Usually, we instruct coders that if three-dimensional (3D) reconstruction of images is not described in the medical report, it is appropriate to code for a CT study and not a CTA study. This situation most often arises when physicians dictate notes following a CT of the chest for pulmonary embolism. Often physicians identify such a study as a CTA because during the study they are looking at vessels, but such a study is not really a CTA for coding purposes. When coding a CTA of the abdominal aorta with runoffs (code 75635), if the coder does not see a dictation specifying that a 3D postprocessing technique was used, should the coder code for a CT of the abdomen with contrast, a CT of the right leg with contrast, and a CT of the left leg with contrast? The 3D requirement for a CTA study when coding abdomen with runoff creates an issue if the physician does not document a 3D postprocessing technique.