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Following the introduction of a question on health insurance coverage in 2008, the American Community Survey (ACS) has increasingly been used as a source for state-level health insurance estimates. This reflects a number of key advantages of the ACS, including a survey design that supports state representative estimates for all states and the large size of its sample. As a result, the ACS yields relatively precise state-level estimates of annual health insurance coverage. This paper explores the feasibility of expanding the value of the ACS for tracking health insurance coverage by generating subannual estimates.