WASHINGTON — President Barack Obama’s health care law is snarled in another big legal battle, with two federal appeals courts issuing contradictory rulings on a key financing issue within hours of each other Tuesday.

But the split rulings don’t necessarily mean another trip to the Supreme Court for the Affordable Care Act.

And White House spokesman Josh Earnest immediately announced that millions of consumers will keep getting financial aid for their premiums — billions of dollars in all — as the administration appeals the one adverse decision.

In that first ruling, a divided three-judge panel in Washington called into question the subsidies that help millions of low- and middle-income people afford their premiums, saying financial aid can be provided only in states that have set up their own insurance markets, or exchanges.

About 100 miles to the south in Richmond, Va., another appeals court panel unanimously came to the opposite conclusion, ruling that the Internal Revenue Service correctly interpreted the will of Congress when it issued regulations allowing health insurance tax credits for consumers in all 50 states.