My doctors often use the same scope for both nasal and laryngeal endoscopy, so I can't generally bill for both. The previous comment is correct, the 31231 has a higher RVU. I've also heard in a seminar before (I'll have to dig up my documentation) that the scope that goes the furthest into the body should be billed, which would be the 31575. I, however, tend to lean more toward which scope pertains more to the encounter. If the patient is having chronic sinus issues in addition to throat problems, but the doctor orders a CT of the sinuses and prescribes a nasal spray, I feel like the nasal endoscopy is the more pertinent scope to the visit. Hope that helps!
diagnosis codes, diagnosis coding