Of those who left Covered California plans in 2016, 84 percent transition to another type of insurance, such as employer-based coverage or Medicare, leaving 16 percent uninsured. That’s compared with the federal exchange, where 48 percent of people who leave move on to other types of coverage and 51 percent end up uninsured. Covered California reports that 40 percent of its enrollees leave the state’s insurance marketplace each year.