Life threatening emergencies will still be dealt to by protesting nurses.
A strike gets underway on Thursday, but Ian Powell from the Association of Salaried Medical Specialists says there are plans in place.
- Explainer: The effect of the nurses' strike
- Nurses reassure public ahead of Thursday's strike
- 'We haven't got the money': Winston Peters on nurses' strike
"There will be nurses available via agreement that will be able to come in and help out in the event of potential death or risk [of] permanent harm," he said.
Mr Powell said the striking nurses will certainly be missed though as they make up such a large part of the health workforce.
"It is going to be a challenge we've not had a strike of this magnitude before, nurses make up about 60 percent of the workforce so that’s a big part of the workforce to be away."
This is the first strike action taken by nurses in 30 years.