G2144 — Functional status measured by the oswestry disability index (odi version 2.1a) at three months (6-20 weeks) postoperatively was less than or equal to 22 or functional status measured by the odi version 2.1a within three months preoperatively and at three months (6-20 weeks) postoperatively demonstrated an improvement of 30 points or greater

HCPCS/CPT