I was referring to a study that was performed properly, with abnormal patient results, resulting in a referral for a polysomnography. The reason I opted to go with 794.19 rather than anything else was basically due to a process of elimination...
794.9 Indicated examples of Function studies such as Bladder, Pancreas, Placenta, and Spleen, which didn't seem to fit with the larynx, or the nature of the study, so I decided against it.
I also ruled out 794.2, Pulmonary, because it's not really the lungs, either. That left me with 794.09 and 794.19. Since the larynx isn't part of the brain or central nervous system, I immediately ruled out 794.09. I was left with peripheral nervous system and special senses, which included things such as visual funct., auditory funct., skeletal muscular-electrical activity, and balance. The laryngeal function study just seemed to fit better with those than with the organ systems whose function has to be assessed through nuclear medicine and CT scans.
I'm not saying that I'm certain my choice is correct, but I don't understand why it wouldn't be an applicable code in this situation. What are your thoughts?
I have to understand where I went wrong, so I could use someone else's viewpoint...Thanks!