Effect of Medicare Part D and insurance type on Medicare beneficiary access to prescription medication and use of prescription cost-saving measures.

OBJECTIVES: To examine how prescription drug access and use of prescription cost-saving measures changed after Medicare Part D was implemented and to determine their predictors in Medicare beneficiaries with different insurance types.
DESIGN: Repeated cross-sectional study.
SETTING: United States in 2005 and 2007. PATIENTS: Medicare beneficiaries aged 65 years or older (n = 1,220 in 2005 and n = 1,024 in 2007). INTERVENTION: Web-based surveys using nonprobability samples. MAIN OUTCOME MEASURES: Access to prescription drugs and use of seven costsaving measures.
RESULTS: Significantly fewer participants stopped taking a prescription because of cost, applied to an assistance program, received free prescription samples, and had limited prescription access in 2007 compared with 2005. Use of cost-saving measures by Medicare Part D patients was more comparable with that by uninsured participants than patients with employer-based drug coverage. One-third of all participants and almost one-half of Medicare Part D participants had requested a less expensive prescription. Among those participants, 70% received a less expensive prescription and most thought it worked about the same as the more expensive prescription.
CONCLUSION: Prescription drug access and use of cost-saving measures improved somewhat following the implementation of Medicare Part D, but some access problems continued to exist for Part D participants. Requests for less expensive prescriptions were common and frequently resulted in satisfactory switches.