CPT® spinal surgery coding

1.What is the correct CPT® code for an anterior arthrodesis for a spinal deformity, with a cast, for five vertebral segments?

2.What is the correct CPT code for a thoracic arthrodesis using a posterolateral technique?

3.What is the correct CPT code for a partial excision of a single posterior vertebral component of the cervical spine for a bony lesion?

4.What is the correct code for the removal of posterior segmental instrumentation?

5.What is the correct CPT code for a total disc arthroplasty via an anterior approach, including the discectomy to prepare the interspace, for a single lumbar interspace?