ASA code 00670 states that the code is appropriate if the procedure is performed with spinal instrumentation then following a comma, continues with on multiple vertebral levels. Does this mean that there has to be multiple levels instrumented or that any instrumentation, even at one level, would be appropriate? Any help would be much appreciated.![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)