CPT modifier used for staged or related procedure or service by the same physician during the postoperative period. The physician may need to indicate that the performance of a procedure or service during the postoperative period was (1) planned prospectively at the time of the original procedure (staged); (2) more extensive than the original procedure; or (3) for therapy after a diagnostic surgical procedure. This circumstance may be reported by adding the modifier -58 to the staged or related procedure. This modifier is informational in nature. Do not ask for an adjustment in reimbursement. Monitor reimbursement when using this modifier.This modifier is not used to report the treatment of a problem that requires a return to the operating room. See modifier -78 .