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A new federal watchdog report has raised concerns about how some of the nation's largest Medicare Advantage insurers handle requests for post hospital care. According to findings from the U.S. Department of Health and Human Services Office of Inspector General (OIG), several major insurance providers denied a significant percentage of requests for long term care hospitals and inpatient rehabilitation facilities after patients were discharged from hospitals.
The report focused on prior authorization decisions, which are approvals that insurers require before covering certain healthcare services. While the review did not conclude that the denials were inappropriate, it highlighted substantial differences between insurance companies and suggested that some patients may experience unnecessary delays in receiving essential care.
The Office of Inspector General evaluated prior authorization decisions made by the 19 largest Medicare Advantage organizations during June 2024. The investigation focused on two important types of post acute care:
Researchers found that denial rates varied considerably among insurers, prompting recommendations for further oversight.
According to the report, Medicare Advantage plans denied:
Among the largest insurers, denial rates were even higher for long term care hospital admissions.
For rehabilitation facility requests, the denial rates were:
Together, these companies provide Medicare Advantage coverage to nearly 20 million Americans, making the findings particularly significant.
One notable finding was that many denials were reversed after patients or healthcare providers filed appeals.
The report found that:
These reversal rates may suggest that some patients initially faced barriers to medically necessary care. However, investigators emphasized that the available data alone could not determine whether the original denials violated Medicare coverage rules.
Post acute care plays a critical role in helping patients recover after serious illness or injury.
Long term care hospitals typically serve patients who require:
Inpatient rehabilitation facilities help patients regain independence after:
Delays in transferring patients to these specialized facilities can extend hospital stays and may increase the risk of complications.
The Office of Inspector General noted that patients often remain in acute care hospitals while waiting for appeal decisions. These delays commonly last five to six days, although some cases take longer.
Extended hospital stays may increase the risk of:
Because of these risks, timely authorization decisions are considered an important part of patient care.
The report found that for profit Medicare Advantage plans generally denied post hospital care requests at higher rates than nonprofit organizations.
Although investigators did not conclude that financial incentives directly caused the differences, they stated that the pattern warrants additional review and oversight.
The report also highlighted considerable variation among insurers, suggesting that company policies and internal review processes may influence authorization outcomes.
The Office of Inspector General recommended that the Centers for Medicare & Medicaid Services (CMS):
CMS neither agreed nor disagreed with these recommendations but acknowledged the report.
Patients enrolled in Medicare Advantage plans should understand that prior authorization may be required before transferring to rehabilitation centers or long term care hospitals.
If a request is denied, beneficiaries have the right to appeal the decision. The report's findings show that many appeals are successful, making it important for patients and healthcare providers to pursue the appeals process when medically appropriate.
Patients should also discuss discharge plans with their physicians and hospital care teams to better understand available options and insurance requirements.
The latest federal review has drawn attention to significant differences in how Medicare Advantage insurers approve or deny post hospital care. Although the report does not conclude that insurers acted improperly, the high denial rates and frequent reversals on appeal suggest that further examination is needed.
As Medicare Advantage enrollment continues to grow across the United States, ensuring timely access to medically necessary rehabilitation and long term care services remains an important issue for patients, healthcare providers, and policymakers alike.
U.S. Department of Health and Human Services, Office of Inspector General (OIG). "Review of Prior Authorization Denials for Medicare Advantage Post Acute Care Services," published June 8, 2026.
This article is intended for informational and educational purposes only. It does not provide medical, legal, or insurance advice. Individual healthcare needs and insurance coverage decisions vary. Patients should consult their healthcare provider, Medicare representative, or insurance plan for guidance regarding specific medical treatments or coverage decisions.