Kevin Brown, who has been CEO of Swedish Medical Center for just over a year, is leaving to lead Piedmont Healthcare, a five-hospital, not-for-profit system based in Atlanta. Swedish has named Marcel Loh, who currently oversees Swedish's suburban hospitals and community hospital affiliations, as interim chief executive. His new position took effect Monday. Brown, 46, has been with Swedish since 2000. He took over as CEO when Dr. Rod Hochman moved over to the larger Providence Health & Services system, which affiliated with Swedish in early 2012. Hochman took over as the Providence CEO on Monday.