A few helpful things for your contract: Clauses stating you don't negotiate fees between the provider and insurance payers, the exact date each month when their fee to you is due and penalties for late payments, your right to adjust your fee at regular intervals, any legal disputes between you and the provider to be settled in your state and county. Important: Once you've written your contract, have it reviewed by an attorney before you or anyone signs it. A few dollars in legal fees could save you a great deal later on.
Contact Alice and/or Michele for literature on the subjects you'd like information on. They are experienced billers and have years of real world experience. Theirs is the best IMHO