House Ways & Means Republicans asked CMS acting program integrity director Jonathan Morse what additional tools the agency might need to help bring down improper payment rates in Medicare -- 11 percent for Medicare fee-for-service and about 10 percent for Medicare Advantage in fiscal 2016, according to the government's payment accuracy website -- but Morse did not ask for any additional authority, even though a representative from the Government Accountability Office suggested lawmakers could give CMS the authority to let...