This session focuses on providing a foundational understanding of obesity as a disease and equips health care professionals with essential tools for the evaluation and diagnosis of adult and pediatric persons with obesity. The course delves into the basic concepts defining obesity and its pathophysiology. Presenters explore the 4 pillars of obesity treatment, ie, nutrition therapy, physical activity, behavior modification, and medical management. [Note: Continuing education credits earned at this session count as group 2 credits toward the American Board of Obesity Medicine qualifications for certification via the CME pathway.]