RecruitingBehavioural interventionPrimary Care Evidence-based Approach for Improving Lifelong HealthThis study investigates the implementation and effectiveness of the Family Check-Up 4 Health (FCU4Health) intervention in primary care settings for reducing cardiovascular disease risk in children. Through a hybrid type 3 cluster randomized factorial trial and innovative technology-based strategies integrated with Electronic Health Records, the study aims to enhance intervention fidelity and engagement. Results will inform scalable approaches to promote child and family health behaviors, improve parenting skills, and potentially reduce child BMI, contributing to significant public health impacts in addressing cardiovascular health disparities.