It is esti­mat­ed by CMS (which runs Medicare and Med­iCal) that near­ly half a mil­lion peo­ple could lose sub­si­dies or health insur­ance cov­er­age they obtained through the ACA. Of this round num­ber, 363,000 could lose the sub­sidy due to an inabil­i­ty to ver­i­fy qual­i­fy­ing income and 115,000 could have their poli­cies can­celled because they could not prove immi­gra­tion status