The 72-hour Medicare mandate (3-night stay rule) requires a 3-day inpatient stay for patients discharging to skilled nursing facilities (SNFs). Studies show that 48%-64% of Medicare total joint arthroplasty (TJA) patients are safe for discharge to SNFs on postoperative day (POD) #2. The purpose of this study was to extrapolate the financial impact of the 3-night stay rule.
The American College of Surgeons National Surgical Quality Improvement Program database was queried for all primary TJAs performed in 2015. Discharge destination was recorded. Institutional cost accounting examined costs for patients discharging on POD #2 vs POD #3.
A total of 42,423 TJAs (14,395 total hip arthroplasties [THAs] and 28,028 total knee arthroplasties [TKAs]) were performed in patients over the age of 65 years. Of these patients, 5252 THAs (36.5%) and 12,022 TKAs (42.9%) were discharged from the hospital on POD #3, with 2404 THAs (16.7%) and 5083 TKAs (18.1%) being discharged to SNFs. Institutional cost accounting revealed hospital costs for THA were $2014 more, whereas hospital costs for TKA were $1814 more for a 3-day length of stay when compared with a 2-day length of stay (P< .001). The mean charge per day for an SNF was $486.
The National Surgical Quality Improvement Program database is a representative sample of all surgeries performed in the United States. Extrapolating our findings to all Medicare TJAs nationally gives an estimated $63 million in annual savings. Medicare mandated, but potentially medically unnecessary inpatient days at a higher level of care increase the total cost for TJAs. Policies regarding minimum stay requirements before discharge should be re-evaluated.