Three million seniors could lose their Medicare Advantage coverage, while millions more would face benefit cuts and higher out-of-pocket health care costs under legislation passed today by the U.S. House of Representatives.Noting that 49 percent of Medicare Advantage beneficiaries have incomes of less than $20,000 per year, Karen Ignagni, President and CEO of America's Health Insurance Plans (AHIP), said the legislation would have a devastating impact on seniors' health security."The House bill shreds the safety net for millions of seniors who depend on Medicare Advantage," said Ignagni. In testimony before the Ways and Means Committee last week, Peter Orszag, Director of the non-partisan Congressional Budget Office, said that Medicare Advantage enrollment would fall by 33 percent under the legislation passed today by the House.