Sir Paul Holmes' family are gathering in Hawke's Bay after he was taken to Hawke's Bay Hospital, according to a statement from his family.
Sir Paul is said to be in a stable condition.
"The family have gathered in Hawkes Bay to be close to Paul, however, request privacy at this time and will be making no comment to the media," a statement from his wife Lady Deborah Holmes and his brother Ken said.
Named in the New Year's Honours List for his "legacy" in broadcasting and the community, Sir Paul was supported by his family and 100 invited guests a week ago at his Mana Lodge estate for his investiture.
The investiture ceremony was moved forward to accommodate the 62-year-old's ailing health. He underwent heart surgery last year and is battling an aggressive prostate cancer he was first diagnosed nearly 10 years ago.
Last week Sir Paul said he was taking life day by day.
"I don't think Houdini will do it this time," he said.