Medibank says its operations are now carbon neutral in line with a commitment to achieving this status by the end of 2018.
Medibank said in a statement that it recognises the science of climate change and its impact on human health.
"Further to this, we recognise that we have a responsibility to play our part in reducing carbon emissions," it said.
According to group executive, Kylie Bishop, the insurer measured its greenhouse gas emissions for the first time during the year.
“It was important to get a baseline view of where Medibank is at and what areas we need to focus on to reduce our footprint,” said Ms Bishop.
“This work is informing Medibank’s long-term environmental sustainability strategy as well as our approach to carbon offsets.”
Medibank is supporting offset projects including one focused on wind-based power generation with the co-benefits of supporting unemployed youth and increasing access to preventative healthcare for local communities.
Another project supports indigenous fire managers and their partners in the customary burning and fire abatement in Arnhem Land.