Purpose: This longitudinal study examined the role of health insurance in access to health care among older immigrants. Design and Methods: Using data from the Second Longitudinal Study of Aging, the longitudinal trajectories of having a usual source of care were compared between 3 groups (all 70+ years): (a) late-life immigrants with less than 15 years of residence in the United States ("recent immigrants"; n = 133), (b) "earlier immigrants" (15 years or longer in the United States, n = 672), and (c) U.S. born (n = 8,642). A series of hierarchical generalized linear models were run to test the mediating relationship of health insurance between immigrant status and having a usual source of care. Results: Although the probabilities of having a usual source of care increased over time across all three groups, recent immigrants were less likely to have Medicare and private insurance over time; this in turn was related to lower probabilities of having a usual source of care (indirect relationship). There was no direct relationship between immigrant status and having a usual source of care. Implications: To prevent the use of more expensive forms of care in the long run, policy efforts should expand late-life immigrants' health insurance coverage by increasing affordable health insurance options.