Dr. Smith has determined that Mary has a 0.4-cm area of diseased tissue in her left ethmoid sinus that needs to be excised. Dr. Smith, using an intranasal approach, placed topical agents on the nasal mucosa to shrink the blood vessels. Local anesthesia was injected, and he retracted the middle turbinate to expose the sinus opening. A small curette was advanced to locate the diseased ethmoid cells of the anterior sinus. The diseased cells were removed.

what cpt code?