Finally Simple instructions for completely filling out a UB04 form We take you through the form line by line, and box by box in easy to understand language. No more sifting through all of that technical jargon Find out how to use Rev codes and value codes correctly. Learn what to use for "type of bill." Don't let your clinic or facility lose any more money to denials for incomplete information on the UB04 form. Here are the easy to understand answers to all your questions.