Here's how 'Obamacare' covered Americans with pre-existing conditions. What happens next? by The Guardian

In all, at least 30 pre-existing conditions would automatically disqualify people from major health insurance plans before the Affordable Care Act, according to another recent study by the Kaiser Family Foundation. Even when applicants had less severe conditions, such as high cholesterol, insurers often sought to limit costs by charging higher premiums, increasing deductibles or modifying benefits.