The document discusses the medical and mental health needs of children in foster care in Maine. It finds that children in foster care have high rates of chronic medical conditions, developmental delays, and behavioral disorders. Placement instability is also associated with worse health and mental health outcomes. A program called PREP provides comprehensive health assessments for children entering foster care. Data on thousands of children shows that those receiving PREP assessments have better health outcomes, lower rates of obesity, dental problems and use of psychotropic medications compared to children not receiving PREP assessments. PREP participants also have lower average monthly health care costs for the state Medicaid program.