Developmental Disabilities Institute

Home
United States
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.

02/05/2026

The talented students of the Children's Day Program Art Club in Smithtown have brightened our campus waiting room with their one-of-a-kind paintings. The artwork will be on display throughout the Valentine's Day season for everyone to enjoy.

02/04/2026

Relationships are the heartbeat of DDI, so this Valentine's Day—a day all about love and connection—consider honoring someone special with a gift that makes a difference. Visit https://bit.ly/3ZRi6Zk to find out how to turn your donation into a message of love with a card made by the people we support.♥️

02/03/2026

🎙️Episode 6 of the [EYE] on Autism Podcast -- brought to you by DDI has dropped.

On this special Valentine’s Day themed episode Dr. Michael Romas speaks with the Director of YAI Knowledge, Consuelo Senior about all things love and relationships while living on the spectrum.

Listen to “At The Heart of It” now on:

✔️Spotify - https://bit.ly/4qigsuC
✔️YouTube - https://bit.ly/3ZMZFF7
✔️Apple Podcasts - https://apple.co/4qfslBA
✔️Our website - https://bit.ly/4qaJoVd

02/01/2026

For the first day of Black History Month, we're highlighting Maria Davis-Pierre, a Black autistic self-advocate, therapist, author and founder of Autism in Black.

With two children on the spectrum, as well as being diagnosed with autism at age 37, Maria uses her lived experience to amplify the voices of Black individuals and families affected by autism.

She is an advocate for equity, representation and inclusion in the autism community.

01/31/2026

Want to be the boss of the toss? Join us for DDI's 4th Annual Co****le Tournament to support the children and adults in our care. **ALL skill levels are welcome** Every throw makes an impact, so be sure to register today at https://bit.ly/4sQPCfz for a fun-filled family afternoon of co****le and connection.

📅Saturday, March 7th
⏲️1:00 PM — 5:00 PM
📍Pickleball Heaven, 645 National Blvd., Medford, NY

****le2026
****le
****le

01/30/2026

https://www.ddiny.org/apps/pages/index.jsp?uREC_ID=4461091&type=d&pREC_ID=2728525

01/27/2026

Today, we watched with bittersweet pride as Benjamin, a graduate of the Smithtown Children's Day Program, made his way down the school hallway one last time. Everyone loved cheering him on and singing his praises. Benjamin, we are so proud of all you've achieved and could not be more excited to see you spread your wings. Congratulations to you, and may your journey be filled with success, happiness and endless possibilities.

01/26/2026

𝗨𝗣𝗗𝗔𝗧𝗘: ➡️ DDI schools, adult day programs, and administrative offices will be open and operating on a regular schedule tomorrow, Tuesday, January 27, 2026.

01/25/2026

🌨️DDI schools and adult day programs will be closed tomorrow—Monday, 01/26/26—due to the weather. Administrative offices are operating remotely. Please stay tuned for updates as they become available.

01/23/2026

Grab a partner, and join us for DDI's 4th Annual Co****le Tournament to support the children and adults in our care. **ALL skill levels are welcome** Every throw makes an impact, so be sure to register today at https://bit.ly/4sQPCfz for a fun-filled family afternoon of co****le and connection.

📅Saturday, March 7th
⏲️1:00 PM — 5:00 PM
📍Pickleball Heaven, 645 National Blvd., Medford, NY

****le2026 ****le ****le2026 ****le

01/22/2026

We're still collecting lapghans and small blankets for the residents of the Long Island State Veterans Home at Stony Brook University—and we'd love your support! Whether handcrafted with care or generously store-bought, every blanket brings warmth and comfort to those who have served our country.

📅Collection runs through January 30th
📍Deliver to 99 Hollywood Drive, Smithtown, NY 11789

Thank you for helping us honor our veterans in such a meaningful way.

For more info, contact Joyce at joyce.sullivan@ddiny.org or Tracey at tracey.ryan@ddiny.org.

Address

99 Hollywood Drive
Smithtown, NY
11787

Website

http://ddiny.org/

Alerts

Be the first to know and let us send you an email when Developmental Disabilities Institute posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Contact The Practice

Send a message to Developmental Disabilities Institute:

Shortcuts

Want your practice to be the top-listed Clinic in Smithtown?

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.”