Coverage denials, claim rejections, authorization refusals, in-network disputes — insurers deny legitimate claims millions of times every year. Most people accept the denial. The ones who appeal — win far more often than they expect.
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Under the Affordable Care Act and ERISA, every adverse benefit determination is appealable. Your insurer must provide a written explanation of the denial, the clinical criteria applied, and your full appeal rights — including the right to external independent review. Most people never know they have these rights until someone tells them.
These are the most searched and most successfully appealed health insurance denials. Each one has clear legal and clinical grounds to challenge.
Why it overturns: CO-50 denials are based on automated clinical criteria reviews that frequently miss the full picture of your medical history. The insurer's reviewer never spoke with your physician. They applied proprietary guidelines — from companies like Milliman or InterQual — that may differ from the standards your physician follows. The most effective appeals cite the specific clinical criteria the reviewer applied and demonstrate, with your physician's documentation, how your case meets or exceeds those criteria. Cases where the insurer's stated reason is directly contradicted by the clinical record — for example, claiming conservative treatment was not attempted when your records show it was — are among the strongest appeal cases ClaimCompass handles.
Why it overturns: The No Surprises Act, effective January 1, 2022, prohibits balance billing for emergency services at any facility and for out-of-network providers at in-network facilities who treated you without your knowledge or consent — including anesthesiologists, radiologists, and assistant surgeons. If any of these situations apply, the insurer cannot charge you more than your in-network cost-sharing, regardless of the provider's network status. Most people who receive surprise bills never know this federal protection exists. An appeal citing the No Surprises Act and the specific circumstances of your care has strong grounds in most situations.
Why it overturns: Prior authorization denials are based on clinical reviewers who never examined you and frequently applied criteria designed to minimize cost rather than reflect your clinical picture. The most powerful tool in a PA appeal is the peer-to-peer review — a direct conversation between your physician and the insurer's medical reviewer. Many PA denials are reversed during peer-to-peer before a formal written appeal is even filed. Request it immediately. If peer-to-peer does not resolve the denial, a formal written appeal citing your clinical history, the FDA-approved indications for the procedure, and the specific clinical criteria your insurer applied is the next step.
From denial letter to appeal-ready in about 3 minutes. No insurance expertise required.
Take a photo or upload a PDF — that's really all it takes.
Your Explanation of Benefits, denial letter, prior authorization rejection, claim summary — if it is official, confusing, and represents money you believe you shouldn't owe, ClaimCompass can read it. Your document is handled securely, encrypted in transit, and automatically deleted if you do not continue. No account needed to start.
Within seconds — your denial decoded, your rights identified.
Our AI identifies the specific denial code applied, the clinical or administrative error it represents, and whether federal law — the ACA, No Surprises Act, ERISA, or Mental Health Parity Act — supports your appeal. You receive a viability score from 0 to 100, a plain-English explanation of exactly what went wrong, and your recommended next steps. This analysis is completely free — no payment, no sign-up required.
Clinically cited, legally grounded, ready to send — for $49.
ClaimCompass generates a complete, formal appeal letter citing the specific clinical criteria your insurer applied, the evidence from your medical record that contradicts their determination, and the federal or state law that supports your appeal. Your Level 1 appeal, Level 2 escalation letter, and external independent review request are all included in your single $49 payment. No subscription. No additional charge if the denial is upheld and you need to escalate.
A score above 70 means you have a solid case worth pursuing. A score of 90 or higher — which we see frequently in cases where the insurer's stated reason is directly contradicted by your clinical record — means the denial has a real error that a reviewer must address. In those cases, fighting back isn't just possible. It's likely to work.
Upload your health insurance denial. In under a minute, you'll know exactly where you stand — and whether federal law is on your side.
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