Depression in older home healthcare patients occurs very often, is typically not treated appropriately, and leads to poor health outcomes. This study tests an intervention, called "Depression Care for Patients at Home" or the Depression CAREPATH, designed to help home healthcare nurses work with the patients, their family, and their doctors in managing depression treat depression according to clinical guidelines and to manage its treatment over time. Patient outcomes, measured at 3, 6, and 12 months, include guideline-consistent changes in depression treatment and reduction in depressive symptoms.