Medicare Advantage Insurers Face Scrutiny Over High Rates of Post-Hospital Care Denials

Federal Report Highlights Significant Differences in Prior Authorization Decisions

Patients enrolled in Medicare Advantage plans may face challenges when seeking approval for specialized care after leaving the hospital, according to a recent federal review. A report released by the U.S. Department of Health and Human Services Office of Inspector General (OIG) found that some of the nation's largest Medicare Advantage insurers denied post-acute care requests at notably high rates.

The findings have renewed discussions about the role of prior authorization, patient access to medically necessary treatment, and the need for greater transparency across health insurance providers.

Understanding Post-Hospital Care

Many patients recovering from serious illnesses or injuries require additional medical support after being discharged from an acute care hospital. Depending on their condition, healthcare professionals may recommend one of two primary types of facilities.

Long-Term Care Hospitals

Long-term care hospitals (LTCHs) provide extended hospital-level treatment for patients with complex medical needs. These facilities often care for individuals who require ventilator support, advanced wound management, or ongoing intensive medical supervision over several weeks.

Inpatient Rehabilitation Facilities

Rehabilitation hospitals focus on helping patients regain strength and independence through intensive therapy. Individuals recovering from strokes, spinal cord injuries, traumatic injuries, or major orthopedic procedures commonly receive treatment in these facilities.

Both forms of care play an important role in helping patients recover safely while reducing the risk of complications.

What the Federal Investigation Found

The Office of Inspector General reviewed prior authorization decisions from the 19 largest Medicare Advantage organizations during June 2024.

The report found that:

• Approximately 65% of initial requests for admission to long-term care hospitals were denied.
• Around 54% of requests for inpatient rehabilitation facilities were denied during the initial review.

Among the largest Medicare Advantage providers, denial rates were even higher.

According to the report:

• CVS Health (Aetna) denied approximately 80% of long-term care hospital requests.
• Humana denied about 72%.
• UnitedHealth Group denied roughly 71%.

For inpatient rehabilitation requests:

• UnitedHealth Group denied about 66%.
• Humana denied approximately 54%.
• CVS Health denied around 51%.

These statistics represent initial authorization decisions and do not necessarily indicate whether the requested care was ultimately approved.

Appeals Often Lead to Reversed Decisions

One of the most notable findings from the report involved the appeals process.

When patients or healthcare providers challenged an initial denial, insurers frequently reversed their decisions.

The OIG found that:

• About 36% of denied long-term care hospital requests were later approved on appeal.
• Approximately 43% of rehabilitation facility denials were overturned.

These reversal rates suggest that some patients eventually received coverage after additional review. However, appeals can delay treatment and create uncertainty for patients and their families.

Why Delays Matter

Waiting for authorization decisions can have meaningful consequences.

Patients often remain in acute care hospitals while appeals are being processed. According to the OIG, these delays commonly last five to six days and may extend even longer.

Extended hospital stays may increase the risk of:

• Hospital-acquired infections
• Falls and mobility complications
• Emotional stress for patients and caregivers
• Higher healthcare costs

Timely transitions into the appropriate level of care are generally considered an important part of recovery planning.

Financial Incentives Raise Questions

The report also noted that for-profit Medicare Advantage organizations generally reported higher denial rates than nonprofit plans.

Although investigators did not conclude that denials were inappropriate, they stated that the variation among insurers deserves closer examination. Significant differences between companies may indicate inconsistent decision-making practices or differences in how medical necessity is evaluated.

The OIG emphasized that additional oversight and data collection could help determine why these variations exist.

Recommendations for Medicare Oversight

To improve transparency, the Office of Inspector General recommended that the Centers for Medicare & Medicaid Services (CMS):

• Collect more detailed prior authorization data.
• Analyze differences in denial rates among Medicare Advantage plans.
• Better understand whether current authorization practices affect patient access to medically necessary care.

According to the report, CMS neither agreed nor disagreed with these recommendations.

What Medicare Advantage Members Should Know

Patients enrolled in Medicare Advantage plans should understand that prior authorization remains a common requirement for many healthcare services.

If coverage is denied, beneficiaries may have the right to:

• Request additional information regarding the denial.
• Work with their healthcare provider to submit supporting medical documentation.
• File an appeal within the required timeframe.
• Seek assistance through Medicare resources or patient advocacy organizations if needed.

Understanding the appeals process may help patients obtain coverage when medically appropriate.

The Bigger Picture

Prior authorization is intended to ensure that treatments meet established medical guidelines while helping control healthcare spending. However, critics argue that lengthy approval processes and inconsistent decisions can delay necessary care.

The latest federal findings do not conclude that insurers acted improperly, but they highlight substantial differences in authorization practices that could affect patient experiences across Medicare Advantage plans.

As policymakers continue evaluating prior authorization policies, future reforms may focus on improving consistency, reducing unnecessary delays, and ensuring beneficiaries receive timely access to recommended post-hospital care.

Conclusion

The Office of Inspector General's review has drawn attention to wide variations in prior authorization decisions among major Medicare Advantage insurers. While appeals frequently resulted in overturned denials, the report raises important questions about consistency, transparency, and patient access to medically necessary post-acute care.

Continued oversight and additional data collection may help healthcare officials determine whether changes are needed to better protect Medicare beneficiaries and streamline access to recovery services.

Source

U.S. Department of Health and Human Services, Office of Inspector General. Review of Prior Authorization Denials for Post-Acute Care in Medicare Advantage Plans. Published June 2026.

Disclaimer

This article is intended for informational and educational purposes only. It does not constitute medical, insurance, or legal advice. Healthcare coverage decisions vary based on individual insurance plans, medical necessity, and applicable regulations. Patients should consult their healthcare providers, Medicare representatives, or insurance companies for guidance regarding their specific circumstances.