Behavioral medicine services as part of primary care facilities are also being recognized, like this one, as a potential solution to this increasingly prevalent burden of mental health disorders. This detailed review evaluates primary care behavioral health service delivery studies using rigorous analysis methods, looking into its effectiveness, challenges, and influence on patient outcomes. Some of the main issues that the essay examines include teamwork models, screening and testing tools, interventions, and patient involvement. Researchers found that integration of programs is advantageous as they help to enhance access to care and coordination. Still, at the same time, they report significant barriers, namely, stigma, workforce shortages, and reimbursement issues. Directions regarding subsequent studies and practices that characterize the tendency towards behavioral health integration in primary care are forwarded.