I currently code and bill for a surgical trauma practice. Should Box 24C always be checked for each and every line of service on all outgoing claims? Does the provider have to document it was trauma or emergency related? Or as the coder/biller is it up to my discrection? I'm hesitant about assuming all of the claims should be submitted like this. I've searched the CMS website for guidance but I'm unable to locate any. In my current role, I'm told that as long as the patient presents to the ER it should be checked. Thanks in advance for helping!