CPT® Code 22840

Add-On Code

Posterior non-segmental instrumentation (eg, Harrington rod technique, pedicle fixation across 1 interspace, atlantoaxial transarticular screw fixation, sublaminar wiring at C1, facet screw fixation) (List separately in addition to code for primary procedure)

Posterior non-segmental instrumentation refers to a surgical technique used in the treatment of spinal deformities or instabilities. This procedure is typically performed in conjunction with an arthrodesis, commonly known as spinal fusion, which aims to stabilize the spine by fusing together adjacent vertebrae. The term "non-segmental" indicates that the instrumentation is applied to the vertebral segments at the top and bottom of the affected area, without directly attaching to the vertebrae in between. This method allows for the stabilization of the spine while preserving the motion of the intervening segments. Various techniques are utilized in posterior non-segmental instrumentation, including the Harrington rod technique, which employs a long rod secured to the spine with hooks at the upper and lower vertebrae. Other methods include pedicle fixation, which involves inserting screws into the pedicles of the vertebrae above and below a single interspace, and atlantoaxial transarticular screw fixation, which targets the C1 and C2 vertebrae. Additionally, sublaminar wiring at C1 and facet screw fixation are also employed to enhance stability. Each of these techniques is designed to provide robust support to the spine, facilitating recovery and improving patient outcomes following spinal surgery.