Intellectual and developmental disabilities nurses care for patients that have mental, physical or behavioral disabilities, including autism, Aspergers syndrome, Retts syndrome and more. Intellectual and developmental disabilities (I/DD) nurses may help patients with speaking or other communication skills, eating, controlling bodily functions, becoming independently mobile and more. The major organization for intellectual and developmental disabilities nursing, the Developmental Disabilities Nurses Association (DDNA) maintains the Registered Nurse Certification in Developmental Disabilities Nursing (CDDN). The U.S. Bureau of Labor Statistics predicts excellent, overall job growth for registered nurses. The median registered nurse salary is $62,450.