Hell no, we won't ACO. Providers, once eager to sign up for new program, say proposed rule on accountable care is a deal-breaker.

Hospital executives were eager to sign up for Medicare's proposed ACO program--until they saw the proposed rule spelling out how the CMS wants to structure it. They see too many risks, with too little chance of rewards. Stephen Mansfield, left, of Methodist Health System, describes the rule as "cold water" on the industry's interest and says he fears a promising opportunity will be sidelined. "I am so disappointed," Mansfield says.