Ohio's Medicaid agency could have saved more than $300 million if lawmakers and the governor had implemented recommendations made by the state auditor's office two years ago, according to an audit. But John Corlett, director of the state's Medicaid program, said actions his office has taken over the past two years have saved more than $1.7 billion. More than 1.8 million Ohioans, or 16% of the population, are on Medicaid.