In summary, ADHD prevalence within the hawk-i population is similar to that found nationally when both diagnosis code and filled prescription are used to determine whether a child or adolescent has ADHD. Additionally, children and adolescents within hawk-i diagnosed with ADHD are likely to have seen a psychiatric provider despite state shortages in pediatric psychiatry and psychology. Finally, determining ADHD prevalence using claims/encounter data may result in different estimates than those found using parental reports from a survey. Both estimates may be useful for identifying children with ADHD or at risk of being diagnosed with ADHD, but they are indeed different.