Use modifier 73 to report discontinued outpatient/hospital ambulatory surgical center (ASC) procedure prior to the administration of anesthesia.
Physicians should not use this modifier. This is only appropriate for use by the ASC.
Due to extenuating circumstances or threaten patient well-being:
Prior to procedure started/patient's surgical preparation (including sedation or taken to procedure room)
Prior to administration of anesthesia (local, regional block or general)
Physician cancelled the surgical or diagnostic procedure prior to administration of anesthesia and/or surgical preparation of the patient
Elective cancellation of a procedure
Surgeon cancels or postpones because patient complained of a cold or flu upon intake