Southern Cross Health Society, the health insurance arm of the broader Southern Cross business, is currently reviewing its creative agency partnership.
Southern Cross Health Society chief marketing officer Chris Watney confirmed that there was a pitch currently taking place, but would not confirm which agencies were involved.
"I can confirm that we currently looking at our options in the market," Watney told StopPress.
StopPress understands that 99, True and what's thought to be one or two other unnamed agencies are vying for the business.
Both 99 and True refused to confirm or deny their involvement and would not comment on any aspects of the pitch.
The incumbent agency on the account is Contagion. At this stage, it is unclear whether the agency is involved in the pitch.
Before working with its current agency partner, the business was with Barnes, Catmur & Friends, which developed the well-received 'Advice to a younger me' campaign.
With over 853,000 members, the Southern Cross group is the biggest provider of health insurance in the country.
In the 2017 financial year, the business reported a surplus of $6.3 million.