Massachusetts General Hospital president Peter Slavin stepping down after 18 years Updated 10:03 AM; Massachusetts General Hospital president Peter Slavin announced he will be stepping down and that it is time to “call upon a new captain for the ship.” “This is one of the hardest decisions I have ever made,” he wrote in an email obtained by MassLive. “After months of both reflecting and looking ahead, I have concluded there will never be a right time to leave.” Slavin became president of Massachusetts General Hospital in 2003. The email stated he will remain president until his r...