By Amanda Becker and Carl O'Donnell WASHINGTON/NEW YORK (Reuters) - Health insurers warned that a move by the Trump administration on Saturday to temporarily suspend a program that was set to pay out $10.4 billion to insurers for covering high-risk individuals last year could drive up premium costs and create marketplace uncertainty. The Affordable Care Act's (ACA) "risk adjustment" program is intended to incentivize health insurers to cover individuals with pre-existing and chronic conditions by collecting money from insurers with relatively healthy enrollees to offset the costs of other insurers with sicker ones. President Donald Trump's administration has used its regulatory powers to undermine the ACA on multiple fronts after the Republican-controlled Congress last year failed to repeal and replace the law propelled by Democratic President Barack Obama.



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