La Rosa Carrington has more than enough to worry about. She’s a single mother with two teenage daughters, she’s fighting a type of leukemia that requires five days of chemo a month for four months, and she lost her job in May. So the last thing she needed was news that her health insurance benefits would be terminated because she hadn’t paid her premium in full. The shortfall? One penny. “My medical bills are coming in like locusts, and you’re holding up my benefits because of one red cent?” an incredulous Carrington said from her hospital bed last week as she recalled her conversation with a customer service rep at Discovery Benefits, an employee benefits administrator based in North Dakota.