A vertebral interspace is the non-bony compartment between adjacent vertebral bodies that contains the intervertebral disc and includes the nucleus pulposus, annulus fibrosus, and two cartilaginous endplates. A vertebral segment describes the basic constituent part into which the spine may be divided. It represents a single complete vertebral bone with its associated articular processes and laminae.
(5-38) For CPT spine surgery reporting purposes, what are the defining differences of a vertebral interspace and a vertebral segment? (151)