Cost Variation in Bariatric Surgery Across the United States

High costs have been cited as a barrier to utilization of bariatric surgery despite the increasing prevalence of obesity in the United States. The present work characterizes the center-level variation and risk factors for increased hospitalization costs following bariatric operations.

The 2016-2019 Nationwide Readmissions Database was queried to identify all adults undergoing elective laparoscopic sleeve gastrectomy (SG) or Roux-en-Y gastric bypass (RYGB). Random effects were estimated using Bayesian methodology and used to rank hospitals by increasing risk-adjusted center-level costs.

Of an estimated 687,866 patients at an annual 2435 hospitals, 69.9% underwent SG and 30.1% RYGB, with median costs of $10,900 (interquartile range: 8600-14,000) and $13,600 (10,300-18,000), respectively. Hospitals in the highest tertile of annual SG and RYGB volume were associated with a $1500 (95% CI - 2,100, -800) and $3400 reduction in costs (95% CI -4,200, -2600). Approximately 37.2% (95% CI 35.8-38.6) of variation in hospitalization costs was attributable to the hospital. Hospitals in the top decile of center-level costs were associated with increased odds of developing complications (AOR 1.22, 95% CI 1.05-1.40) but not mortality.

The present work identified significant interhospital variation in the costs of bariatric operations. Further efforts to standardize costs may enhance the value of bariatric surgical care in the US.