Hi HemeOncHopeful19! Thanks for the message.
I think the most appropriate answer is each practice decides how they want to operate within the regulatory environment that is set up by their specific state statutes, federal statutes and medical boards. Various groups can have a different comfort level of operations and interpretation of the confines. For example, Stark Law (litigation on this does exist) and ancillary services need to be closely evaluated, and even attorneys can have different opinions and conflicting stances on the business arrangement. Due to variability, a grey-zone can exist in the interpretation, perspective, comfort level of operations and risk tolerance of an action based on the collective interpretation of the arraignment. Operating at the limits of an agreement may be financially advantageous, though there can be a risk tolerance association. Best Wishes!