Appeal an Insurance Claim Denial
Upload your denial letter. AI identifies coverage issues and policy violations, builds a documented appeal, and sends it by certified mail.
What this denial means
An insurance claim denial means the insurer determined your claim is not covered, not medically necessary, or did not meet plan requirements. Under the Affordable Care Act, you have the right to an internal appeal and, if denied, an external review. Most insurance denials can be appealed — and many are overturned.
Who this is for
Anyone whose health, auto, home, or other insurance claim was denied. This includes patients denied coverage for medical procedures, policyholders whose claims were rejected, and anyone who received a denial letter from an insurance company.
Common reasons for denial
- The insurer says the treatment is not medically necessary
- The service or provider is out of network
- The claim was filed too late (timely filing)
- The treatment is excluded under the plan
- Prior authorization was not obtained
- The insurer says the diagnosis is not covered
- The claim has coding or billing errors
What information matters
The most critical elements are: the specific denial reason cited by the insurer, the plan section or policy language the insurer relied on, the deadline to appeal (typically 180 days under ACA for health plans), and any supporting documentation such as medical records, letters of medical necessity from your doctor, or policy language that supports coverage.
Documents to prepare
- Your denial or explanation of benefits (EOB) letter
- Your insurance policy or plan document
- Medical records or clinical notes
- A letter of medical necessity from your provider
- Prior authorization documents (if applicable)
- Bills, receipts, or cost estimates
- Any prior correspondence with the insurer
Deadline guidance
For health insurance under the ACA, you generally have 180 days to file an internal appeal. Other insurance types (auto, home, life) may have shorter deadlines — often 30 to 60 days. The deadline is stated in your denial letter. Certified mail ensures your appeal is received and documented before the deadline.
What Appeal Mail does
Appeal Mail analyzes your denial letter with AI to identify the coverage issues, policy language, and deadline. It drafts a structured appeal that references your policy, addresses each denial reason, and includes your evidence. After you review and approve, it sends the appeal by certified mail with tracking and proof of delivery.
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Your denial letter
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AI identifies issues
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Draft + validate
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Certified mail
Build and send your appeal
Upload an insurance claim denial letter, identify coverage issues and policy violations, and build a documented appeal to your insurer. Upload the source document and let the system do the hard work while you stay in control.
Start with your document
PDF, PNG, or JPG. We analyze the actual document—no retyping required.
Frequently asked questions
How long do I have to appeal an insurance claim denial?
For health insurance plans under the Affordable Care Act, you typically have 180 days from the denial to file an internal appeal. Other insurance types may have shorter deadlines — check your denial letter for the specific timeframe.
What is the difference between an internal appeal and external review?
An internal appeal asks the insurance company to reconsider its decision. If the internal appeal is denied, you can request an external review by an independent third party. The insurer must follow the external reviewer's decision.
Do I need a lawyer to appeal an insurance denial?
Many people successfully appeal insurance denials on their own. Appeal Mail helps you build a structured, evidence-backed appeal letter. For complex cases or large claims, you may want to consult an attorney — but Appeal Mail does not provide legal representation.
Can I appeal a medical necessity denial?
Yes. Medical necessity denials are among the most common and most successfully appealed. Appeal Mail has a dedicated medical necessity appeal workflow, or you can use the general insurance claim denial workflow.
Why send my appeal by certified mail?
Certified mail provides proof that your appeal was delivered and when. This protects you if the insurer claims they never received your appeal or that it was filed late. The tracking number and delivery confirmation serve as legal proof of timely filing.
Related appeal workflows
Appeal a Medical Necessity Denial
Build a source-supported appeal around a medical necessity denial.
Appeal an Insurance Coverage Denial
Challenge a stated denial of insurance coverage with source-linked evidence.
Respond to a Claim Denial Letter
Upload any claim denial letter and turn it into a documented response.
Appeal a Dental Insurance Denial
Upload a dental denial and build the response.