Nine in 10 Massachusetts seniors would have paid higher health insurance premiums in 2010 under a reformed Medicare structure similar to what Mitt Romney and Paul Ryan have proposed, according to a study published on Monday by the Kaiser Family Foundation. Nationwide, 59 percent of Medicare enrollees would have faced higher out-of-pocket costs. The analysis was based on actual health plan bids and Medicare costs in 2010, the most recent year for which complete data were available.
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