Introduction: Existing models of medical-dental integration, as well as those from behavioral health care integrated with primary medical treatment, provide a basis for a truly synthesized and expanded model incorporating medical, dental, and behavioral components. Such a comprehensive model allows for collaborative health care serving patients seamlessly without disciplinary silos, promoting optimal whole-person health. This innovative approach is consistent with recent developments in the behavioral and social oral health sciences that include an imperative for their full inclusion in dental health care, research, and education. Methods: Existing models of medical-dental integration are described, along with current models from integrated primary medical and behavioral health care. Using these existing approaches as a basis, a new multilevel model is proposed to include social and cultural determinants of health. Results: Contemporary approaches to providing health care across disciplines include referral to a geographically separate entity, co-location of services, and integrated, side-by-side care. Integration of electronic health records and interoperability are necessary (but not sufficient) factors that affect transdisciplinary health care. Effective communication among health care providers and the need for interprofessional education, comprehensive training, and ongoing cross-disciplinary consultation also are noted as crucial factors in truly collaborative care. Evidence for existing models varies greatly depending on the target population and type of services provided. Conclusions: A fully integrated, transdisciplinary model of health care is possible, theoretically and practically. Combining aspects of extant integrated models and extending them provides opportunity for a greater focus on systemic factors and more emphasis on prevention. Consistent with this new model, medical and dental home concepts can be expanded to that of a person-centered health care home that includes interprofessional practice. This transdisciplinary approach contributes to greater health equity given the multilevel approach. Multidirectional integration of diverse disciplines representing the various realms of medicine, dentistry, and behavioral health care is essential for optimal health of all. Knowledge Transfer Statement: This article can be used by clinicians, scientists, administrators, and policy makers in developing and implementing integrated systems of care that provide for patients’ medical, dental, and behavioral health needs.