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The purpose of this study is to evaluate the treatment of patients with acute diverticulitis in the inpatient setting using minimal intervention. This was a retrospective study of 75 patients admitted over a 3-year period with acute diverticulitis as evidenced by computed tomography (CT) and clinical scenario. Of the patients enrolled, 24 (32%) had abscesses identified on their initial CT scan. An additional four patients had abscesses noted on a subsequent CT scan obtained because of lack of complete improvement with medical management, thus raising the total number of abscesses to 28 (37%). Of the patients with abscesses, 10 (36%) underwent drainage using a CT-guided percutaneous or ultrasound-guided transrectal approach an average of 6 days after admission. Of the 75 patients, five (7%) required operative intervention during the initial hospitalization for failure of medical management, two (40%) of whom had abscesses on presentation. The overall median length of hospitalization was 5 (interquartile range [IQR] 4-9) days, and 18 patients (24%) had recurrences during the study period. Our conservative approach to percutaneous and surgical intervention resulted in relatively low percutaneous drainage, a low operative rate, and a reasonable length of hospitalization and recurrence rate. [ABSTRACT FROM AUTHOR]