Perioperative medicine is evolving from a fragmented, specialty-specific practice into a collaborative, patient-centered discipline that unites anesthesiology, internal medicine, surgery, nursing, and other allied health professionals. This transformation is driven by the increasing complexity of surgical patients, the rise in multimorbidity, and the demand for improved outcomes across the surgical continuum. Perioperative care now extends beyond the operating room, encompassing preoperative optimization, intraoperative physiology, and postoperative rehabilitation, with continuity that bridges hospital and outpatient medicine. Internists play a central role in this model, providing expertise in chronic disease management, risk stratification, and longitudinal care, while anesthesiologists bring expertise in acute perioperative physiology, airway management, and intraoperative decision-making. The integration of these skill sets represents the foundation of modern perioperative medicine. Emerging models such as the perioperative surgical home, enhanced recovery after surgery pathways, and co-management teams all highlight the importance of interdisciplinary collaboration in improving safety, efficiency, and patient experience. This chapter explores future directions in perioperative medicine, highlighting innovations in risk prediction, digital health, and multidisciplinary care pathways. It also provides concluding reflections on the themes of this book, emphasizing that perioperative medicine is not the domain of a single specialty but a shared responsibility. Internists remain indispensable in this effort, for both their broad clinical perspective and their ability to anchor perioperative care in the larger continuum of patient health.