This paper uses data on health spending and health status from the Medical
Expenditure Panel Survey (MEPS) to estimate the differences in health spend
ing across different types of insurance and across incomes that are attribu
table solely to health status differences. The results show that the uninsu
red are less costly than those on Medicaid, based on health status alone, b
ut are more costly than those with employer-sponsored insurance. Adults and
children with private nongroup coverage are also less expensive than avera
ge, because of better-than-average health. Finally, the data show that expe
nditures fall (health status improves) with income, regardless of type of c
overage.