The other shoe drops. Barbakow, already set to lose chairman's seat, out as Tenet's CEO; shareholders, analyst call for outsider as his replacement.

What a difference a year makes. For many, it wasn't a total surprise when Jeffrey Barbakow, the leader of Tenet Healthcare Corp., stepped down last week from the company he headed during a period of glowing prosperity. But as he departs, Tenet is surrounded by a tempest similar to the one that led to his hiring.