The 66-year-old woman was escorting her husband from her car in the car park of Casey Hospital in Berwick around 10.45am when a man who had just left the hospital allegedly jumped into the driver’s seat of her car.
She allegedly tried to stop him driving away and was struck by the moving car.
The Upper Beaconsfield woman has been transported to The Alfred Hospital in a critical condition.
The alleged offender and the stolen vehicle remain on the run.
The car is a 2012 brown Ford Territory with registration DEX 581.