Transition to Medicare Part D affected not only 35.4 million elderly enrollees but also 6.4 million younger enrollees with disabilities, 2.5 million of whom have low incomes and previously obtained medications through Medicaid. Because Part D was conceived primarily as a benefit for elders, we sought to examine its effects on a dually eligible, younger group of beneficiaries who have significantly different, more expensive, and often unstable health conditions
