Today's competitive health care markets demand innovation and risk taking on the part of organizations. However, increased government regulation and stiffer penalties enacted in the wake of recent high-profile corporate scandals and the resulting Sarbanes-Oxley legislation, may render boards less willing to undertake entrepreneurial ventures. This article extends the typology of corporate entrepreneurship (CE) developed by Covin and Miles (1999) by extending the CE types to address governance activities in the health care sector. Four case studies are presented that illustrate each of the typology's forms. In addition, the implications of the typology for health care executives and trustees are discussed and areas for future research are recommended. © 2007 Elsevier Ltd. All rights reserved.