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Seniors Face Higher Drug Costs As Coinsurance Becomes More Common

Medicare beneficiaries may get dinged with higher prescription drug bills this year because more than half of covered drugs in standalone plans require them to pay a percentage of the cost rather than a flat fee, an analysis from consulting group Avalere Health says.

Fifty-eight percent of covered drugs in Part D drug plans in 2016 are subject to this so-called coinsurance, the Avalere analysis found. That means patients are on the hook for a percentage of the costs, which can be much higher than a traditional copay, which is flat. If a drug costs $200, instead of making a $20 copayment, they may owe 20 percent of the cost, or $40.

The percentage of drugs requiring coinsurance has climbed steadily, increasing from 35 percent in 2014 to 45 percent last year. That percentage is approaching two-thirds of all covered drugs.

More coinsurance makes beneficiaries' drug costs less predictable, said Caroline Pearson, a senior vice president at Avalere. It may also result in fewer affordable options if patients can't achieve any savings by substituting drugs in the same therapeutic class, she said. The shift toward coinsurance also means that Medicare beneficiaries will have to rely to a greater extent on cost-estimating tools like the Medicare plan finder to figure out how much they may owe out of pocket.

Medicare Part D plans typically divide drugs into five tiers with different levels of cost sharing. In the past, coinsurance may have been limited to high-cost specialty drugs, but that's changing. Last year, about two-thirds of people in drug plans faced coinsurance in more than one drug tier; this year the figure is 96 percent, according to Avalere.

Medicare Advantage managed care plans aren't shifting to coinsurance to the same degree as the standalone drugs plans that accompany traditional Medicare coverage, the analysis found. In 2016, 26 percent of covered drugs in Medicare Advantage plans required coinsurance.

"On the Medicare Advantage side, the premium includes both medical and drug benefits, and the drug piece is smaller," so the incentive to tightly manage drug costs may be lower in Medicare Advantage plans, Pearson said.

Please contact Kaiser Health News to send comments or ideas for future topics for the Insuring Your Health column.

Copyright 2016 Kaiser Health News. To see more, visit Kaiser Health News.

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