Modifier 58, Staged or related procedure or services by the same Physician or other Qualified Health care Professional during the postoperative period. When to Use modifier 58 Modifier 58 is used to identify those situations when a procedure or services may be staged(planned). While a return to the operating room for a related procedure may be commonplace, a staged (planned) procedure or services may not be as routine. I will try to clarify the intent when to exactly use modifier 58 with the procedure code. As per the CPT coding guidelines, Modifier 58 is assigned for any subsequent procedure, Which is planned or has to be performed with the related original procedure. Following three key points should be remembered before appending modifier 58 to the procedure codes. Modifier 78 Unplanned return to the operating / procedure room by the same physician or other qualified health care professional following initial procedure for a related procedure during the postoperative pe