Col. ill. Map. Includes bibliographic references. This publication summarizes the Centers for Disease Control and Prevention (CDC)'s Prevalence of Autism Spectrum Disorders―Autism and Developmental Disabilities Monitoring Network, United States, 2006. MMWR Surveill Summ 2009;58(SS-10) report. The Children’s Health Act of 2000 authorized CDC to create the ADDM Network. Since the network’s inception, CDC has funded programs at 16 sites covering 17 states including Arizona. The other states are Arkansas, California, Colorado, Florida, Georgia, Illinois, Maryland, Missouri, New Jersey, North Carolina, Pennsylvania, South Carolina, Utah, West Virginia, and Wisconsin. This summary shows snapshots of these states, including one for Arizona, as well as state statistical comparisons