This issue of Clinics in Geriatric Medicine focuses on the past, present, and future of home health care, a rapidly growing subspecialty of Geriatric Medicine. Guest Edited by Peter Boling, the issue describes the population in need (age range, numbers, projected growth), range of service needs, social vs. medical models of care, international and state-to-state comparisons to show the wide range of strategies that have been tried. It also includes a brief snapshot of the history of home care research, absence of integration of medical model home care and continuity of care for home-bound and function-limited persons in the US.