Practical models of ways to enhance service delivery are sorely needed to help close the gap between research and practice. An evidenced-based model of chronic-illness management is shown to apply equally to preventive interventions. Successful examples of prevention programs in cancer screening and counseling for health behavior change illustrate the utility of the model for prevention and across different types of health care organizations. Although there are some important differences between interventions required for chronic disease management and prevention, there are a greater number of common factors. They share the need to alter reactive acute-care-oriented practice to accommodate the proactive, planned, patient-oriented longitudinal care required for both prevention and chronic care.