Maybe I am wrong but I thought that the medicare rebates for antinatal visits weren't really changing and that the major change was the planning and management fee (effectively birth fee) which is the big one that you pay the Obs to deliver the baby (which I am guessing that you will have to pay or they won't be there)
Also, I am not sure that you will find an
Ob that will deliver your baby privately without having the full antenatel care - or at least several visits. It has effects on their insurance - if you are private they have to cover themselves - if you are public the hospital covers them.
My Obs told me the other day that he has a no gaps policy at the hospital unless I haven't completed paying the management fee in which case there will be out of pocket expenses for the delivery as well (which pretty much equal the management fee).
Also, Obs don't control what anaests charge - they send the bills seperately.
So, I suppose what I am trying to say is that I really don't think that you will save much money at all by trying to avoid the antenatal visits. But maybe call a few that deliver where you want and ask them the question.