This study provided a national profile of health insurance of certain vulne
rable populations including children, racial/ethnic minorities, low-income
families, non-metropolitan statistical area (MSA) residents, and those with
poor health status. The study shows an increase in the proportion of unins
ured nonelderly population. While public insurance helped reduce the employ
ment- and health-related disparities in private coverage, it has not overco
me other disparities related to vulnerable characteristics including race/e
thnicity, wages, education, and area of residence. Comparison between healt
h maintenance organization (HMO) and fee-for-service insurance indicates th
at younger although not much healthier people, racial/ethnic minorities, MS
A residents, and those residing in the West and Northeast regions were more
likely to have HMO coverage. To reduce significant disparities in health i
nsurance coverage, policy makers will have to consider expanding public ins
urance coverage, targeting vulnerable groups, partiallarly those with multi
ple vulnerable characteristics rather than merely the economically distress
ed. Expecting managed care to achieve cost containment for services provide
d to vulnerable populations may be unrealistic.