James Parker has been named chief executive officer of MDwise, an Indianapolis Medicaid insurance company that is 50 percent owned by Indiana University Health. He had been serving as interim CEO of MDwise and president of IU Health Plans. Mark Lantzy, senior vice president and chief information officer of IU Health, has taken on the additional responsibility of president of IU Health Plans. Lantzy joined IU Health one year ago after serving as chief operations officer and CIO at a Pennsylvania health insurance company.