Normal pressure hydrocephalus (NPH) is a reversible disorder characterized by gait impairment, subcortical dementia, and urinary urgency and incontinence associated with impaired cerebrospinal fluid circulation and ventriculomegaly. Treatment with shunt surgery is most likely to increase mobility, and may also improve dementia and urinary symptoms. An international, independent study group recently published guidelines for the diagnosis and management of idiopathic NPH. This article helps geriatricians identify patients who might have NPH, and care for these patients after shunt placement.