ADHD and ADD are neurodevelopmental disorders that require an accurate diagnosis that can only be thoroughly attained through a comprehensive psychological evaluation. It is critical for a differential diagnosis between ADHD/ADD and Pediatric Onset Bipolar Disorder to ensure early and proper treatment interventions including psychotherapeutic interventions (Cognitive Behavioral Therapy), family interventions, social skill development, and the appropriate class of psychotropic medications, if necessary (e.g., stimulant medications such as Adderall versus antipsychotic medications such as Risperidone). Children diagnosed early with a true form of ADHD/ADD tend to have a much better prognosis since the trajectory of symptoms, when misdiagnosed, often leads to subsequent diagnoses of Oppositional Defiant Disorder, Conduct Disorder, and possibly a more stable personological disposition of Antisocial Personality Disorder. Children with ADD/ADHD tend to fall approximately 30% below their same age peers in all areas of adaptive, social, and intellectual functioning. The overreliance by teachers and parents on behavioral rating assessments leads to a Halo Effect when in fact only a comprehensive psychological evaluation or neuropsychological evaluation can only truly identify the correct diagnosis. Early evaluation and correct diagnoses are correlated with better treatment outcomes.