Abstract: This paper traces the emergence of categories of nurse over the last hundred years from the time that the Nurses Registration Act became law in 1901. Insights from the work of Michel Foucault are utilised to show how nurses and nursing have been historically shaped and positioned. It is suggested that the recent endorsement by the Nursing Council of New Zealand of the concept and title of 'nurse practitioner' represents an opportunity for nurses to imagine what might be constructed for their roles.