What to Do When Your Insurance Claim Gets Denied

Between 10% and 17% of health insurance claims in the US are denied on initial submission — and of those that are formally appealed, more than 40% are eventually overturned [SOURCE: verify — KFF insurance denial and appeal data]. Similar patterns exist across home and auto insurance. The majority of people who receive a denial accept it as final. It is almost never final unless you decide it is.

This guide covers what to do when your insurance claim is denied — why denials happen, the step-by-step appeal process, what documentation produces the strongest case, and how to escalate beyond the insurer when internal appeals fail. The tone here is advocacy, not complaint: you have more options than you probably know, and the process is more navigable than the denial letter suggests.

Disclaimer: This article is for informational purposes only and does not constitute legal or financial advice. Insurance laws, appeal processes, and consumer protections vary significantly by country, state, and policy type. Consult a qualified professional for advice specific to your situation.

Why Claims Get Denied — And What Each Denial Type Means

What most people do not know is that insurance companies expect a significant percentage of denials to go unchallenged. The initial denial is not necessarily the company's final position — it is often an automated first response that requires human review only if challenged. This does not mean denials are issued in bad faith, but it does mean that the process is designed with the assumption that many claimants will not pursue an appeal.

Step-by-Step: How to Appeal a Denied Insurance Claim

Step 1: Read the denial letter in full. The denial letter must specify the reason for denial and (in most English-speaking jurisdictions) the process for appealing. The specific language of the denial determines which evidence and which arguments are most relevant. Do not skip this step.

Step 2: Gather your documentation. Compile every relevant document before submitting an appeal: the original claim, the denial letter, your policy document (read the specific section cited in the denial), any pre-authorisation you obtained, all correspondence with the insurer, and (for health claims) the treating physician's notes, medical records, and clinical guidelines supporting the treatment. The appeal tactic that works most reliably is a paper trail that makes the reviewer's decision to overturn straightforward.

Step 3: Submit a formal written internal appeal. This is a letter — not a phone call — addressed to the insurer's appeals department, referencing the claim number and denial reason, presenting the specific evidence that contradicts the basis for denial, and requesting a decision in writing within the timeframe specified in your jurisdiction.

Step 4: Request an external review if internal appeal fails. In the US, most insurance policies (and all ACA-compliant health plans) entitle policyholders to an independent external review by a body not affiliated with the insurer. In the UK, the Financial Ombudsman Service handles insurance complaints after internal resolution has been exhausted — free for consumers, binding on the insurer. In Australia, the Australian Financial Complaints Authority (AFCA) provides equivalent function. In Canada, OmbudService for Life and Health Insurance (OLHI) and general insurance ombudsman services exist at provincial level.

Step 5: If the claim is significant, consult a professional. Public adjusters (for home and property claims in the US and Australia) are licensed professionals who assess claims independently of the insurer and can identify underpayment or incorrect denial. Insurance lawyers handle cases where the amount warrants legal action. The instinct to escalate immediately to a lawyer is usually wrong for smaller claims — most denials are resolved at the internal appeal stage with good documentation, and legal involvement can complicate straightforward cases.

Health Insurance Claims — Specific Considerations

For health insurance denials specifically, the physician's role in the appeal is critical. A denial on medical necessity grounds is most effectively challenged with a peer-to-peer review — a direct conversation between your treating physician and the insurer's medical reviewer. Ask your doctor to request this explicitly in the appeal letter. Studies suggest peer-to-peer reviews overturn medical necessity denials at substantially higher rates than written appeals alone [SOURCE: verify — peer-to-peer review overturn rate data].

Hypothetical example: Fatima's health insurer denies coverage for a specialist procedure on medical necessity grounds. Her physician writes a detailed letter citing three clinical guidelines supporting the procedure's necessity for her specific diagnosis. She submits a formal written appeal attaching the letter and the relevant guideline excerpts. The internal appeal is reviewed by a medical professional at the insurer. The denial is overturned within 14 days.

Home and Property Claims — Specific Considerations

For home and property claim denials, the most commonly disputed issue is the cause of loss classification. Water damage from a burst pipe may be covered; flooding from an external source may not be. The boundary between these categories is frequently contested and often worth challenging with an independent assessment.

Hypothetical example: James's home insurer denies his claim for water damage, classifying it as flooding (excluded) rather than a plumbing failure (covered). He hires a licensed plumber to provide a written assessment confirming the water entered through a failed internal pipe, not from external flooding. He submits this with a formal appeal. The insurer reverses the classification and pays the claim.

Preventing Future Denials

The most effective prevention tactic for health insurance: call your insurer before any significant procedure or specialist referral to confirm coverage and pre-authorisation requirements. Get confirmation in writing (email or reference number). A pre-authorisation number does not guarantee payment but creates a strong record that coverage was confirmed and makes denial significantly harder to sustain.

For home and property insurance: document your property's contents and condition with a dated video walkthrough stored in the cloud annually. Make claims promptly — delayed notification is a legitimate basis for denial in most policies. Read the exclusions section when purchasing, not after a denial.

Key Takeaways

• A denial is not final — 40%+ of appealed health insurance denials are overturned, and similar patterns exist in home and auto insurance
• Read the denial reason carefully — it determines exactly what evidence is needed for the appeal
• Submit formal written appeals with comprehensive documentation; phone calls do not create the paper trail that protects you in further escalation
• External review bodies (Financial Ombudsman in UK, AFCA in Australia, state-level review in US) provide a free escalation path after internal appeals are exhausted
• For health claims, ask your physician to request a peer-to-peer review with the insurer — this overturn rate is significantly higher than written appeals alone

Frequently Asked Questions

How long do I have to appeal a denied claim?

Appeal deadlines vary by jurisdiction and policy type. In the US, ACA-compliant health plans typically allow 180 days for internal appeal. In the UK, the Financial Ombudsman requires that the complaint be raised with the insurer first and allows ombudsman referral within 6 months of the insurer's final response. Always check your policy and jurisdiction-specific rules immediately on receiving a denial — missing the appeal window forfeits your options.

Do I need a lawyer to appeal an insurance denial?

For most denials, no. Internal appeals and external ombudsman/review processes are designed for consumers to navigate without legal representation. A lawyer becomes valuable when: the claim amount is substantial, the insurer has acted in bad faith (not just made an incorrect decision), or the dispute has reached litigation. For a $5,000 health claim or a $15,000 home claim, a well-documented internal appeal is the appropriate first response — not immediate legal escalation.

What is a public adjuster and when should I use one?

A public adjuster is a licensed professional who assesses property damage claims on behalf of policyholders — independently from the insurer's adjuster. They are most useful for large or complex property damage claims where the insurer's damage assessment seems low. They typically charge 10–15% of the final claim settlement. For small claims, their fee may exceed their added value; for large claims they frequently recover significantly more than their cost.

What if my insurer does not respond to my appeal?

Most jurisdictions require insurers to respond to formal appeals within a specific timeframe — typically 30–60 days. Document all submissions and follow-up communications with dates. If the insurer does not respond within the required period, escalate immediately to the relevant regulatory body or ombudsman in your jurisdiction. Failure to respond within statutory timeframes is itself a compliance issue for the insurer.

Can I resubmit a claim that was denied more than once?

After internal appeals are exhausted, the pathway is external review rather than resubmission. In most systems, once internal appeals are concluded the insurer's position is fixed and only external review or legal action can reverse it. The exception is if new evidence emerges after the denial that was not available at the time of original submission — this can sometimes justify a fresh submission rather than a formal appeal.