The Centers for Disease Control and Prevention (CDC) provide screening services for breast and cervical cancer to low-income, uninsured, and underserved women through the National Breast and Cervical Cancer Early Detection Program (NBCCEDP). They are interested in calculating participation rates for states and counties by demographic subgroups. The U.S. Census Bureau’s Small Area Health Insurance Estimates (SAHIE) program is engaged in research regarding the feasibility of producing the denominators for these rates. In this paper we discuss the estimation of uninsured rates for low-income women by age, race and whether they are Hispanic. For a general discussion of the problem, see U.S. Census Bureau (2006), hereafter referred to as “the report”.