Dear Jjald,
I am not sure how far into your pregnancy you are, but my doctor sent me to Dr Danny Leung at the HK Sanatorium (Happy Valley) for my 12 week scan. However, I did need a referral. Unfortunately we did have to wait around one hour in his rooms, however he apologised when we got in there and advised he had had a prior emergency. Once we were in there though, he had two screens so he could look at one whilst he faced me, and I could see a big plasma at the end of the bed, so I could see exactly what he was looking at. He was very informative and welcomed my husband and daughter into the room, who also could see the plasma. He was patient, informative, and had a lovely bedside manner. He even took the time to determine the sex of the baby and explain how they do this. Whilst in there, he did blood test and was very gentle. My appointment was at 10am, and they phoned me by the end of the day to advise the results of my NT scan, which I thought was good service. All up, I think it cost around $1800.
You may be able to ring your doctor for them to send you a referral, without having to actually make an appointment. My doctor forgot to write me a referral letter, and they just phoned my clinic who faxed something through when I was there.
I hope this helps, please let me know if you have any further queries. Good luck with your pregnancy.