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On average, Part D premiums are rising by $1 in 2015, to $32 per month. But that average is for all plans. Some of the most popular plans are boosting premiums by more than that, s ays Ross Blair, senior vice-president of eHealthMedicare.com, which includes tools to help people compare policies.
The Medicare Part D monthly premium varies by plan. In addition, a Medicare plan providing prescription drug coverage may change its premium each year based on inflation and estimated cost increases. The Centers for Medicare & Medicaid Services (CMS) set the base premium for a Medicare Part D prescription drug plan in 2017 at $35.63 per month.