The origin of the DHO story started in 1992 when Dr. Grenville Thynne, an internationally recognised Surgeon having trained at the Royal Marsden Hospital (UK) and Mayo Clinic (USA), as well as his birth place Australia, and his wife Jan, an Australian Registered Nurse with a UK accredited nursing diploma, established Health Corporation of Australia (HCA).

The vision was to create a hospital company and assist in research and education in the health care sector. Shortly thereafter the well-respected and late Mr. Lindsay Yeo AO (Order of Australia) and Dr Thynne's son Nathan joined HCA as the Chairman and Managing Director respectively.

It was from this initial base that the group grew various businesses in the Healthcare, Wellbeing and eHealth sectors over the next decades until present day.