CPT code 36226 represents the imaging supervision and interpretation component of catheter-based angiography when a catheter is advanced through a distal artery into the thoracic aorta and aortic arch and contrast material is injected to obtain diagnostic X‑ray images. This code captures physician oversight and image interpretation for procedures that evaluate the thoracic aorta and aortic arch for aneurysm, dissection, stenosis, or other vascular disease. Nationally, accurate use of this code affects clinical documentation, interventional radiology and vascular surgery billing workflows, and aggregate utilization reporting for advanced vascular imaging.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical context for the code, typical sites of service, and a rundown of common modifiers. The publication summarizes payer coverage patterns and billing considerations, presents national benchmark metrics where available, and highlights recent policy or guideline updates relevant to angiographic imaging supervision and interpretation. The content is intended to inform clinicians, coding professionals, and policy analysts about appropriate coding practice and the administrative context surrounding CPT code 36226.