Length of Stay (LOS) is a critical factor in hospital management, directly affecting healthcare efficiency and financial importance. LOS protocols can vary significantly for Deep Inferior Epigastric Perforator (DIEP) flap procedures used in breast reconstruction, which can influence costs and reimbursement rates for the hospital. Despite the importance of LOS, limited research specifically examines its financial impact on DIEP flap breast reconstructions. Objective: To examine the financial implications of LOS for DIEP flap breast reconstruction cases at a single academic hospital. The goal is to identify opportunities for balancing cost efficiency with the delivery of optimal patient care