Insurance companies deny claims for a fairly short list of reasons: the loss falls under a policy exclusion, the premium wasn’t paid, the application contained inaccurate information, the paperwork is incomplete, the treatment wasn’t considered medically necessary, the claim was filed too late, the policyholder didn’t meet a condition the policy requires after a loss, or the insurer suspects fraud. Understanding why insurance would deny a claim matters because most of these reasons are either preventable up front or reversible on appeal. Studies show more than half of denials are overturned when policyholders challenge them, yet fewer than one percent of people who receive a denied health insurance claim actually appeal.
The Loss Falls Under a Policy Exclusion
Every policy carves out situations it will not cover, and those exclusions are the single most common reason a claim gets denied. Homeowners insurance is the classic example. Standard policies exclude flood and earthquake damage entirely. A storm surge in your basement or a tremor that cracks your foundation is not something your homeowners policy will pay for. Flood coverage requires a separate policy, typically through the National Flood Insurance Program, and earthquake protection requires its own policy or endorsement, usually with a percentage-based deductible instead of a flat dollar amount.
Auto policies exclude mechanical breakdowns and normal wear. An engine failing at 150,000 miles is a maintenance problem, not an insurable loss. Health plans exclude elective cosmetic procedures and treatments the insurer classifies as experimental. Life insurance policies typically list specific exclusions such as death during certain high-risk activities like skydiving, and most include a suicide clause covering the first two years of the policy.
These exclusions are not oversights. Insurers price standard policies around ordinary risks and deliberately push catastrophic or predictable losses into separate products. If your denial letter cites an exclusion, read the policy language carefully, because insurers sometimes apply an exclusion more broadly than the wording actually allows.
Your Premium Payment Lapsed
If premiums go unpaid, coverage eventually ends, and any claim dated after that lapse gets denied. Grace periods vary by policy type.
Life insurance typically offers a 30- or 31-day grace period after a missed payment. Health insurance through the ACA marketplace gives a much longer runway to enrollees who receive a premium tax credit: a full three-month grace period before the insurer can terminate coverage.1HealthCare.gov. Premium Payments, Grace Periods, and Losing Coverage Without a tax credit, the grace period defaults to whatever your state requires, generally 30 or 31 days.2Health Reform Beyond the Basics. Premium Payments and Grace Periods Auto and homeowners policies typically fall in that same 30-day range.
Reinstatement is sometimes possible, but it usually means paying all missed premiums and, for life or health coverage, proving you are still insurable. That can mean a new medical exam. Wait too long and you may end up buying a new policy at a higher rate.
Something on Your Application Was Wrong
Material misrepresentation is inaccurate information on your application that would have changed the insurer’s decision to issue the policy or the premium it charged.3National Association of Insurance Commissioners. Material Misrepresentations in Insurance Litigation It covers everything from failing to disclose a pre-existing medical condition to leaving a teenage driver off an auto policy.
Insurers often catch these discrepancies only after a claim is filed. A life insurer that discovers the policyholder concealed a smoking history and then died of lung cancer can deny the death benefit on the argument that it would have issued different terms or declined coverage. The standard remedy is rescission: the insurer voids the policy as though it never existed.4FindLaw. Misrepresentations and Concealments in the Application for Insurance
Life insurance has a contestability period, usually the first two years, during which the insurer can investigate the application and deny claims based on discrepancies.5U.S. News. Life Insurance Contestability Period After that window closes, the insurer’s ability to challenge the application narrows sharply, though outright fraud can still void a policy.
The Paperwork Was Incomplete
Documentation problems are where a lot of otherwise valid claims fall apart. Insurers need evidence that the loss happened, that the policy covers it, and that the amount claimed is accurate. Missing any piece of that gives them a basis to deny.
Property claims require proof of ownership, photographs of damage, and repair estimates. Auto claims typically need a police report, repair estimates, and medical records when injuries are involved. Inconsistencies between those documents raise red flags. Health claims rely on proper coding and provider documentation. At minimum you need an itemized bill showing the date of service, a description of each service, and the billing code for each.6National Association of Insurance Commissioners. Health Care Bills: Filing Health Insurance Claims A missing physician statement or incomplete test results can trigger a denial even when the treatment itself was entirely legitimate. Disability claims are more paperwork-heavy still, requiring employer statements and detailed medical evaluations proving you cannot work.
The Insurer Says the Treatment Wasn’t Medically Necessary
Health insurers deny claims when they conclude a treatment was elective, experimental, or something that could have been handled with a cheaper alternative. Insurers apply standardized clinical guidelines to make that call, and their conclusion does not always match your doctor’s judgment.
These denials are among the most frequently appealed and overturned. Your doctor can submit additional records, letters of medical justification, and clinical evidence supporting why the treatment was appropriate for your diagnosis. Federal law requires health plans to offer both internal appeals and, if the internal appeal fails, an external review by an independent organization for any denial involving medical judgment.7HealthCare.gov. External Review Getting pre-authorization before a procedure is the single best way to avoid this type of denial. Skipping that step when your plan requires it is practically an invitation for rejection.
You Filed Too Late, or the Insurer Is Stalling
Every policy sets a window for filing claims. Auto and homeowners policies often require reporting an incident within days or weeks. Health claims may allow several months to a year. Life insurance generally allows more time.
Insurers justify strict deadlines by pointing out that late-reported claims are harder to investigate. Evidence deteriorates, memories fade, and the opportunity for fraud increases. Some deadline-based denials can be appealed if extraordinary circumstances prevented timely filing, such as hospitalization or a natural disaster, but insurers are not obligated to make exceptions unless the policy language provides for them.
Deadlines cut both ways. Nearly every state has a prompt payment law requiring insurers to acknowledge a claim and issue a coverage decision within a set timeframe, commonly 30, 45, or 60 days. An insurer that drags its feet beyond that may owe interest on the delayed payment or face regulatory fines. One exception matters: self-insured employer plans are governed by federal law and generally are not subject to state prompt payment rules.
You Didn’t Meet a Condition the Policy Requires After a Loss
Policies come with obligations that kick in after a loss occurs. Ignoring them can sink an otherwise valid claim.
The most common is the duty to mitigate. If a pipe bursts, you are expected to shut off the water and take reasonable steps to dry the property. If a fire opens part of your roof, you need to cover it to keep rain and debris out. Letting damage worsen while waiting for the insurer to pay does not work. Most policies explicitly cover the reasonable cost of these emergency measures.
Cooperation clauses are another trip wire. Nearly every liability policy requires you to promptly forward legal documents, authorize access to relevant records, and assist with the investigation or settlement of any claim. Refusing an inspection of damaged property, dodging an examination under oath, or going silent during the claims process gives the insurer grounds to deny. Health insurance adds its own compliance layer: many plans require pre-authorization before certain procedures, and treatment without it can be denied even when the procedure was medically appropriate.
The Claim Triggered a Fraud Review
When an insurer suspects fraud, the whole process stalls. Fraud teams look for patterns: damage that does not match the reported incident, repair estimates from the same shop showing up on unrelated claims, medical treatment that began suspiciously close to a policy’s effective date, or a history of frequent claims.
Legitimate claims sometimes get pulled into these reviews. Expect requests for extensive documentation, recorded statements, and possibly surveillance. Insurers are not required to disclose that they suspect fraud while the investigation is open, so unexplained delays are sometimes the first sign. Cooperate with reasonable requests, but keep detailed records of every interaction. If the investigation drags on without resolution, or the insurer denies based on vague fraud allegations without pointing to specific evidence, that may cross into bad faith.
When a Denial Might Be Bad Faith
Not every denial is legitimate. Almost every state has adopted some version of the Unfair Claims Settlement Practices Act, which sets minimum standards for how insurers must handle claims. Violations include failing to acknowledge claims promptly, refusing to pay without a reasonable investigation, not attempting a fair settlement when liability is clear, and forcing policyholders into litigation by offering far less than a claim is worth.8National Association of Insurance Commissioners. Unfair Claims Settlement Practices Act – Model Law 900
Bad faith looks different from an honest disagreement over coverage. Watch for these patterns: the insurer ignores your communications for weeks, denies a claim without explaining which policy provision applies, demands documents unrelated to the claim as a stalling tactic, or reverses a previous coverage decision without new information. An insurer that denies a claim must provide a written explanation of the specific reasons. Vague responses, or no response at all, are worth escalating.
Policyholders who successfully prove bad faith can recover the original claim amount plus additional damages for financial losses caused by the delay, emotional distress, attorney fees, and in egregious cases, punitive damages. Whether you can bring a private lawsuit under your state’s unfair claims statute or need to pursue a common-law bad faith claim depends on where you live.
How to Appeal a Denied Claim
A denial is not the end of the road. Insurers count on most people giving up, and the numbers back that up. Fewer than one percent of health insurance denials get appealed, yet more than half of appeals succeed.
Start with the Denial Letter
Your insurer must tell you in writing why the claim was denied. For employer-sponsored health plans governed by federal benefits law, the plan must provide adequate written notice, including the specific reasons, in language you can understand.9Office of the Law Revision Counsel. United States Code Title 29 – Section 1133 Read that letter carefully. The reason drives your strategy. A documentation problem calls for gathering paperwork. A medical necessity denial calls for your doctor’s involvement. A policy exclusion may require a closer reading of the actual policy language.
File an Internal Appeal
For health insurance, you have 180 days from the date you receive the denial notice to file an internal appeal. Submit any evidence that supports your claim: a letter from your doctor explaining medical necessity, corrected billing codes, test results that were missing from the original submission. The insurer must complete its review within 30 days for services not yet received and 60 days for services already provided. For urgent care situations, the decision must come within four business days.10HealthCare.gov. Internal Appeals Auto, home, and life insurance appeals follow the procedures outlined in your policy, which vary by insurer and state.
Request an External Review
If the internal appeal fails on a health insurance claim, federal law gives you the right to an external review by an independent organization with no ties to your insurer.11Office of the Law Revision Counsel. United States Code Title 42 – 300gg-19 Appeals Process External reviews are available for any denial involving medical judgment, any determination that a treatment is experimental, and cancellations based on alleged misrepresentation. If the external reviewer sides with you, the insurer must pay. Your state’s insurance department typically administers this process, and you can submit new evidence that was not part of the original claim.
File a Complaint or Get Legal Help
Your state insurance department can investigate complaints about claim handling, and filing one sometimes accelerates a stalled claim even without formal legal action. For employer-sponsored plans, the Department of Labor handles complaints related to federal benefits law.12U.S. Department of Labor. Filing a Claim for Your Health Benefits Keep records of every call, letter, and email, including names, dates, and what was said.13National Association of Insurance Commissioners. How to Appeal Denied Claims If the amount at stake is significant and you suspect bad faith, an attorney who handles insurance disputes is worth the conversation. Many work on contingency, meaning you pay nothing unless they recover money for you.