Abstract Despite the recognition that behavioral and medical health conditions are frequently intertwined, the existing health care system divides management for these issues into separate settings. This separation results in increased barriers to receipt of care and contributes to problems of underdetection, inappropriate diagnosis, and lack of treatment engagement. Adolescents and young adults with mental health conditions have some of the lowest rates of treatment for their conditions of all age groups. Integration of behavioral health into primary care settings has the potential to address these barriers and improve outcomes for adolescents and young adults. In this paper, we review the current research literature for behavioral health integration in the adolescent and young adult population and make recommendations for needed research to move the field forward.