The purpose of this study was to evaluate parent response to a clinic-based primary prevention intervention to increase the proportion of 5- to 10-year-old children receiving annual body mass index screening and counseling about physical activity, dietary practices, and sedentary practices. A posttest-only, quasiexperimental design was used. Two clinics that provide routine health care to school-aged children agreed to participate in the pilot study. A multicomponent intervention was implemented in one clinic; the other provided care as usual.