mbe 133, mpre 75
The Office of the Attorney General gives this as the general answer. First, you must have graduated from an ABA accredited law school. Additionally, you need to be either a member in good standing of any state bar for more than five years, or if you are a member in good standing less than five years, have received a MBE scaled score above 133 and an MPRE score above 75.
So, if you pass your state bar and got better than a 133, you should be able to waive into DC after filling out their application. Conversely, if you get better than a 133 and fail your state bar, you're probably going to have to take your state bar again. You can always contact the DC bar examiners and find out for sure.
Source: AG