New Zealand's 20 District Health Boards are taking legal action in a bid to stop junior doctors from striking for safer rosters.
Resident doctors are preparing to strike again for 48 hours on November 23, after the latest round of mediation failed this week.
The DHBs will go to the Employment Court next week to seek an urgent injunction to stop the strike, saying they're concerned student doctors will miss their orientation if it goes ahead.
Julie Patterson, the lead chief executive for the 20 DHB's Employment Relations Programme, is also questioning the polling done by the Resident Doctors Association.
"The union conducted only one ballot across all 20 DHBs. The circumstances of the RMOs within each DHB is different and they should have had the opportunity to conduct their own vote in relation to the strike action," Ms Patterson said.
"Otherwise, there is a risk that the tail could wag the dog."