KKH A1 Ward is medisave claimable?

This is my first pregnancy, I’m going to private route after 20 weeks detail scan onwards. I have questions regards to the A1 ward. My husband opt for A1 ward, so I’m curious since we will be under private soon is the final bill for A1 ward can claim partially using medisave? Is it true that we will need to deposit first for the A1 ward? How does it work?