Developmental Disabilities Institute

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 chi

ldren 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.

Students in our Children’s Day program have been hard at work crafting Mother’s Day cards and various other notecards fo...
04/30/2026

Students in our Children’s Day program have been hard at work crafting Mother’s Day cards and various other notecards for every occasion. Each card is designed to help you share the perfect note of gratitude or celebration with the special people in your life.
All proceeds from these sales go back to the program, supporting future creative projects and educational opportunities for the students.

❗ONE-CLICK ACTION ALERT ❗We need the legislature and the Governor to include the following investments in the final New ...
04/28/2026

❗ONE-CLICK ACTION ALERT ❗

We need the legislature and the Governor to include the following investments in the final New York State Budget to stabilize vital I/DD supports and services:

✔️A Targeted Inflationary Increase of 4%
✔️Inclusion of Care Coordination Organizations in the TII & Support for our CareForce

Send a message to your legislators and the Governor by clicking https://bit.ly/4cjy1qg. You can email your representatives every day and be sure to spread the word. It only takes a few seconds and can be done every 24 hours.

Thank you.

🥬April is National Garden Month, a time for us to recognize the importance of sustainability and growth. Our greenhouse ...
04/27/2026

🥬April is National Garden Month, a time for us to recognize the importance of sustainability and growth. Our greenhouse team at the Meadow Glen site is a perfect example of our TEAMWORK core value in action. Thank you to everyone involved in maintaining these vibrant spaces that make the workplace greener and more beautiful every day.

Wishing everyone a Happy Administrative Professionals Week for keeping our operations running smoothly! You are invaluab...
04/24/2026

Wishing everyone a Happy Administrative Professionals Week for keeping our operations running smoothly! You are invaluable team members, and we thank you for your hard work and dedication.

On behalf of the whole team, we would like to share a sincere thank you to our premier sponsor, Corporate Synergies and ...
04/22/2026

On behalf of the whole team, we would like to share a sincere thank you to our premier sponsor, Corporate Synergies and all of our sponsors and supporters who are making DDI's 26th Annual Golf Classic possible.

For over six decades, your support has helped serve as the foundation for children and adults with autism and other developmental disabilities.

Register now👉 https://bit.ly/4dsW3R0

This students from the Children's Day Program created an out-of-this-world mural—featuring the Artemis spaceship—for S...
04/22/2026

This students from the Children's Day Program created an out-of-this-world mural—featuring the Artemis spaceship—for Senator Mario R. Mattera's Earth Day Program! Selected works will be featured on the Senator’s website, and participating students will get a personalized Senate certificate.

Let’s wish these creative explorers good luck!

The Brookhaven Youth Bureau is hosting its annual “Brookhaven’s Got Talent” Student Art Show, and students from our Chil...
04/21/2026

The Brookhaven Youth Bureau is hosting its annual “Brookhaven’s Got Talent” Student Art Show, and students from our Children’s Day Program have submitted their personalized, creative artwork. Be sure to check it out!

🗓️ Tuesday, April 28th
🕖 5:30 PM – 7:30 PM
📍 Brookhaven Town Hall in Farmingville

All artwork will remain on display throughout the month of May.

Join us for DDI’s 26th Annual Golf Classic! It's not just about the game; it's about the connections we make and the imp...
04/20/2026

Join us for DDI’s 26th Annual Golf Classic! It's not just about the game; it's about the connections we make and the impact we create together. Bring three friends or come solo and we'll pair you with others on the first tee who also care deeply about our community.

Not a golfer? No problem! Join us for the evening reception for great food and memories. Let's swing for a cause!

Join the fun 👉 https://bit.ly/4cUOVfh

⚠️ACTION ALERT: Help Support I/DD Services! The New York State budget is late this year, which means there is still time...
04/17/2026

⚠️ACTION ALERT: Help Support I/DD Services! The New York State budget is late this year, which means there is still time to advocate! We need your help to ensure the Legislature and the Governor prioritize crucial supports for our community in the final budget.➡️Visit https://bit.ly/4cjy1qg to take action for people with I/DD with a one-click letter.

We need the Legislature and the Governor to include the following investments in the final New York State Budget:

✔️A Targeted Inflationary Increase of 4%
✔️Inclusion of Care Coordination Organizations in the TII

Hats off to neurodiversity! Students from the Children's Day Program had a great time celebrating the beauty of neurodiv...
04/16/2026

Hats off to neurodiversity! Students from the Children's Day Program had a great time celebrating the beauty of neurodiversity. They chose their favorite colors to design a party hat that reflects each person's uniqueness. The world is a much better place because of our differences; we know that different is not less; it is what makes us extraordinary!

Join us for the opening reception of our newest exhibit, The Cottage on Main. This event features the incredible works b...
04/14/2026

Join us for the opening reception of our newest exhibit, The Cottage on Main. This event features the incredible works by artists from DDI. Every piece tells a story, and the best part—100% of the proceeds go directly back to the artists.

Come support local talent, meet the artists, and take home a masterpiece!

Come join the Team! Check out the list of our recruitment events for the month of April. Don't forget to bring your re...
04/13/2026

Come join the Team! Check out the list of our recruitment events for the month of April. Don't forget to bring your resume and get ready to make a difference. 💙💛

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99 Hollywood Drive
Smithtown, NY
11787

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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.”