This document discusses patient access to medical records and the effects of increased access. It finds that there is a lack of clear evidence on how increased access affects outcomes and that there are competing rationales for and against greater access. The document also examines how healthcare is being impacted by the information revolution, including how it may change relationships between patients and providers and impact quality of care, professional responsibilities, privacy, health inequalities, and the roles of alternative providers and the private sector. Overcoming barriers will require interventions to realize the potential benefits of increased access to medical records.