Modifier 79

The billing modifier 79 is a code that can be used to indicate that a procedure was performed during a postoperative or global period. When submitting claims with the modifier 79, it's important to include documentation explaining the reason for the change in date. Otherwise, the claim may be denied. In addition, the modifier can only be used if the procedure is unrelated to any other services that were provided on the original surgery. As a result, the billing modifier 79 can be a useful code for documenting and billing for unexpected changes in patient care.