Nashville, Tenn.-based HCA Healthcare posted $15.86 billion in net operating revenue in the second quarter, with managed care accounting for almost 50 percent of revenue, according to an earnings report published July 31.Payer mix by net patient service revenues for the quarter ended June 30:Commercial: $7.8 billion (49.4 percent)Medicare: $2.6 billion (16.2 percent) Managed Medicare: […]