Drives. Be a lifesaver and register today. ❤️

Smithtown Blood Drive Registration ➡️ https://bit.ly/4sl12rA
Huntington Blood Drive Registration ➡️ https://bit.ly/3YdZx0R

12/29/2025

Every gift to transforms lives, turning compassion into opportunity and inclusion. Your support provides therapies, programs, and care that help children and adults with autism and other developmental disabilities need to reach their full potential.

This is what transformation looks like, and it’s made possible by you.💙

Donate Now ➡️ https://bit.ly/49fcdcK

12/26/2025

Happy Kwanzaa! As we reflect on the values of unity, purpose and caring for one another, we celebrate the importance of family and community.

12/24/2025

Happy Holidays! We are deeply grateful for every member of the DDI Family who makes our mission possible. Wishing you and your loved ones a joyful, healthy holiday season.

12/23/2025

Meet Jimmy and Dora, his Community Habilitation Self-Direction staff. Over the past few weeks, they worked on a holiday basket project for families in need. Together, they planned and shopped for necessities. This ongoing project offered valuable opportunities for Jimmy to strengthen his community-outing, communication, and money-management skills.

The completed baskets were recently delivered to a local church outreach center. Jimmy was excited throughout the entire process and took great pride in giving back to his community. What a meaningful and rewarding experience it was. Jimmy, we applaud all you have accomplished and thank you for your hard work and generosity this holiday season.

Address

99 Hollywood Drive
Smithtown, NY
11787

Website

http://ddiny.org/

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Our Story

Developmental Disabilities Institute (DDI) was founded in 1961, to address the special needs of children with Autism and other developmental disabilities, and provide therapeutic intervention. Today, DDI is a non-profit, multi-site agency serving over 1,500 children and adults with autism and related disorders, providing educational, residential, day habilitation and vocational services across Long Island, NY. DDI’s educational, residential day habilitation and vocational offerings are as diverse as the people we serve. Due to this, we have grown to include 5 main campuses located in Smithtown, Huntington, Medford, Riverhead and Ronkonkoma, NY, as well as 30 residential and day habilitation sites.

Through almost 60 years of sustained effort, DDI has become widely known in our area. Today, we are the largest provider of services and programs for children and adults with autism on Long Island. The goal of our agency is to recognize the needs of each individual while maintaining the highest standards of teaching and training for our children, their families, and our staff. DDI prides itself on being in the forefront of the most effective methods in use today for the treatment of autism and related disorders.

Our Purpose: “We help children and adults with autism and other developmental disabilities experience personal growth and fulfillment.”