The National Survey of Medical Decision Making is be conducted by investigators from the Survey Research Center and the Center for Behavioral and Decision Sciences in Medicine at the University of Michigan. The purpose of the project is to understand how medical decisions are made. Specifically, to describe the extent to which patients who have made decisions had basic information about their options and the implications of those options. Additionally, to understand how patients’ perceive the decision making process. The survey will include a probability sample of 3000 adults, age 40 or older, selected based on random digit dialing who have recently made medical decisions.