The doctor performed a lumbar ESI, 62311, in addition to 96372 at the same session, same date, office setting. He used the same diagnosis for both and there is not a lot of discussion in the documentation as to why he did the 96372, therapeutic injection, on the same visit (as a matter of fact, I can't really find anything that supports his reasoning to do so). Insurance carrier is Medicare (in NC), and I am thinking that to bill this I would use a modifier 59 on the 96372; however, I am questioning if it is acceptable to even bill the 96372 in the same session without providing burden of proof in the documentation for his reasoning. Any thoughts?