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Background Length of hospital stay (LOS) is an indirect measure of surgical quality and a surrogate for cost. The impact of postoperative complications on LOS following elective colorectal surgery is not well defined. The purpose of this study is to determine the contribution of specific complications towards LOS in elective laparoscopic colectomy patients. Materials and methods American College of Surgeon's National Surgical Quality Improvement Program database (2011-2014) was queried for patients undergoing elective laparoscopic partial colectomy with primary anastomosis. Demographics, specific 30 d postoperative complications and LOS, were evaluated. A negative binomial regression adjusting for demographic variables and complications was performed to explore the impact of individual complications on LOS, significance set at P < 0.05. Results A total of 42,365 patients were evaluated, with an overall median LOS 4.0 d (interquartile range, 3.0-5.0). Unplanned reoperation and pneumonia each increase LOS by 50%; superficial surgical site infections (SSIs), organ space SSI sepsis, urinary tract infection, ventilation >48 h, pulmonary embolism, and myocardial infarction each increase LOS by at least 25% ( P < 0.0001). When accounting for additional LOS and rate of complications, unplanned reoperation, bleeding requiring transfusion within 72 h, and superficial SSIs were the highest impact complications. Conclusions In laparoscopic colectomy, each complication uniquely impacts LOS, and therefore cost. Utilizing this model, individual hospitals can implement pathways targeting specific complication profiles to improve care and minimize health care cost. [ABSTRACT FROM AUTHOR]