Geoffrey F. Joyce, PhD

This study examined the impact of the Medicare Part D coverage gap on medication use by Hispanics, blacks, and whites with diabetes.

Physicians prescribe more broadly than commonly perceived. Although most physicians have a favorite drug, they are not reluctant to try new therapies.

Coverage under Part D is comparable to that under non–Part D plans with respect to key features likely to be important to Medicare beneficiaries.

Biologic therapy for rheumatoid arthritis or multiple sclerosis was associated with lower use of some types of medical services within 2 to 3 years of initiation.