Dozens of nurses, doctors and other healthcare workers will protest outside AGL's Melbourne headquarters calling for the energy giant to replace coal with renewable energy by 2030.
The action kicks off at 11am on Monday and will feature a mock medical ward to demonstrate the health impacts of air pollution and climate change.
Protesters will deliver an open letter signed by 25 health organisations and 600 healthcare workers, calling for AGL to commit to the World Health Organisation's recommendation.
"As frontline healthcare workers, we've seen the deadly impacts of COVID-19 but we've also seen the health impacts of climate change as heatwaves and bushfires continue to get more frequent and more severe," Australian Federation of Medical Women president Magdalena Simonis said.
"As Australia's biggest climate polluter, AGL must put people's health first and commit to replacing coal with renewable energy this decade if we are to avoid the worst impacts of the climate crisis."
Echuca Emergency Physician Simon Judkins said without rapid action to replace coal "our already stretched health system will struggle to provide the high-quality care that we all need deserve".
AAP has contacted AGL for a response.
