Have you asked the hospital? Both of my girls were born at MMC however I transferred at 20 ish weeks with both after I found out about their problems. I had my 12 week scans and Amnio/CVS done privately before this date. After I was transferred to Monash they organised all of my scans (and there were many) and I did not pay at all, they were bulk billed.

Otherwise, from memory my blood test was around the $100 mark (they send out a bill) and the ultrasound was just under $200 (you pay on the day) for the 12 week NT testing, I did get some money back for the ultrasound, I *think* I got some back for the bloodtest too.

The hospital should definately bulk bill your 20 week scan and any others if needed.