In the month, 24 healthcare CEOs left their jobs for a variety of reasons, which kept healthcare CEO departures at the top of the turnover list for the year.
Since the beginning of the year, 507 CEOs have left their jobs, almost identical to the first five months of 2012 when 511 CEO departures were tracked.
Of the 507 departures for 2013, a fifth of them -- 95 -- have been CEOs at healthcare companies.
In May, 104 CEO changes were recorded, outplacement firm Challenger, Gray & Christmas said in a news release.
That is 10.6 percent higher than April and 5.1 percent higher than May 2012, when 99 CEO changes took place.
Government/non-profit companies experienced the second most turnovers in May with 13, followed by financial firms with 10.
For the year to date, healthcare leads all groups with 95 CEO departures. That group is followed by 65 departures from the top office at financial firms and 59 from computer companies.