The Supreme Court decision upholding the Affordable Care Act is good for expanding health care access in the U.S., a University of Arizona physician and public health specialist says.

Joe Gerald, a professor in the UA College of Public Health, says the law is a major step toward providing access to health care for many more Americans who now can't afford it.

"I think it really does represent a step forward," Gerald says. "We've made progress with the Supreme Court upholding this piece of legislation. It's not perfect, but I think that it's good enough to move us ahead."

To get it closer to perfect, the law must be amended to address two other issues, he says.

"We have two other large problems in the United States with regard to health care. One of those is how much it costs, and the other is how safe it is," he says. "The ACA really doesn't address either of those problems very well."