Instrumented fusion

Any code with R371

R371 – instrumentation – deformities – segmental procedure – with fusion

Noninstrumented fusion

Any code with E567 and no R371

E567 – arthrodesis – fusion with other procedure(s)

Decompression

Any code with N185 without R371 or E567

N185 – decompression – posterior – posterior laminectomy 1 or 2 levels, cervical, thoracic, lumbar