CPT® Code 22630

Arthrodesis, posterior interbody technique, including laminectomy and/or discectomy to prepare interspace (other than for decompression), single interspace, lumbar;

Arthrodesis, specifically the posterior interbody technique, is a surgical procedure aimed at fusing one or more lumbar intervertebral joints. This technique is often referred to as interbody fusion and is primarily utilized to address conditions such as vertebral fractures or instability. The procedure involves making an incision in the back, allowing access to the affected lumbar vertebrae. During the surgery, soft tissues are carefully dissected to expose the vertebrae, and muscle is retracted from the lamina, which is the bony structure at the back of the vertebra. A bone drill is then employed to remove a portion of the lamina, facilitating access to the intervertebral disc. The disc is excised, and the joint space is meticulously prepared for the fusion process. In some cases, additional procedures such as fracture treatment or decompression may be performed, which are separately reportable. A bone graft, which can be harvested from the iliac crest or another site, is prepared for placement in the intervertebral joint space. Alternatively, allograft bone from a bone bank may be utilized. To ensure stability, drill holes are created in the facets or spinous processes of the vertebrae, and wires are threaded through the vertebrae to immobilize the joint. In some instances, other internal fixation devices may be used to enhance stability. After the procedure, a drain may be placed to prevent fluid accumulation, and the surgical wound is closed in layers. This procedure is specifically coded as 22630 for the fusion of a single lumbar intervertebral joint space, while 22632 is used for each additional intervertebral space fused.