Labour MP Annette King says she hasn't decided what she'll do for the next general election.
Ms King is the MP for Rongotai, deputy leader of Labour and their spokeswoman for health.
There's been speculation the 68-year-old may not stand at the 2017 general election or will run on the party list, creating an opportunity for a new electorate MP.
"That's a decision I've yet to make," Ms King told TVNZ's Q&A program today.
"I'm not ruling anything out," she said.
She says she'll make a decision in due course.
Last month Labour leader Andrew Little said he was keeping Ms King as his deputy through to the next election.
He chose the veteran MP for the position when he became leader nearly a year ago, saying he would decide in 12 months whether to keep her on or make a change.
His announcement ended speculation Jacinda Ardern might replace Ms King.