Health Diagnostic Laboratory faced new troubles after health insurer Aetna sued the clinical laboratory company in Richmond, Virginia. In a lawsuit filed in the U.S. District Court for the Eastern District of Pennsylvania, Aetna seeks to recover "tens of millions in monetary damages and other appropriate relief.” In March, HDL reached a settlement agreement with federal prosecutors over federal fraud charges involving payments to physicians “to process” blood specimens collected in their offices, The Wall Street Journal reported. Cigna also filed a lawsuit against HDL and seeks $84 million in damages. (Photo source: RichmondBizSense.com.)