Financially troubled Steward Health Care has announced plans to sell its physician network to Optum Care, a division of UnitedHealth Group, for an undisclosed sum. Dallas-based Steward has faced ...

Here are 10 numbers that show how big Optum is in healthcare. 1. Optum serves 120 million individual consumers and 80 percent of health plans. 2. OptumInsights serves 90 percent of hospitals in ...