The AMA Code of Medical Ethics talks about this in Opinion 6.10 - Services Provided by Multiple Physicians: “…………It is ethically permissible in certain circumstances, however, for a surgeon to engage other physicians to assist in the performance of a surgical procedure and to pay a reasonable amount for such assistance, provided the nature of the financial arrangement is made known to the patient. This principle applies whether regardless of the assisting physician is the referring physician. (II)………………..”