“Medicare Part D has helped to make prescription drugs more affordable for people with Medicare, yet many beneficiaries continue to face high out-of-pocket costs for their medications. Specialty tier drugs—defined by Medicare as drugs that cost more than $670 per month in 2019—are a particular concern for Part D enrollees in this context. Part D plans are allowed to charge between 25 percent and 33 percent coinsurance for specialty tier drugs before enrollees reach the coverage gap, where they pay 25 percent for all brands, followed by 5 percent coinsurance when total out-of-pocket spending exceeds an annual threshold ($5,100 in 2019). While specialty tier drugs are taken by a relatively small share of enrollees, spending on these drugs has increased over time and now accounts for over 20 percent of total Part D spending, up from about 6 to 7 percent before 2010.”
“Figure 1: Medicare Part D beneficiaries can pay thousands of dollars out of pocket for specialty tier drugs, with the majority of costs for many drugs above the catastrophic threshold.”
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