A July ruling that threatened to undermine President Barack Obama's landmark healthcare reform law will be revisited by a US appeals court.
The US Court of Appeals for the District of Columbia announced that the full court will review a decision by a panel of three of its judges which several weeks ago disallowed federal subsidies in most US states under Obama's signature Affordable Care Act law.
By a vote of two to one, the appeals court panel said in July that the wording of the law authorizes federal subsidies for only state-run health care "exchanges" -- insurance marketplaces where Americans can shop for health care coverage.
At present, most health care exchanges are run by federal officials and just 14 are operated by states.
The court decision, if upheld, could void subsidies for millions of low-income and middle-income Americans, making their health care coverage prohibitively expensive.
The appeals court scheduled a December 17 date to re-hear the case.
The decision to reconsider came amid unrelated revelations that the federal program's healthcare.gov website had been hacked.
News of the breach was released by the Department of Health and Human Services, which said hackers uploaded malicious software to the site, revealhear reports.
HHS, which told US media that no consumer information appears to have been stolen, said additional measures have been taken to shore up security in the wake of the attack.