Background Laparoscopic appendectomy can be performed on a fast-track, short-stay, or outpatient basis with high success rates, low morbidity, low readmission rates, and shorter length of hospital stay. Cost savings from outpatient appendectomy have not been well described. We hypothesize that outpatient laparoscopic appendectomy is associated with cost savings.

Methods We performed an original retrospective cohort analysis of patients undergoing laparoscopic appendectomy between June 2013 and April 2017 at our academic medical center before and after implementation of an outpatient protocol which began on January 1, 2016. We assessed appendicitis grade, length of stay (LOS), cost, net revenue, and profit margin.

Results After protocol implementation, the percentage of patients discharged from the the postanesthesia care unit (PACU) increased from 3.7% to 29.7% (χ² p<0.001). The proportion of inpatient admissions and admissions to observation decreased by 5.7% and 20.3%, respectively. On average, PACU-to-home patients had a total hospital cost of $4734 compared with $5781 in patients admitted to observation, for an estimated savings of $1047 per patient (p<0.001). Comparing the time periods, the mean LOS decreased for all groups (p<0.001). Appendicitis grade was higher in those who required inpatient admission, but could not distinguish which patients required an observation bed.

Discussion Outpatient appendectomy saves approximately $1000 per patient. Adoption of an outpatient appendectomy pathway is likely to be gradual, but will result in incremental improvement in resource utilization immediately. Grade does not predict which patients should be observed. Considering established safety, our data support widespread implementation of this protocol.

Level of evidence III.