Please know that this company does not follow the billing guidelines set forth by insurance providers such as Blue Cross Blue Shield of AZ. They will "request" (ie. require) you prepay your negotiated share of your treatment upon arrival. This is counter to the contract agreement your insurer may have with providers. As an insured individual you are NOT required to prepay these shares are that's what the billing reviews are for.
Granting them them access to your deductible amounts may make it appear they know what you have left and such but the reality is that the deductible is a always changing due to other open statements and bills. Today you may be pre paying only to find you did not need to once your insures processes other claims elsewhere. They of course you'd have to fight to get your money back...good luck with that. Not recommended due to poor business practices.