"I can't say I follow the sport closely," Newman says.
"But basketball is a big sport on the North Shore with the Breakers being based here."
Abercrombie is an ambassador for the District Health Board's fundraising arm, the Well Foundation.
He was accompanied by Santa on his rounds of the wards and stopped to say hello and pose for pictures with staff, patients and visitors.
Waitemata DHB chief executive Dr Dale Bramley said Christmas was often a particularly challenging time for patients.
"Our staff work hard to keep them and their families as comfortable as possible and spend a lot of time decorating the wards to try and give them some sense of what they might otherwise be missing out on.
"Gestures like this really put the icing on the cake and add to the festive spirit."