If a patient had 3 holes/tears in the right eye, and two of them were superior and lasered (67145) first on 1 DOS, then patient returned 3 weeks later for the same eye had another hole/tear that was inferior can I use a modifier 59 & 79 for the 2nd visit with the same cpt code 67145, since it was another session for a different location in the same eye? I'm so confused! 