I just had my baby boy at Thomson Medical Center on 28 march. Stayed in 2-bedded but paid for 4-bedded rate. Thomson Medical Center is usually very busy. Though my experience was generally pleasant, I wish they can have more staff so my bed sheet could be changed earlier and the toilet be cleaned earlier. I had cesarean and stayed only 2 days. Baby too. So my bill was about $5.6k. Paid $2.1k cash.
You can check the average bill size on their website.