A major study published in JAMA Internal Medicine has reached a conclusion that many in the skilled nursing world long suspected: Medicare’s requirement that patients spend at least three days in a hospital before their nursing home care is covered doesn’t actually improve patient outcomes. What it does do is keep people in hospital beds longer — and drive up costs for everyone involved.
The research, which analyzed more than 670,000 traditional Medicare hospitalizations, used a natural experiment created when CMS reinstated the 3-day rule on May 12, 2023 — the day after the COVID-19 public health emergency ended and a two-year pandemic waiver expired. Researchers from Brown University compared patient outcomes from just before and just after the reinstatement, allowing them to isolate the rule’s real-world effects.
The results weren’t flattering for the policy.
Longer Stays, No Better Outcomes
When the rule came back, the share of hospital stays lasting at least three days rose by 1.13 percentage points overall. Among patients who were eventually discharged to a skilled nursing facility, that figure jumped by 5.57 percentage points — meaning hospitals were clearly extending stays to help patients qualify for coverage.
Yet despite that measurable shift in behavior, the study found no significant improvements in the outcomes that actually matter. Thirty-day rehospitalization rates didn’t budge. Thirty-day mortality didn’t change. Total SNF utilization didn’t fall. And Medicare spending? Essentially unchanged.
The rule was supposed to function as a filter — ensuring that only patients with genuine short-term rehab needs get routed to skilled nursing facilities. Instead, it appears to function mainly as a bureaucratic hurdle that hospitals navigate around by keeping patients in beds a little longer, without any clinical benefit to show for it.
Who It Hits Hardest
The impact isn’t evenly distributed. The study found that patients hospitalized for hip fractures and those with dementia saw the biggest increases in extended stays — populations that are already among the most vulnerable in long-term care settings.
For them, an extra day or two in an acute care bed isn’t just inconvenient. It can mean delayed rehabilitation, heightened confusion, and the kind of disruption that sets recovery back significantly. Industry reports have long documented how the 3-day rule creates friction at the hospital-to-SNF handoff, and this study puts hard numbers behind what operators have said for years: the rule pushes hospitals to game length-of-stay rather than make clinically sound discharge decisions.
A Policy Under Renewed Scrutiny
The researchers were direct in their conclusion. Reinstating the requirement, they wrote, “was associated with longer inpatient stays without decreases in SNF utilization or improvements in short-term health outcomes.” They argue the findings “raise questions regarding the value and continued relevance of a broadly applicable 3-day inpatient stay rule in the traditional Medicare program.”
That’s a pointed challenge to a decades-old policy — and it arrives at a moment when CMS is under growing pressure to rethink how post-acute care is structured and financed. Both the Biden and Trump administrations explored 3-day rule waivers within specific alternative payment models, but a broader repeal has never gained traction in Congress.
The timing of this data matters. As CMS continues to wrestle with nursing home reimbursement pressures and the long-term sustainability of post-acute care financing, evidence that a core Medicare rule adds costs without clinical value is hard to ignore — and the industry will likely use it as fresh ammunition to push for reform.
