Home > Mental Health > Autism-What Is PDD? Get the Flash Player to see this player. Rate: (Click the stars to rate) Published on Sep 26, 2011 by Cmfhp1, Views: 4220 PDD stands for Pervasive Developmental Disorder. It is an umbrella category where a number of autism diagnosis falls under. This would include autism, PDD-NOS (Pervasive Developmental Disorder-Not Otherwise Specified) and Asperger's Syndrome. Watch this video to learn more.