I paid $260 for my NT scan and recieved a rebate from medicare of around $55 - $60 (i cant remember the exact amount). My blood test was bulk billed, so didnt have to pay anything for it.

I had the scan in a private hospital (just because my midwife refered me to there), and the bloods were done through a pathology place run by the public hospital. The pathology place was just downstairs from the ultrasound rooms, and the Ob just told me to go there for my blood test.