Make sure you are not in a state that prohibit's providers from fee-splitting arrangements. If not then I would agree with Michele, only I would add that you have to remember if you only take a % on insurance payments it basically means your doing a lot of free work and if the practice is handling billing of patient's and you the insurance payments, then you have two sets of accounting and that's a big risk if there is an audit. There should never be two sets of A/R.