I think that's one of the issues most people have, is when to use it. We were told at our facility, if the Dr. documents it anywhere, code it. It does affect many, many parts of the body and healing process. The smoke could be a mitigating factor in eye problems or sinus problems, lungs, cancer, wound care, healing lacerations, etc. So, our standing is, if it's documented code it. There will be many different standings on this. Good luck!