In regards to payment (since you already seem to have lots of people giving you info on the three 'general' scans!), all radiology places charge different amounts. Usually you end up paying about $50-150 AFTER medicare's rebate.

However, I'm having my 18-20wk scan soon, and found that just by asking the Gp they are able to *make* it bulk billed, simply by writing on the form! How great is that. Wish I'd known that earlier!