HealthSouth's financial meltdown has exposed one of the dangers of partnering with a national healthcare management company: commingling, which is when the corporate partner mixes cash from individual surgery centers in national accounts that may be subject to the claims of the partner's creditors. Just as joint ventures can provide you with experienced management and access to purchasing contracts and capital, they can also spell trouble. Here are six steps you can to take to steer clear of the risks.