This collection of chapters and articles explores various facets of healthcare delivery to underserved populations in the United States. It examines student-run free clinics as models for providing care and training future health professionals, highlighting specific projects and their impact on communities. The text also investigates community health centers, including faith-based and secular organizations, analyzing provider motivations and the challenges of serving vulnerable groups like the homeless and uninsured. Furthermore, it discusses innovative approaches such as mobile clinics, healthcare navigation programs, and the adaptation of care models to improve access and quality for marginalized communities, including considerations for health disparities and cultural competence.