Artificial intelligence has become a big part of medicine — reading images, formulating treatment plans and developing drugs. But a recent investigation by Stat News found that some insurers overrely on an algorithm to make coverage decisions for seniors on Medicare Advantage, a Medicare plan offered by private insurers. Marketplace’s Meghan McCarty Carino spoke with Casey Ross, who co-reported the story. He said an algorithm predicted how long patients needed care and coverage was curtailed to fit that calculation.