Subsidised at kkh, changed to private doctor @ mount alvenia near birth possible?

Hi, I am currently 13 weeks pregnant with my first baby. Anyone have any clue if we can go for our check up via the subsidised route at kkh till near birth? We would like to deliver at mount alvenia and we have a doctor in mind. But because this pregnancy is low risk, we were thinking to go for scans and check up through the subsidised route to save money. Please advise. Thank you!