In an effort to understanding the challenges and opportunities of providing essential components of care for people with mental health and substance use disorders in primary care settings, the National Academies of Sciences, Engineering, and Medicine's Forum on Mental Health and Substance Use Disorders convened three webinars held on June 3, July 29, and August 26, 2020. The webinars addressed efforts to define essential components of care for people with mental health and substance use disorders in the primary care setting for depression, alcohol use disorders, and opioid use disorders; opportunities to build the health care workforce and delivery models that incorporate those essential components of care; and financial incentives and payment structures to support the implementation of those care models, including value-based payment strategies and practice-level incentives. This publication summarizes the presentations and discussion of the webinars.