All of your codes are correct except 75605 (thoracic aortogram). You should use 75650. Below are coding instructions from Zhealth Publishing:
2. Cervicocerebral arch angiography is often performed in conjunction with imaging codes 75680 (cervical carotid bilateral), 75671 (cerebral carotid bilateral), and 75685 (vertebral), and occasionally with codes 75716 (extremity bilateral) and 75662 (external carotid bilateral). This procedure additionally serves as a guide for safe catheterization of vessels supplying the arms, neck, and face and may show evidence of eccentric calcified plaque, proximal stenoses, aneurysm, and dissection.
3. Cervicocerebral arch angiography is different from the cardiac "aortic root" evaluation (coded 93567). Aortic root injection and imaging is performed during cardiac catheterization for evaluation of the ascending thoracic aorta and "root", for aortic valvular disease, or to evaluate the origins of the native coronary arteries or saphenous vein bypass graft origins.
4. If more selective catheterization is performed from the same access site [e.g., right or left carotid from a femoral access site (36216, 36215-59)], the non-selective code 36200 is deleted, as it is considered bundled with the selective code. A second arterial access is coded separately and may require modifiers.
5. Although both the cervicocerebral arch and the descending thoracic aorta are in the thoracic cavity, physican documentation and verbiage may cause confusion. The physician may call a cervicocerebral arch exam a "thoracic" aortogram (75605) when evaluation of the arch and the origins of the great vessels was actually performed and documented. If this is the case, discuss the terminology and documentation with your physician and use code 75650.
6. If, during a cardiac catheterization, the physician injects the aortic root to evaluate for saphenous vein grafts and aortic vascular disease, but also mentions the arch vessels (without medical necessity), do not code 75650, as the findings are incidental. There must be medical necessity to perform and charge for additional diagnostic angiography. Use code 93567 in this case.
7. Code 75650 is used to describe imaging related to the evaluation of the origins and proximal portions of the blood supply to the head and neck (common carotid, brachiocephalic, subclavian, and vertebral arteries) and the ascending, transverse, and proximal descending portions of the thoracic aorta (the cervicocerebral cerebral arch).
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