Our Take
Reversals on appeal at scale suggest denials are a friction tactic, not a clinical judgment—and appeal rates tell you how many patients never push back.
Why it matters
If denials are routinely overturned, the first 'no' functions as a barrier to care for patients too sick, confused, or resource-poor to fight back. This matters now because CMS trustees are watching prior authorization failures in Medicare Advantage plans.
Do this week
Patient advocates and compliance teams: audit your plan's appeal reversal rate this quarter and compare it to industry peers so you can identify whether denials reflect actual policy or delay-as-default.
The denial-then-reversal pattern
STAT reporters Casey Ross and Bob Herman have documented a pattern in which major Medicare Advantage insurers deny claims at the first submission, only to reverse those denials when patients or their clinicians appeal. The reporting builds on their earlier work showing how these plans use artificial intelligence to override physician judgment and block coverage for seriously ill and disabled beneficiaries.
The trustees report cited in the reporting flagged prior authorization denials as a significant issue in Medicare Advantage plans. STAT+ subscribers have access to the full analysis of how often reversals occur and which plans show the highest rates.
What reversals reveal about denial logic
A denial that is later overturned on appeal is not a medical judgment corrected upon closer inspection. It is a barrier that worked on some patients and failed on others. If a plan denies care on first submission and approves it on appeal at high rates, the first denial was not based on coverage rules or clinical criteria. It was a friction point.
The distinction matters because it tells you whether denials protect the plan from unnecessary spending (defensible) or whether they protect the plan from rapid spending (questionable). Patients who appeal tend to be those with resources, family support, or enough remaining energy to fight. Patients who accept the first denial may be those too ill, cognitively impaired, or socially isolated to challenge it. Appeal reversal rates are therefore a proxy for how many patients received delayed or foregone care because they did not push back.
This pattern is especially acute in Medicare Advantage because the population is older and disabled. Beneficiaries in these plans are less likely than commercial populations to have advocates on speed dial or to persist through administrative friction. A denial that gets reversed on appeal is not a win. It is a missed opportunity to deliver timely care.
What to do with this finding
If you oversee a Medicare Advantage plan, a health system contracting with one, or a patient advocacy organization: obtain your appeal reversal rates by service category and denial reason. Compare them to public reporting or peer benchmarks. High reversal rates on specific service lines or diagnoses are red flags that initial denials are not clinical judgments.
For compliance and medical management teams, this also invites a hard question about whether AI-assisted denial systems are being tuned for revenue protection rather than medical necessity. If the appeal process consistently finds that initial denials were wrong, the system is not working as intended.