See other threads concerning this procedure and could use help to resolve coding discussion. A drug-induced sleep endoscopy was done with a b/l tonsillectomy. Diagnosis are hypertrophy of tonsils and OSA. Drug induced sleep endoscopy was done to identify the level of collapse. Procedure: The flexible fiberoptic scope was used to visualize the nasal cavities & the nasopharynx, result was anterior-posterior collapse of the palate. In the oropharynx showed anterior-posterior collapse of the tongue. Glottis appeared normal. Tonsillectomy then performed. My thought is CPT code 31575 is the code for drug induced sleep endoscopy, Laryngoscopy, flexible, diagnostic, because the documentation states the glottis was normal. Others think 92511 diagnostic nasopharyngoscopy with endoscopy, views the surface area extending from the posterior edge of the soft palate to the nasopharyngeal wall, including the eustachian tube. (not coded with the tonsillectomy code) Can anyone provide clarification? Thank you!