A fusion of the vertebrae, which is also known as an arthrodesis procedure, is a procedure performed to cause a part of two or more vertebrae to “fuse” together over time. The procedure involves placing bone graft between the parts of the vertebrae the physician wants to fuse together. The goal of the procedure is to prevent movement of vertebrae which are causing the patient pain and also helps to stabilize the spine when it has been compromised by disease. Some common diseases that impact the spine include but are not limited to degenerative disk disease, spondylosis, and spondylolisthesis.
Fusions are first classified as either anterior fusions where the surgeon makes an incision from the front of the body and works his way down to the spine or as posterior where the surgeon makes an incision from the back of the body and works his way down to the spine that way. For posterior fusions, we then have some more options – the fusion can be posterior/posterolateral only, interbody, or combined. When an operative report directly tells us what type of fusion is performed, it can be straightforward to line up the term posterior, interbody, or combined fusion to the code descriptions in the CPT manual. But what happens when the surgeon doesn’t use one of these terms? Are we unable to code the procedure without getting additional information from the physician? Fortunately for us coders, there are some keys we can look for to help us determine the type of fusion performed. Continue reading “Interbody, Posterior, and Combined Fusions”