Accident Compensation Corporation (ACC) has paid nearly $675 million for patients injured after botched medical treatments, misdiagnosis, post-surgery infections and reactions to medications in the past decade.
Photo: ACC
New figures show the number of treatment-injury claims ACC accepted has increased by 170 percent to 8832 acceptances in 2015-16.
Costs have also increased by 490 percent in the past decade to $123 million.
People returning from overseas with injuries caused by medical treatment have cost $1.2 million in public money in the same period.