if a patient had a CT scan of the chest and then also had a CT scan of the abdomen during the same visit, the 59 modifier would be added to indicate that these were two separate services.
Contrast-enhanced cardiac CT angiography (CTA) involves the use of multi-slice CT and intravenously administered contrast material to obtain detailed images of the blood vessels of the heart. Beta-blockers and sublingual nitrates may be administered prior to the scan in order to lower the heart r...