Today, team-based health care is no longer an innovation or even a choice. Increasingly, providers are using a team-based approach to deliver care, and the complexity of health problems facing many Americans, combined with the specialization of health professionals, makes teamwork and team training essential. This is especially true for dealing with factors that contribute to chronic conditions and for treating people with multiple chronic diseases-a group already comprising one-fourth of all Americans and two-thirds of people of age 65 or older (CDC, 2013, p. 6). For individuals and families, health-related interactions occur in multiple settings. While these interactions often involve physicians and nurses in various disciplines and types of positions, they also involve physician assistants, pharmacists, dietitians and nutritionists, oral health professionals, eye care professionals, podiatrists, rehabilitation therapists, social workers, mental health and substance abuse therapists and counselors, health educators, speech-language-hearing pathologists, along with arrays of technologists and technicians, nursing assistants and aides, facilitators of health insurance coverage and socially aware care, clerks, translators, and administrators. Growing evidence suggests that to achieve the Triple Aim of improving the experience of care, improving the health of populations, and reducing percapita costs of health care (Berwick et al., 2008), these health care professionals and workers must function interdependently, supporting and communicating with one another, coordinating services efficiently, and focusing their attention on the whole patient. In the public health sphere, too, success is increasingly a function of teamwork. The ecological model of public health emphasizes interactions on the individual, organizational, community, and policy levels that affect multiple determinants of health, including social factors. These complicated interactions require multifaceted interventions (IOM, 2002) that recognize "a web of causation, in which multiple different influences interact to produce good or poor health" (Russo, 2011, p. 87). Broad population health improvement initiatives often focus on partnerships. For example, the National Diabetes Prevention Program includes public-private partnerships of community organizations, private insurers, health care organizations, employers, and government agencies to promote local evidence-based lifestyle change programs for people at high risk of type 2 diabetes (NDIC, 2013; CDC, 2014). Conceivably, this model could be replicated across other chronic diseases and be expanded broadly. Another example is Million Hearts®, a national initiative that combines actions by layers of organizational partners on the national, state, and local levels to prevent heart attacks and strokes (HHS, 2014a). Public health practitioners also collaborate on specific projects with community development practitioners, such as bankers and other financial agents, housing officials, educators, and recreat...