In the weeks since the Supreme Court issued its decision on the Affordable Care Act, some health law experts have taken a longer look at the implications. And they are concerned about just how far-reaching the decision could be.

The complicated, multipart decision upheld most of the law, including a requirement that most Americans have health insurance or pay a penalty. But it also said the federal government could not require states to expand Medicaid to cover more of the poor, or risk losing all federal funding for the health program.