The Huffington Post reported the decision Monday.
House Republicans filed their lawsuit in 2014 as the latest in a string of conservative legal challenges to the Affordable Care Act (ACA). The House GOP argued that President Barack Obama's health care law violated the Constitution because it appropriated the subsidies without Congress' approval. Under the Affordable Care Act, the government helps offset the cost insurers incur when they cover low-income Americans.
A federal district judge ruled in favor of the House Republicans, and the case was on appeal to the U.S. Court of Appeals for the DC Circuit. The lawsuit would have affected 7 million individuals, the Huffington Post reported. Experts argued that if the lawsuit were successful, it could throw the individual insurance marketplace into a tailspin as insurers may have pulled out.