The future of the Affordable Care Act could depend on the success of federal and state administrators in signing people up in the current open enrollment period—the last one before the 2016 election. Over 10 million people eligible for ACA coverage have yet to sign up. Retention of those already covered may be hindered by rising premiums, dissatisfaction with high deductibles or coinsurance in some plans, limited choices of providers offered by plans, or simple ignorance of the necessity to re-enroll.