An 80-year-old man with advanced peripheral vascular disease with failed vascular grafts now presents with gangrene of the RLE. The patient receives a below knee amputation. The pathologist receives the amputated limb and examines it both grossly and microscopically. The margins showed viable tissue. What code will the pathologist report?
a) 88305
b) 88307
c) 88309
d) 88302