A new poll by the Wall Street Journal Online/Harris Interactive Survey of adults 65 years of age or older found that 87% of those enrolled in a Medicare Part D plan are satisfied with it.

Of respondents, 75% say their plan has resulted in lower out-of-pocket costs for prescription drugs, and 83% find their plans to be user-friendly. Choice of prescription drugs and the cost of copays and deductibles are among the most important factors seniors consider when deciding on a Medicare drug plan, the survey found. When asked whether they intend to change their Medicare drug plans in 2008, 71% said they are not likely to do so, compared with 19% who responded that they are expecting to change plans.

The online survey of 571 adults 65 and older was conducted from November 29, 2007, to December 3, 2007.