Big U.S. insurers are courting one another for possible multibillion-dollar deals. How they pair off could have significant implications for the managed-care industry, its individual and corporate customers, and U.S. medical providers.

Coinsurance? Premium tax credit? HMO and PPO?

Swimming through the health insurance word soup can be frustrating for anyone. Even though I cover health, I couldn’t define “cost-sharing reduction plan” until I Googled it just now.

And it seems I’m not the only clueless 20-something here. Young adults, who generally have little experience managing their own health care expenses, are finding it especially hard signing up for insurance under the Affordable Care Act, according to a study published Tuesday in the Journal of Adolescent Health.

Republicans who have been hoping that the Supreme Court will upend President Obama’s health care law are now confronting an urgent and uncomfortable question: What if they win?

Republicans in Congress would face an enormously complicated challenge to fashion an alternative, and they fear the fallout could lead to election losses if millions of Americans abruptly found themselves without health insurance.

If the court voids a federal rule allowing subsidies in states that use the federal insurance marketplace, many Republicans said, they would support a temporary continuation of subsidies for people with low or moderate incomes.

Later this month, the Supreme Court is expected to hand down its ruling in the case of King v. Burwell, a challenge to the Affordable Care Act (ACA) with potentially major consequences for millions of Americans who have received health insurance under the law’s coverage expansion provisions.