Which of the following is true regarding Medicare Part D?

Medicare Part D does not cover all prescription drugs; it provides a list of covered medications known as a formulary. Each Part D plan may have different covered drugs, and some medications might not be included, leading to potential out-of-pocket costs for beneficiaries.

While Medicare Part D has made changes to reduce the impact of the coverage gap (also known as the "donut hole"), it still exists. Beneficiaries may face higher out-of-pocket costs for medications after reaching a certain spending threshold until they enter the catastrophic coverage phase.

The deductible for Medicare Part D plans varies by plan and is not universally set at $0. Some plans do have a deductible, while others may not, but it’s not a standard feature across all Part D offerings, making this statement inaccurate.