In fiscal year (FY) 2010-2011, the State of Colorado Department of Health Care Policy and Financing (the Department) contracted with Health Services Advisory Group, Inc. (HSAG), to conduct an evaluation on the impact of the Client Health Profile Intervention in improving preventive service use among five target populations.1 Major findings from the evaluation suggested that although Colorado Medicaid members in the intervention group appeared to be more likely to visit their physicians within five months of receiving a client health profile letter, several factors in the intervention's original design could be improved to bring about a more positive impact in preventive service use.