"A small number of providers are driving up the cost of care for the people and customers we serve," she said. "This is particularly evident with private equity-backed physician staffing companies like TeamHealth." United Healthcare provided NBC News with examples of TeamHealth costs far exceeding median charges for specific emergency department procedures. A patient visiting an emergency department with chest pains, for example, would face a median charge of $340, United Healthcare said, versus a TeamHealth bill for $976. Stitches on a minor cut would be $200 at the median rate, compared with $888 from TeamHealth. And the median rate for a broken arm is $665, while TeamHealth's charge is $2,947. Lee of TeamHealth declined to comment on the figures."