CPT® Code 75870

The CPT® Code 75870 refers to the procedure known as venography of the superior sagittal sinus, which involves radiological supervision and interpretation. This procedure is specifically designed to evaluate the superior sagittal sinus (SSS), a significant venous structure located within the brain. The SSS is a channel-like formation situated between the layers of the dura mater, the protective covering of the brain. It plays a crucial role in draining blood from the anterior cerebral hemispheres and is essential for maintaining proper cerebral circulation. The SSS runs in a triangular shape from the inner surface of the frontal lobe, along the edges of the two parietal lobes, and extends into the upper part of the occipital lobe. During the venography procedure, a radiopaque contrast medium is injected, allowing for enhanced visualization of the SSS through fluoroscopy. This imaging technique is particularly useful for diagnosing conditions such as hemorrhage or thrombosis, which may arise from various factors including traumatic skull injuries, arteriovenous fistulas, congenital malformations, or tumors. The SSS receives blood from several sources, including the superior cerebral veins and pericranial veins, and it also facilitates the drainage of cerebrospinal fluid via arachnoid granulations. To effectively visualize the SSS, both carotid arteries may need to be catheterized, as the sinus is asymmetrical and not paired. This allows for the injection of contrast medium to obtain standard anteroposterior (AP) views as well as lateral or oblique views. X-ray imaging is then utilized to assess the proximal and distal points of the SSS, providing insights into its origin, endpoint, and the overall pattern of venous blood flow as it empties into the confluence of sinuses. The CPT® Code 75870 encompasses the radiological supervision of this venography procedure, which includes the review and interpretation of the obtained images, along with the generation of a written report detailing the findings.