Timely and accurate estimates of the number of people who do not have health insurance coverage are important for understanding trends in health insurance coverage and the impacts of policy changes that affect health insurance. Estimates of the number of people who are uninsured are available from several different sources. This brief provides an annual update to comparisons of uninsurance estimates from five federal surveys.[i] It presents trends in national estimates of uninsurance, presents the most recent available state-level estimates from these surveys, and describes the main reasons for variation in the estimates across the different surveys.

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