METHODS: This retrospective analysis evaluated 740 patients who underwent same-day admission for orthopedic surgical intervention from January 2014 to September 2015. The hospital medical records were reviewed to collect demographic, length of stay, and surgical information. Discharge diagnosis codes were used to define patients with OSA. Patients were matched based on sex, age, Medicare Severity Diagnosis Related Groups (MS-DRG) that defined the diagnoses and the procedures that occurred, and their discharge disposition. The hospitalization was grouped into “simple” for patients that had a de-escalation of level of care until discharge, and “complex” for patients that had an initial de-escalation of level of care and then increased to a higher level of care before discharge (such as admission to an Intensive Care Unit or Step-Down Unit). Length of stay (LOS) data were collected for each patient encounter.