Limited Knowledge of Cost-Sharing Requirements of Medicare Part D May Effect Drug Adherence (Senior Journal)
Enrollees in the large Medicare Advantage Part D drug plan have a limited knowledge of the plan s cost-sharing requirements, and more than one-third report cost-coping behaviors such as reducing drug adherence or switching to a cheaper drug, according to the second study in JAMA.

Still lack of knowledge regarding Medicare's Part D prescription drug program (News-Medical-Net)
There still appears to be some lack of knowledge regarding Medicare's Part D prescription drug program, although there is evidence that cost-related medication nonadherence may have improved overall, according to two studies in the April 23/30 issue of JAMA, the Journal of the American Medical Association.

Medicare Part D beneficiaries may pay a price for poor knowledge of their Part D benefits (EurekAlert!)
April 22, 2008 (Oakland, Calif.) Medicare Beneficiaries have limited knowledge of their Medicare Part D outpatient prescription drug benefits.