Anterior instrumentation; 2 to 3 vertebral segments (List separately in addition to code for primary procedure)
anterior instrumentation; 2 to 3 vertebral segments (list separately in addition to code for primary procedure)
Anterior instrumentation; 2 to 3 vertebral segments (List separately in addition to code for primary procedure)
anterior instrumentation; 2 to 3 vertebral segments (list separately in addition to code for primary procedure)