The Accident Compensation Corporation (ACC) is moving to rein in spending on medical scans, saying the cost has risen 120% in five years.
It says the amount spent on medical scans has blown out to $97 million in the last year.
ACC says as well as the price being too high, it's also been paying for non-injury related scans.
ACC's director of health purchasing, Gail Kettle, says it has been talking with providers about the cost of scans.
She says the talks have been about redetermining what a fair price is.