KKH subsi to private

I recently tried to call KKH to convert to private patient from subsidised patient. The appointment hotline very quickly booked an appointment for me as a private patient with my desired gynae giving me a few appointments dates. However, they didnt ask me my EDD. Can i check if securing an appointment means that the chosen private doctor would be the one delivering (confirmed)? Or I have to check with the doctor for her availability for my delivery during my first appointment with her?