Claims & Costs

Why Insurance Claims Get Denied — and What You Can Do About It

Insurance Basics Editorial Team Staff Writer · Apr 13, 2026 · 5 min read
Why Insurance Claims Get Denied — and What You Can Do About It

Photo: ConfiReads.com | Blogs For Inquisitive Minds editorial

Claim denials are more common than most people expect. Understand the most frequent reasons and your options for pushing back.

Key Takeaways

  • Most claim denials stem from avoidable mistakes like missing documentation or policy misunderstandings.
  • Insurers are required to explain why a claim was denied — always request this in writing.
  • You have the right to appeal a denial, and many overturned claims start with a simple written dispute.
  • Reading your policy before you file — not after — is the single best way to avoid surprises.

Denials Are Common — and Often Preventable

Getting a claim denied feels like a gut punch, especially when you've been paying premiums faithfully and genuinely need help. But claim denials happen more than most policyholders expect, and a significant share of them trace back to errors or misunderstandings that could have been avoided before the claim was ever filed.

Understanding why insurers deny claims — and what steps you can take afterward — gives you real leverage. This article walks through the most frequent mistakes that lead to denials and what you can actually do about them. For a broader look at what your policy may or may not cover, see our guide on common misunderstandings about what insurance actually covers.

1

Filing a claim for something your policy explicitly excludes.

Why it happens: Many policyholders assume broad coverage without reading the exclusions section. Standard exclusions — like flood damage on a homeowners policy or cosmetic procedures on a health plan — surprise people at the worst moment.
How to avoid: Read your policy's exclusions before you need to file, not after. If you're unsure whether something is covered, call your insurer and ask directly — get the answer in writing if the situation is significant.
2

Missing the deadline to report a loss or submit documentation.

Why it happens: People often focus on dealing with the immediate situation — a car accident, a water leak, a health crisis — and assume they have plenty of time to notify the insurer. Most policies have strict timely-reporting requirements.
How to avoid: Report the loss to your insurer as soon as reasonably possible, even if you don't have all the details yet. Check your policy for specific notification windows and document the date and method of every communication.
3

Submitting incomplete or inconsistent documentation.

Why it happens: Claimants frequently underestimate how much documentation an insurer needs, or submit records that contradict other details in the claim — which raises red flags regardless of intent.
How to avoid: Compile all supporting materials before filing: photos, receipts, repair estimates, medical records, police reports, or whatever applies. Review everything for consistency before submission and keep copies of everything you send.
4

Not disclosing relevant information on the original policy application.

Why it happens: Applicants sometimes omit details they consider minor — a pre-existing condition, a prior claim, a home-based business — either not realizing they're relevant or hoping to keep premiums lower.
How to avoid: Insurers can deny claims — and even rescind policies — if they discover material misrepresentation at application. Answer every question on your application completely and accurately, and update your insurer when your situation changes.
5

Letting damage worsen before reporting it, then filing for the full extent.

Why it happens: Some policyholders delay reporting a smaller problem hoping it resolves itself, then file once it becomes a bigger issue. Insurers often deny or reduce claims when they determine damage could have been mitigated earlier.
How to avoid: Most policies include a duty to mitigate — meaning you're expected to take reasonable steps to prevent further damage after a covered loss. Act promptly, document what you do, and report the situation to your insurer right away.

What to Do After a Denial

A denial letter is not the final word. Under most state regulations and policy terms, you have the right to appeal — both internally through your insurer and, in many cases, externally through a state insurance department or independent review process.

Your Right to Appeal Is Real — Use It

Insurers must provide a written denial reason and information about your appeal rights. Many denials are overturned on appeal, particularly when the policyholder submits additional documentation or points out that the insurer misapplied policy language. Don't assume a denial is final without at least reviewing your appeal options.

Start by requesting a written explanation of the denial if you haven't already received one. Insurers are generally required to specify the exact reason and cite the relevant policy language. Compare their reasoning against your actual policy documents, not your memory of what you thought was covered.

Gather any supporting documentation that directly addresses the stated reason for denial — medical records, receipts, photos, contractor estimates, or correspondence. Then submit a formal written appeal that clearly responds to each point the insurer raised.

If the internal appeal fails, most states offer external review options through the state insurance commissioner's office. For a step-by-step breakdown of both processes, see our article on appealing a denied claim. And to avoid missteps the next time you file, filing a claim without making it harder on yourself is worth reading before you start the process.

~17%

Health insurance claims denied by marketplace plans

A Kaiser Family Foundation analysis found that marketplace insurers denied roughly 17% of in-network claims on average, though rates varied widely by insurer.

< 1%

Denied health claims that are formally appealed

According to Kaiser Family Foundation research, fewer than 1% of denied health insurance claims are ever appealed by consumers, despite many appeals succeeding.

This article is general insurance information and education, not personalized legal, financial, or insurance advice. Coverage terms, exclusions, and appeal rights vary by policy and state. Read your policy documents carefully and consult a licensed insurance professional for guidance specific to your situation.

Insurance Basics Editorial Team

ConfiReads.com | Blogs For Inquisitive Minds

Insurance Basics Editorial Team is the collective byline for our editorial team and contributor network. Articles published under this byline or an editorial pen name are researched, written, and reviewed according to our editorial standards for clarity, consistency, and independence before publication.

Coverage TypesPolicy EssentialsClaims & Costs
View author profile

The content on this site is for informational purposes only and is not a substitute for professional advice. Always consult a qualified professional for guidance specific to your situation.