G9753 HCPCS - DOCUMENTATION OF MEDICAL REASON FOR NOT CONDUCTING A SEARCH FOR DICOM FORMAT IMAGES FOR PRIOR PATIENT CT IMAGING STUDIES COMPLETED AT NON-AFFILIATED EXTERNAL HEALTHCARE FACILITIES OR ENTITIES WITHIN THE PAST 12 MONTHS THAT ARE AVAILABLE THROUGH A SECURE, AUTHORIZED, MEDIA-FREE, SHARED ARCHIVE (E.G., TRAUMA, ACUTE MYOCARDIAL INFARCTION, STROKE, AORTIC ANEURYSM WHERE TIME IS OF THE ESSENCE)