The vast majority of single-payer health care plans in a new study would save the country money on health care costs.

Democratic-led states are asking the Supreme Court for a fast-track review of a recent appeals court decision that declared a key part of the Obama-era health law unconstitutional and cast a legal cloud over the rest of it

As a candidate for the White House, Donald Trump repeatedly promised that he would “immediately” replace President Barack Obama’s health care law with a plan of his own that would provide “insurance for everybody

A federal appeals court ruled the Affordable Care Act's individual mandate unconstitutional.

The decision, by a two-to-one vote on the Fifth Circuit U.S. Court of Appeals, means prolonged uncertainty for the nation’s health care system and the millions of Americans who rely on the law.

A divided federal appeals court on Wednesday threw a lifeline to the ACA, asking a lower court judge to reconsider his decision invalidating the entire law.

A federal appeals court has struck down “Obamacare’s” now-toothless requirement that Americans carry health insurance

The latest case has largely flown under consumers’ radar.

Medicare’s revamped online drug plan finder could prove confusing and costly for consumers

The Trump administration announced a policy that would require hospitals to disclose negotiated rates with insurance companies.

A more generous plan with a deductible can be an attractive recruitment tool.

More choices and stable premiums for 'Obamacare' next year, but court case looms over the program

Among the new measures are those that authorize importing prescription drugs.

Eighteen states are fighting against Obamacare, potentially affecting millions of Americans.

A federal appeals court on Tuesday will consider the fate of the Affordable Care Act, setting the stage for a major decision that could affect health care of millions.

Backed by the Trump administration, a group of 18 Republican-led states are heading to court to invalidate Obamacare, putting millions of Americans at risk.

A federal appeals court on Tuesday will consider the fate of the Affordable Care Act, setting the stage for a major decision that could affect health care of millions.

As part of "This Week's" Critical Care series, ABC's Steve Osunsami traveled to Tennessee to report on the impact hospital closures have had on rural communities.

The administration wants to ease certain regulations affecting this group.

ABC News Correspondent David Wright examined Medicare for all in the first installment of "Critical Care" on "This Week" Sunday.

Senate Republicans "anxious" to hear about President Trump's new health care plan.

The Gaffers thought they were paying their health insurance. They were wrong.

New research suggests that states that expanded Medicaid coverage under the Affordable Care Act eliminated racial differences in being able to quickly start on treatment after a diagnosis of advanced cancer

Washington set to offer a universally available public health insurance option.

Nurses from across the country are in the nation's capital in support of a Medicare-for-all plan. ABC News' MaryAlice Parks reports.

Attorney General Bill Barr on Tuesday seemed to express skepticism that the Trump administration's latest position can withstand legal scrutiny in the Supreme Court.

While President Trump promises his administration is putting together a "great health care plan," two senior White House officials say no legislation is being crafted.

The president said on Twitter that he never planned on voting on a health care plan until after the next presidential election.

Democrats slam GOP for not having a plan to replace the Affordable Care Act.

The cost of healthcare is leading people to either borrow large amounts of money to pay for treatments or regularly skipping treatments or forgoing prescriptions.

Mick Mulvaney claims he can guarantee every person who has health coverage because of "Obamacare" will not lose their coverage if the ACA is struck down in court.

Trump's battle with "Obamacare" moves to the courts with big risks and unpredictable results

Republicans in Congress and President Trump don't seem to have a plan in case there is a lapse in coverage if the Affordable Care Act is repealed.

Congressional Democrats are blasting the administration on its health care stance, while some Republicans are even expressing reservations about the shift in policy.

Members of Congress respond to the Trump administration's request that the court strike down the Affordable Care Act.

Democrats are quick to point out Republicans don't have a new plan to replace the Affordable Care Act, but President Donald Trump is welcoming the battle ahead of the 2020 election.

The Department of Justice agreed with a lower court and said the health care law should be repealed.

The U.S. Department of Justice said it supports a federal judge's ruling that the entire Affordable Care Act should be overturned.

The U.S. Department of Justice now says it supports a federal judge's ruling that the entire Affordable Care Act should be overturned.

Economist Jonathan Gruber says the act known as Obamacare is, "part of the fabric of the American health care system right now."

The Department of Justice says the court should completely invalidate the Obama health care law.

Alma Bocaletti, a student enrolled in a state-run health care program, discusses the Trump administration's request to repeal the health care law.

The U.S. Department of Justice now says it supports a federal judge's ruling that the entire Affordable Care Act should be overturned.

In states including Texas, Arizona and Louisiana, a series of events have been held to harness energy on the ground and to showcase enthusiasm.

Kaiser Health News looks back on high drama moments over health care.

Kaiser Health News looks back on high drama moments over health care on Capitol Hill.

The administration's plan could cause far-reaching change.

New Democratic governors and Democratically controlled legislatures take action.

The Utah politician is leaving the Senate after 42 years.

Federal judge who declared health law unconstitutional stays his ruling.