ADD and/or ADHD Diagnosis and Childhood Mental Disorders for SSI and SSD Childhood SSI and SSD mental disorders as defined by the Social Security Administration (SSA) are categorized just as adult SSI and SSD disorders are catagorized. The listings can be found here: http://www.ssa.gov/disability/professionals/bluebook/112.00-MentalDisorders-Childhood.htm This represents the most common Childhood Mental Disorder.  Childhood mental disorders consider activities appropriate to children, such as learning, growing, playing, maturing, and school adjustment, are also different from the activities appropriate to the adult and vary widely in the different childhood stages. Lee Ann Torrans:  I no longer practice law.  Please see Terms of Use for [...]