Income-related cost sharing in health insurance.

The vast majority of health plans in the United States require patients to meet cost-sharing requirements that are unrelated to income. Because this is highly inequitable, the authors propose a new system in which cost sharing is explicitly linked to income levels. This proposal differs from earlier proposals to relate cost sharing to income, which relied on the federal income tax system. In this plan, employers and insurers (both public and private) would collect the information necessary to relate cost sharing amounts to income. The proposal could be applied to nearly any health system reform proposal currently under discussion. The authors examine the experience of a number of U.S. firms that have already incorporated income-related cost sharing, as possible models to apply to health insurance nationwide.