Question: Tennessee Subscriber Answer: Your arthrodesis code will be either 22610 (Arthrodesis, posterior or posterolateral technique, single level; thoracic [with or without lateral transverse technique) or 22600 (Arthrodesis, posterior or posterolateral technique, single level; cervical below C2 segment). Lastly, include +22840 (Posterior non-segmental instrumentation [e.g., 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]) for the screw fixation. Assuming the bone removed in the laminectomy is used to stimulate fusion, you can also use 20936 (Autograft for spine surgery only [includes harvesting the graft]; local [e.g., ribs, spinous process, or laminar fragments] obtained from the same incision [List separately in addition to code for primary procedure]).