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Background: Many hospitals across Australia and New Zealand have implemented acute care surgery (ACS) models over the past decade, often with improved outcomes such as reductions in wait time to surgery, complications and length of stay. The aim of this study was to evaluate the outcomes of patients who underwent non‐elective appendicectomy and cholecystectomy and compare these with the results observed shortly after the implementation of an ACS model at our institution 10 years earlier. Methods: A retrospective review of contemporary patients who underwent non‐elective appendicectomy and cholecystectomy compared with historical data was performed. Primary outcomes were wait time to surgery, surgical complications and length of stay. Results: In the contemporary cohort, 263 patients underwent non‐elective appendicectomy over a 1‐year period compared with 226 patients in the historical cohort. The median wait time to surgery had increased (17.7 versus 9.6 h, P < 0.001). There was no significant difference in a composite end‐point of complications and readmissions (8.0% versus 9.3%, P = 0.61). The length of stay was unchanged. There was greater use of preoperative imaging and reduced overnight operating. For non‐elective cholecystectomies, 132 patients underwent this procedure in the contemporary cohort over a 2‐year period compared with 115 patients in the historical cohort. There were no significant differences in wait time to surgery (2 versus 1 day, P = 0.13) or complications (9.8% versus 8.7%, P = 0.75). The length of stay was unchanged. Conclusion: The majority of improvements seen shortly following the implementation of an ACS model have been sustained after 10 years. [ABSTRACT FROM AUTHOR]