This study provides consistent evidence, from three very diverse states with heterogeneous populations and distinct programs (Florida, Kansas, and New York), that the State Children's Health Insurance Program (SCHIP) increased access to and satisfaction with health care among enrolled low-income children and that vulnerable children-minorities, children and adolescents with special health care needs, and children who were uninsured for long periods of time-shared in these improvements. We highlight some areas to target for future improvement, such as reducing the high levels of unmet needs among special-needs children and increasing preventive care, especially for Hispanic children.