 Conceptualizing and measuring access to care is more complex a task than it might seem at first. In part, this is because health care is non-homogeneous in its function, for it does quite different things for us. In addition, there is disagreement about the nature of health care as a social good: some think it is just a commodity, to be purchased in a market like other commodities; others claim it has a special moral importance that distinguishes it from some other market goods. If we are to make sense out of claims that we owe each other equal or at least equitable access to care, and this means we must overcome various barriers to access to care that create inequitable access, then we need to be clear how to determine when access is unequal or unjustifiably unequal.