HealthCare.gov: "As a result of the Affordable Care Act, families will soon be free from the constant worry that they will not be able to get health care when they need it the most. But repealing the law would strip Americans of this new freedom and take us back to the days when big insurance companies had the power to decide what care residents of the United States could receive—allowing them to once again deny coverage to children with pre-existing conditions, cancel coverage when people get sick, and place limits on the amount of care people can get, even if they need it. What’s more, without the law, insurance companies could overcharge for insurance just to boost their profits, or use fine print to deny medical treatments that are covered under people’s policies.
"In addition, repealing the law would add at least a trillion dollars to the deficit ...
* Over 1.2 million young adults would lose their insurance coverage through their parents’ health plans, sometimes just after they finish school and as they are looking for a job. Families across the United States would lose the peace of mind the Affordable Care Act provides by making sure that young adults can stay on their parents plan to age 26 if they do not have coverage of their own.
* Over 165 million residents of the United States with private insurance coverage would suddenly find themselves vulnerable again to having lifetime limits placed on how much insurance companies will spend on their health care.
* Insurance companies would once again be allowed cut off someone’s coverage unexpectedly when they are in an accident or become sick because of a simple mistake on an application. This would leave 15.9 million people in the United States at risk of losing their insurance at the moment they need it most, as one of the worst abuses of the insurance industry would become legal again.
* Over 165 million residents of the United States would not know if they are receiving value for their health insurance premium dollars, as insurers in state would no longer be required to spend at least 80 to 85 percent of premium dollars on health care rather than CEO salaries, bonuses, and corporate profits.
* New insurance plans would no longer be required to cover recommended preventive services, like mammograms and flu shots, without cost sharing, nor would they have to guarantee enrollees the right to choose any available primary care provider in the network or see an OB-GYN without a referral.
* 44.1 million seniors in the United States who have Medicare coverage would be forced to pay a co-pay to receive important preventive services, like mammograms and colonoscopies.
* Medicare would no longer pay for an annual check-up visit, so 44.1 million seniors in the United States who have Medicare coverage would have to pay extra if they want to stay healthy by getting check-ups regularly." [partial list]