An intra- oral X-ray costs in the range of $30-50 in Australia.
An extra- oral X-ray costs about $90-200 in Australia.
Note. You can actually get a panoramic X-ray (OPG)
taken at your nearest X-ray centre free under Medicare, if the dentist writes you a referral. A lateral cephalogam needed as part of orthodontic treatment can also be obtained in this way.
The ITEM number for an intra-oral X-ray is 022
The ITEM number for an extra-oral X-ray is 032
So you can check with your insurance provider to see what they will give you back and work out what the gap will be.