Hi Elbarc,
if you walk in to KKH directly without a referral letter from any polyclinic, you will need to pay private hospital rate. In order to get subsidized rate, need to go to a polyclinic and see a doc, then they will give you a referral letter.
But of coz if cost is not a concern to you, you can go to the nearest gynae. As you know, you will have to visit your gynae like once every 2 weeks or once every month, so choosing someone you are comfortable with and near you is important.