A theoretical model of clinical case management for psychogeriatric patients and their families is described. Psychogeriatric patients often have complex health care needs, requiring specific nursing interventions. The increasing frailty of these patients over time, together with the risk for institutionalization, make professional nursing contribution to their care even more desirable. Nursing case management is described by means of a conceptual-operational continuum. On the conceptual site, the continuum includes a geriatric definition and core principles of case management. On the operational site, case management is described as a clinical system, a process, a technology, and a role. The process of case management is a deliberate, intellectual activity whereby the practice of nursing is approached in an orderly, systematic manner. It includes components of assessment, diagnosis, planning, implementation, and evaluation. The case management approach requires nurses to assume an active role in designing care maps and to work collaboratively with members of a multidisciplinary team.