What is the key distinction between a standard CT and a CTA?


Although the data acquired during a CTA exam is primarily focused on evaluating the vessels, data acquisition also includes surrounding skeletal anatomy and soft tissues as acquired in a standard CT. It is important to note that imaging of the vessels alone is not necessarily considered a CTA for coding purposes. To report a code for a CTA, 3D reconstruction post-processing must be done to evaluate the vessels. If there is no 3D reformatting performed, then the exam should be coded as a CT and not a CTA.

This question was answered in our Interventional Radiology Coder. For more hot topics relating to interventional radiology services, please visit our store or call us at 1.800.252.1578, ext. 2.


CPT® copyright 2021 American Medical Association (AMA). All rights reserved.

Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.

CPT is a registered trademark of the American Medical Association.