An anonymous reader writes: Silicon Valley might be hunting unicorns in the wrong places. According to one top federal health official, entrepreneurs and investors are overlooking one massive population: Low-income Americans who qualify for Medicaid. That's a big mistake, given that new funds are available for those that are bringing IT innovation to the space, said Medicaid chief medical officer Andrey Ostrovsky. "My gut is that it's a big opportunity with $500 billion in federal spend every year in a system that hasn't evolved technologically much since 1965," Ostrovsky said. "There are unicorns sitting in there," he added.