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Objectives. I examined insurance coverage and medical expenditures of both immigrant and US-born adults to determine the extent to which immigrants contribute to US medical expenditures.

Methods. I used data from the 2003 Medical Expenditure Panel Survey to perform 2-part multivariate analyses of medical expenditures, controlling for health status, insurance coverage, race/ethnicity, and other sociodemographic factors.

Results. Approximately 44% of recent immigrants and 63% of established immigrants were fully insured over the 12-month period analyzed. Immigrants' per-person unadjusted medical expenditures were approximately one half to two thirds as high as expenditures for the US born, even when immigrants were fully insured. Recent immigrants were responsible for only about 1% of public medical expenditures even though they constituted 5% of the population. After controlling for other factors, I …