Time-Driven Activity-based Costing and Outcomes of Same-Day Discharge vs Inpatient Robotic Partial and Radical Nephrectomy.

Objective: To assess the outcomes, total healthcare utilization, and cost savings for same-day discharge (SDD) vs inpatient robotic-assisted partial nephrectomy (RAPN) and robotic-assisted radical nephrectomy (RARN).

Methods: We compared 146 RAPNs and 65 RARNs consecutively performed as SDD (RAPN=21, RARN=9) vs inpatient (RAPN=125, RARN=56) from April 2015 to May 2023 at two academic medical centers. We collected baseline demographics, perioperative characteristics, and 30-day complications. We applied the Time-Driven Activity-Based Costing analysis to compare total costs of RAPN and PARN throughout the cycle of care, including inpatient vs SDD.

Results: Baseline demographics and comorbidities were similar between patients undergoing inpatient vs SDD RAPN and RARN. One Clavien-Dindo grade II complication (3.3%) requiring readmission due to wound infection for antibiotics occurred after SDD RAPN; no complications occurred after SDD RARN. Two unscheduled office or emergency department visits (6.7%) occurred after SDD RAPN for surgical-site infection and urinary retention. SDD vs inpatient RAPN and RARN demonstrated a $3091 (18%) and $4003 (25%) overall cost reduction, respectively.

Conclusion: SDD RAPN and RARN result in cost savings of 18%-25% without a difference in complications, and thereby improves value-based care for appropriately selected patients.