ObamaCare is back on the Supreme Court's docket

It's back.

The Supreme Court will hear yet another case involving the Affordable Care Act, it announced Monday. This isn't a challenge to the act itself, but rather a lawsuit from health care providers and health insurers who claim ObamaCare cost them $12 billion in lost payments.

Former President Barack Obama's signature act largely took effect in 2014, but soon after, Republicans had passed a provision requiring it was budget neutral, CNN notes. That provision didn't come until insurers had already set their 2014 rates, meaning they had accounted for a higher federal reimbursement than they would now actually receive. Three small insurers tallied that loss up to $12 billion, and sued the federal government over it.

An appeals court decided against two of the carriers last June, prompting four of them to join together to bring the case to the Supreme Court. Beyond reimbursing that total, a ruling in the insurers' favor could set the agenda for similar pending cases, CNN continues. The U.S. Chamber of Commerce and Attorneys general in mostly blue states have filed briefs in support of the insurers.

This case will be the fifth involving ObamaCare to come up before the Supreme Court, Politico says. Another constitutional challenge to the ACA, led by Republicans, could also head to the Supreme Court soon.