i live in tiu keng leng as well. i'm afraid there's not many specialists in the area. we used to go to hamilton hui in metro town but recently switched to dr simon tseung in OS. he's a GP. been there a few times (unfortunately) since it opened. we thought he was very good and the kids are very comfortable with him.
Dr Simon Polyclinic
Shop B1 LG2, Phase 3 Ocean Shores
2668-3780