No ROI in ACO. Risk, expense of Medicare program has most for-profit groups shying away.

For-profit healthcare companies aren't beating down the door to get in on Medicare ACOs. Several of the big chains say there is too much uncertainty about the experiment, and they're waiting to see how the program evolves. One company on the sideline is Capella Healthcare. Chairman and CEO Daniel Slipkovich, left, says there is a potential for high patient dropout rates and risks in population management.