There is a movement in healthcare towards preventative care. This shift involves using technology to assist in care provision outside traditional care institutions -- for instance, in a patient's home. To support such an environment, care providers require notification of incidents as they occur. However, health information is sensitive, thus the circumstances for disclosure must be controlled. This paper provides an overview of our work on event-based data dissemination control in healthcare. We describe the nature of data-driven healthcare, and how care providers meet their data management responsibilities through fine-grained, context-aware policy rules that control the information they release.