Health and Medical Care Archive (HMCA)HMCA is a data archive hosted by the Inter-university Consortium for Political and Social Research.
"The data collections in HMCA primarily includes large-scale surveys of the American public about public health, attitudes towards health reform, and access to medical care; surveys of health care professionals and organizations, public health professionals, and nurses; evaluations of innovative programs for the delivery of health care, and many other topics and populations of interest" (from the website).