Budget countdown: What doctors can expect

MENTAL health is tipped to have a $2 billion starring role in the Gillard Government's first Federal Budget tomorrow night - but Medicare rebates, hospital upgrades and private health insurance are also expected to feature strongly.

After weeks of speculation and leaks, the Government is expected to finally unveil plans for a $50 million mental health commission to oversee a nationwide strategy for managing the hot-button health issue that critics argue has been overlooked for too long.

The investment is believed to be part of an investment of up to $2 billion by the Government in the sector over four years.