The ambulance was called to the ICC building in the afternoon after what a council spokeswoman described as a medical event.
"We understand that Cr Biddle is OK, and was last night receiving medical care," the spokeswoman said.
"Council has no further comment to make, and ask that Cr Biddle’s privacy is respected."
Cr Darren Ludlow took over as chairman of the Southland Museum and Art Gallery meeting Cr Biddle was expected to chair in the afternoon.
He confirmed yesterday morning that members of the gallery trust board were not told at the meeting on Thursday why Cr Biddle was absent from the meeting.
Cr Biddle was first elected to the council in 2016, receiving the third-most votes, and was re-elected again last year.
She took control of emergency meetings for the Invercargill City Council during the Covid-19 lockdown.
