General Versus Non General Anesthesia for Spinal Surgery: A Comparative National Analysis of Reimbursement Trends Over 10 Years

Introduction: Nongeneral anesthesia (non-GA) spine surgery is growing in popularity and has facilitated earlier post operative recovery, reduced cost, and fewer complications compared with spine surgery under general anesthesia (GA). Changes in reimbursement policies have been demonstrated to correlate with clinical practice;however, they have yet to be studied for GA vs non-GA spine procedures. We aimed to investigate trends in physician reimbursement for GA vs non-GA spine surgery in the United States.

Methods: We queried the ACS-NSQIP for GA and non-GA (regional, epidural, spinal, and anesthesia care/intravenous sedation) spine surgeries during 2011–2020. Work relative value units per operative hour (wRVUs/h) were retrieved for decompression or stabilization of the cervical, thoracic, and lumbar spine. Propensity score matching (1:1) was per-formed using all baseline variables

Results: We included 474 706 patients who underwent spine decompression or stabilization procedures. GA was used in 472 248 operations, whereas 2458 operations were non-GA. The proportion of non-GA spine operations significantly increased during the study period. Operative times (P < .001) and length of stays (P < .001) were shorter in non-GA when compared with GA procedures. Non-GA lumbar procedures had significantly higher wRVUs/h when compared with the same procedures performed under GA (decompression;P < .001 and stabilization;P= .039). However, the same could not be said about cervical thoracic procedures. Lumbar decompression surgeries using non-GA witnessed significant yearly increase in wRVUs/h (P < .01) contrary to GA (P= .72). Physician reimbursement remained stable for procedures of the cervical or thoracic spine regardless of the anesthesia.

Conclusion : Non-GA lumbar decompressions and stabilizations are associated with higher and increasing reim-bursement trends (wRVUs/h) compared with those under GA. Reimbursement for cervical and thoracic surgeries was equal regardless of the type of anesthesia and being relatively stable during the study period. The adoption of a non-GAtechnique relative to the GA increased significantly during the study period.