About 13 percent of Medicare beneficiaries receive some assistance fro
m Medicaid. States ''buy in'' Medicare coverage for these low-income b
eneficiaries. For those eligible, states also provide benefits beyond
those covered by Medicare. Buy-in beneficiaries are different from oth
er Medicare beneficiaries in many ways. They have lower incomes, which
is consistent with the policy intent. They use more health services i
n general but do not appear to receive timely, appropriate care relati
ve to several disease-specific standards. As policymakers consider res
tructuring Medicare and Medicaid, careful attention needs to be paid t
o the effects of changes on these beneficiaries.