BackgroundCurrent evidence supports that many patients do not use prescribed opioids following reconstructive pelvic surgery, yet it remains unclear if it is feasible to eliminate routine opioid prescriptions without a negative impact on patients or providers. ObjectiveTo determine if there is a difference in the proportion of patients discharged without opioids after implementing a bundle of opioid-sparing strategies and tiered prescribing protocol (BOSS) compared to usual care after minimally invasive pelvic reconstructive surgery (transvaginal, laparoscopic or robotic). Secondary objectives include measures of patient-perceived pain control and provider workload. Study DesignThe BOSS intervention was implemented as a division-wide evidence-based practice change on August 1, 2022. This retrospective cohort compares a 6-month post-intervention (BOSS) cohort to 6- month pre-intervention (usual care) of patients undergoing minimally invasive pelvic reconstructive surgery. A 3-month wash out period was observed after BOSS initiation. We excluded patients <18 years, failure to consent to research, combined surgery with other specialties, urge urinary incontinence or urinary retention procedures alone, and minor procedures not typically requiring opioids. Primary outcome was measured by proportion discharged without opioids and total oral morphine equivalents (OME) prescribed. Pain control was measured by pain scores, post-discharge prescriptions and refills, phone calls and visits related to pain, and satisfaction with pain control. Provider workload was demonstrated by phone calls and post-discharge prescription refills. Data were obtained through chart review on all patients who met inclusion criteria. Primary analysis only included patients prescribed opioids according to the BOSS protocol. Two sample t tests compared continuous variables and chi-square tests compared categorical variables. Results416 patients were included in the primary analysis (207 BOSS, 209 Usual Care). Baseline demographics were similar between groups, except a lower proportion of IBS (13% vs 23%; p<0.01) and pelvic pain (15% vs 24.9%; p=0.01), and higher history of prior gynecologic surgery (69.1% vs 58.4%; p=0.02) in the BOSS cohort. The BOSS cohort was more likely to be discharged without opioids (68.1% vs 10.0%; p<.01). In those prescribed opioids, total OME on discharge was significantly lower in the BOSS cohort (48.1 vs 81.8; p<.01). The BOSS cohort had a 20.6 greater odds (CI 11.4, 37.1) of being discharged without opioids after adjusting for surgery type, arthritis/joint pain, IBS, pelvic pain, and contraindication to NSAIDs. The BOSS cohort was also less likely to receive a rescue opioid prescription after discharge (1.4% vs 9.5%; p=0.03). There were no differences in opioid prescription refills (19.7% vs 18.1%; p=0.77), emergency room visits for pain (3.4% vs 2.9%; p=0.76), postoperative pain scores (mean 4.7 vs 4.0; p=0.07), or patient satisfaction with pain control (81.5% vs 85.6%; p=0.21). After BOSS implementation, the proportion of postoperative phone calls for pain also decreased (12.6% vs 21.5%; p=0.02). Similar results were identified when non-adherent prescribing was included in the analysis. ConclusionsA bundle of evidence-based opioid sparing strategies and tiered prescribing based on inpatient use increases the proportion of patients discharged without opioids after minimally invasive pelvic reconstructive surgery without evidence of uncontrolled pain or increased provider workload.