NADD’s mission is to promote leadership in the expansion of knowledge, training, policy, and advocacy for mental health practices that promote a quality life for individuals with Intellectual and Developmental Disabilities and co-occurring mental health conditions (IDD/MI) in their communities.

Latest Updates

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Staff spotlight: Dr. Harold Kleinert

One day, says Dr. Harold Kleinert with a laugh, his colleagues are going to decide he’s worked enough and tell …

College students in a classroom

HDI LEND welcomes students!

It’s a new school year, and that means new students – and this time, it’s more new students than HDI …

Group photo of campers standing in front of the library on campus

Summer Leadership Experience 2025

It’s hard to figure out what to do after you graduate high school, but there are added complications when you …