What is the cpt-4 code for bilateral diagnostic nasal endoscopy The physician inserted an endoscope into the left nostril to evaluate nasal structures The right nostril was also examined?

The CPT-4 code for bilateral diagnostic nasal endoscopy is 31231. This code is used when an endoscope is inserted into the nasal cavity for diagnostic purposes, including the evaluation of nasal structures in both nostrils. Since the procedure involved examining both the left and right nostrils, this code accurately reflects the bilateral nature of the endoscopy.