An underlying and fundamental aim of New Public Management (NPM) reform program is to transform the organizational identity of public organizations into a business like identity. In this paper the construction of organizational identity as an effect of NPM initiatives is analyzed from a sensemaking perspective. The study draws on data from a two and a half year study of the introduction of NPM at the public health care authority in the region of Värmland in Sweden. It is concluded that NPM creates heterogeneous, conflicting and fluid organizational identities rather than the uniform and stable business identity it is supposed to. Keywords: New Public Management, Sensemaking, Organizational identity, Reform, Health care administration.