A denied, delayed, or underpaid insurance claim can be challenged, but the letter has to match the problem. If coverage or payment is wrong, send a written appeal. If the file is stuck, ask in writing for the missing step, a named contact, and a decision date. If the problem is the adjuster or claims team, write a supervisor. A state insurance department complaint is for possible rule-breaking, and it does not replace an internal appeal your policy or plan may require.

These templates are for U.S. consumers. Your policy or health-plan documents, denial notice, state rules, and product-specific procedures control the wording, deadline, and delivery method. Don't copy a date or legal phrase from a sample until you've checked those documents.

Start with the right complaint or appeal

Problem Best first step Main request
Claim denied Written appeal to the insurer Reverse the denial or explain the policy basis in detail
Claim underpaid Coverage or valuation appeal Recalculate the amount and identify disputed line items
Claim delayed Written status complaint Provide the missing step, assigned contact, and expected decision date
Adjuster acted improperly Supervisor complaint Review the conduct and reassign the claim if appropriate
Health treatment denied Internal appeal Reverse the denial or arrange an expedited review
Eligible health denial still unresolved External review Have an independent reviewer assess the denial
Possible regulatory violation State insurance department complaint Review whether the insurer followed applicable rules

A regulator complaint does not necessarily preserve an appeal, lawsuit, or policy deadline. Send the required internal appeal first unless your documents or applicable rules say otherwise.

What controls the dispute?

Start with the denial letter and the contract, not a general internet template. For auto, homeowners, renters, life, and travel insurance, check:

Health insurance adds another stack: the explanation of benefits, plan certificate or Summary Plan Description, medical-necessity reason, billing or procedure codes, and the appeal instructions on the notice. Employer-sponsored, individual, Medicare, Medicaid, and self-funded plans can use different procedures.

An adjuster's estimate or a customer-service representative's phone statement does not rewrite the policy. If someone gave you conflicting information, record the date, name, title, and exact statement, then ask the insurer to confirm its position in writing.

Gather evidence before writing

Reviewers move faster when the letter is specific and the proof is easy to find. Assemble:

  1. The denial, payment, or delay letter
  2. Your policy or plan documents
  3. A one-page timeline of the loss, claim filing, inspections, calls, and decisions
  4. Photos, videos, police or incident reports, repair estimates, invoices, and receipts
  5. Relevant emails, portal messages, letters, and call notes
  6. Independent estimates or professional opinions for technical disputes
  7. A calculation showing the amount you believe is owed
  8. The remedy you want, such as payment, reprocessing, a new inspection, or a written explanation

Keep original records and send copies. Healthcare.gov's internal appeals guidance also recommends keeping originals, submitting copies, and recording the day, time, name, and title of anyone you speak with.

Use an attachment index:

Attachment 1: Denial letter dated [date]
Attachment 2: Relevant policy pages [page numbers]
Attachment 3: Timeline of events
Attachment 4: [Estimate, medical record, report, or invoice]
Attachment 5: Prior correspondence
Attachment 6: Amount calculation

No stock phrase guarantees approval, and no sample letter has a reliable success rate. The strongest appeals connect the facts, the policy language, and the requested remedy.

How to write the letter

Most claim letters work better when they do six things:

  1. Identification: Give your name, policy number, claim number, loss date, and contact information.
  2. Decision being challenged: Quote or accurately summarize the denial, delay, or payment decision.
  3. Specific disagreement: Explain which fact, calculation, policy interpretation, or missing document is wrong.
  4. Evidence: Refer to attachments by number.
  5. Requested resolution: State exactly what you want the insurer to do.
  6. Next step: Ask for written confirmation, the final reason if the decision stays unchanged, and any further appeal route.

Don't treat an arbitrary 14-day deadline as if it were a legal requirement. Follow the deadline in the notice or policy and ask the insurer to respond within the time that procedure requires. If no response date is given, you can request written acknowledgment by a reasonable date.

18 insurance claim complaint and appeal templates

Add this contact block to any template:

[Your full name]
[Mailing address]
[Email address] | [Phone number]
[Date]

[Insurance company]
[Claims or appeals department]
[Address or portal name]

Policy number: [number]
Claim number: [number]

Replace the bracketed text, remove instructions, and attach copies of your supporting records.

1. General denied insurance claim appeal

Subject: Formal appeal of claim [number] - denial dated [date]

Dear Claims Appeals Team:

I am appealing the denial of my claim for [brief description of loss]. Your letter dated [date] states that the claim was denied because "[quote the stated reason]."

That decision should be reconsidered because [state the key facts]. The relevant policy language appears at [section and page]. It provides [brief quote or accurate summary]. The attached records support this position, including [list the most important documents].

Please reopen the claim, reconsider the denial, and [pay or approve the specific amount or service requested]. If you maintain the denial, please identify every policy provision and document relied on and provide the next available appeal or review option.

Please confirm receipt of this appeal and provide a written response under the applicable policy and procedural deadline.

Sincerely,
[Your name]

2. Auto insurance low-settlement appeal

Subject: Appeal of vehicle damage valuation for claim [number]

Dear Claims Supervisor:

I dispute the payment offer of $[amount] for the damage to my [year, make, model]. The offer does not account for [repair line items, labor hours, parts, taxes, loss of use, or other documented issue].

My repair estimate from [shop or appraiser] totals $[amount]. I have attached the estimate, photographs, and a list of the differences between your valuation and the documented repair cost.

Please provide an itemized explanation of your valuation, including any omitted damage, labor assumptions, parts decisions, and deductions. Please also review the attached estimate and issue a corrected payment of $[amount], or explain the policy-based calculation in writing.

If the policy provides an appraisal, mediation, or other valuation process, please send the instructions and deadline.

Sincerely,
[Your name]

3. Auto claim denied because of fault or causation

Subject: Request to reconsider liability or causation decision for claim [number]

Dear Claims Supervisor:

I appeal the decision dated [date] that [denied coverage or assigned fault] because [summarize the decision]. The available evidence does not support that conclusion.

Please review the attached [police report, photographs, witness statement, diagram, repair report, or other evidence]. In particular, [explain the fact the insurer overlooked or misunderstood].

Please identify the evidence and policy language supporting the decision, including any report or expert opinion on which the company relied. I request a new review of liability and causation and a written explanation of the result.

Please confirm whether any additional information is needed before the review is completed.

Sincerely,
[Your name]

4. Auto insurance claim delay or request for reassignment

Subject: Formal delay complaint and status request for claim [number]

Dear Claims Manager:

I reported the [accident or loss] on [date]. The claim was assigned to [adjuster], and my last meaningful update was on [date]. The following steps remain unresolved: [inspection, liability decision, estimate, payment, rental issue, or other item].

Please provide the current claim status, identify any information still needed from me, and give the next expected decision or inspection date. Because I have received [conflicting information or no response] from [dates], I also request supervisor review and reassignment if appropriate.

This letter is a request for prompt handling and does not waive any appeal or other rights. Please confirm receipt and respond through the method listed in my policy or claim correspondence.

Sincerely,
[Your name]

5. Homeowners claim denied after water, fire, or storm damage

Subject: Appeal of homeowners claim denial for claim [number]

Dear Claims Appeals Team:

I appeal the denial of my claim for damage that occurred on [date] after [water leak, fire, storm, or other event]. The denial letter cites [exclusion or reason].

The evidence shows [describe what happened and when]. The attached photographs, reports, invoices, and statements from [contractor, inspector, or other professional] support this account. Please review whether the cited exclusion applies to all of the claimed damage and whether any applicable endorsement or covered resulting damage was considered.

Please identify the exact policy section supporting the denial and explain how it applies to the attached evidence. I request a new inspection and reconsideration of coverage for [specific rooms, structures, or items].

Sincerely,
[Your name]

6. Homeowners underpayment or incomplete repair scope

Subject: Request to revise repair scope and payment for claim [number]

Dear Adjuster or Claims Supervisor:

The claim has been accepted in part, but the payment of $[amount] does not cover the documented repair scope. The estimate omits or understates [list rooms, materials, labor, code-related work, temporary repairs, or personal property].

Attached are my contractor's estimate for $[amount], photographs, invoices, and a line-by-line comparison. Please reinspect the property or arrange a review by an appropriate specialist.

I request an itemized response to each disputed line and a revised payment consistent with the policy and supported repair scope. If any item is excluded, please identify the specific exclusion and the facts supporting its application.

Sincerely,
[Your name]

7. Renters insurance personal-property dispute

Subject: Appeal of personal-property valuation for claim [number]

Dear Claims Representative:

I appeal the decision on my renters insurance claim for personal property damaged or stolen on [date]. The payment or denial does not account for [items or categories].

Attached are my inventory, photographs, receipts or replacement-cost research, and [police report or other supporting record]. For each disputed item, I have listed the description, purchase date if known, replacement cost, and amount paid or denied.

Please explain what additional proof is required for any item not accepted and provide the valuation method used. I request revaluation of the attached inventory and a written decision on each disputed item.

Sincerely,
[Your name]

8. Health insurance medical-necessity appeal

Subject: Internal appeal of medical-necessity denial for [service], claim [number]

Dear Appeals Coordinator:

I appeal the denial of [treatment, procedure, medication, or equipment] provided or prescribed on [date] by [provider]. The denial states that the service was not medically necessary because "[quote the reason]."

My treating clinician explains that the service is appropriate because [brief clinical explanation]. The attached records include the clinician's letter, diagnosis, treatment history, test results, and the requested service details.

Please have the appeal reviewed by an appropriately qualified reviewer and reconsider the denial using the attached evidence. I request that the claim be approved and reprocessed under the applicable benefit.

If more information is required, please identify the specific document and the submission deadline in writing.

Sincerely,
[Your name]

9. Health claim denied because of a coding or billing error

Subject: Request to correct and reprocess claim [number]

Dear Appeals or Claims Department:

I believe this claim was denied because of a coding or billing error rather than the actual coverage terms. The service was [describe service] on [date] from [provider]. The denial reason is "[quote the reason]."

My provider has reviewed the issue and supplied [corrected claim, code explanation, itemized bill, or coding statement]. The attached documents show [briefly explain the mismatch].

Please correct the claim record or coordinate with the provider to obtain the corrected submission, then reprocess the claim. Please confirm whether the insurer needs a corrected claim directly from the provider and whether any additional appeal form is required.

Sincerely,
[Your name]

10. Out-of-network emergency treatment appeal

Subject: Appeal of out-of-network emergency claim [number]

Dear Appeals Coordinator:

I appeal the processing of emergency treatment received at [facility] on [date]. The care was provided because [briefly describe the emergency and why immediate treatment was required]. The facility was [the nearest appropriate facility or the facility directed by a provider, if true].

Attached are the medical records, itemized bill, discharge information, and any documentation explaining the emergency circumstances. Please review the claim under the emergency-care and out-of-network provisions that apply to my plan.

Please explain the benefit level used, identify any missing information, and reprocess the claim if the attached evidence supports emergency treatment coverage.

Sincerely,
[Your name]

11. Request for an expedited health appeal

Subject: Request for expedited internal appeal of [service] denial

Dear Appeals Coordinator:

I request an expedited appeal of the denial of [service or treatment]. Waiting for the standard review could [seriously affect my health, prolong the condition, or interfere with the treatment plan]. My treating clinician, [name and credentials], supports this request.

Attached are the denial notice and the clinician's statement explaining the urgency, diagnosis, proposed treatment, and consequences of delay. Please tell me immediately whether the request qualifies for expedited review and the approved method for submitting any additional records.

If the request is not treated as expedited, please provide that decision and the applicable standard appeal instructions in writing.

Sincerely,
[Your name]

Healthcare.gov says an urgent internal appeal should be decided as quickly as the medical condition requires and no later than four business days after the request is received. A verbal decision must be followed by written notice within 48 hours. Eligibility and procedures can vary, so use the instructions in your plan documents.

12. Request for external health-plan review

Subject: Request for external review of final denial for claim [number]

Dear Appeals Coordinator:

I request external review of the final denial dated [date] concerning [service, treatment, or claim]. The internal appeal was submitted on [date], and the final decision states "[quote or summarize the reason]."

The denial should be reversed because [brief explanation]. The attached records include the denial notices, policy or plan provisions, medical records, clinician statement, and prior appeal.

Please confirm whether this request is eligible for external review, identify the independent review organization or submission process, and provide any deadline or required form. If the internal appeal and external review may be filed at the same time, please confirm that option in writing.

Sincerely,
[Your name]

Healthcare.gov says consumers may be able to request an internal appeal and external review at the same time. Follow the denial notice, because not every plan or type of decision uses the same route.

13. Life insurance claim payment delay

Subject: Status complaint regarding life insurance claim for [insured's name]

Dear Life Claims Department:

I submitted the claim for the death benefit under policy [number] on [date]. You received [death certificate, claim form, policy records, and other documents] on [date]. I have not received a final decision or a clear list of missing information.

Please confirm the current status, identify every document still needed, and provide the applicable processing or review timeline. If the claim is ready for payment, please arrange payment of the benefit according to the policy. If the company expects to deny or limit the claim, please provide the written policy basis and appeal instructions.

Please send the response to [address or email] and copy [authorized beneficiary or representative, if applicable].

Sincerely,
[Your name]

14. Life insurance denial or lapse dispute

Subject: Appeal of life insurance denial for policy [number]

Dear Claims Appeals Team:

I appeal the decision dated [date], which states that the policy was [lapsed, void, rescinded, or otherwise not payable] because [summarize the reason].

Please review the attached premium records, notices, application materials, policy provisions, and correspondence. The disputed facts are [explain the payment, notice, application, or policy-history issue]. I request a written explanation of how the company applied the cited provision to these records.

Please reconsider the denial and process the claim for the benefit due under the policy. If the decision remains unchanged, provide the final position, all applicable review options, and each deadline.

Sincerely,
[Your name]

15. Workers' compensation injury or benefit complaint

Subject: Written notice and request for review of workers' compensation claim [number]

Dear Claims Administrator:

I am requesting review of my workers' compensation claim for an injury or illness that occurred on [date] while I was working as [job or role]. I reported it to [person] on [date]. The unresolved issue is [claim denial, medical treatment, wage benefit, authorization, or missing claim record].

Attached are my notice, medical records, work information, witness details, and prior correspondence. Please explain the current status, the reason for any denial or delay, and what information or form is required next.

Because workers' compensation deadlines and agencies differ by state, please also identify the applicable dispute or hearing process in the written response.

Sincerely,
[Your name]

16. Complaint about adjuster conduct

Subject: Supervisor complaint about claim handling by [adjuster's name]

Dear Claims Supervisor:

I am requesting a review of how my claim has been handled. The specific issues are:

- On [date], [describe the factual event or statement].
- On [date], [describe a missed callback, conflicting explanation, or inspection issue].
- On [date], [describe the effect on the claim].

Attached are the relevant messages, letters, and call log. I am asking for a supervisor to review the file, correct any inaccurate information, and confirm the next claim-handling steps. Please consider assigning another representative if that would help resolve the communication problem.

I am documenting the conduct factually and am not asking the company to treat this letter as a legal conclusion. Please respond in writing.

Sincerely,
[Your name]

17. Complaint to a state insurance department

Subject: Consumer complaint about claim handling by [insurer], claim [number]

Dear Consumer Services Division:

I am requesting regulatory assistance with the handling of my [auto, homeowners, renters, life, or other] insurance claim. The claim was filed on [date]. The insurer [denied, delayed, underpaid, or otherwise handled] it as follows: [short factual summary].

I first contacted the insurer on [dates] and sent a written appeal or complaint on [date]. The response was [summarize the result], or no response was received.

I understand that the department may review compliance and request a response but may not decide the full value of a private claim. Please advise whether this complaint is within your jurisdiction and whether the insurer followed the applicable claims-handling requirements.

Attached are the policy pages, denial or payment letter, timeline, correspondence, and supporting evidence.

Sincerely,
[Your name]

18. Follow-up after an unanswered appeal

Subject: Follow-up and request for final written position on claim [number]

Dear Claims Appeals Team:

I submitted my appeal on [date] through [portal, email, or mail]. Delivery or receipt was confirmed on [date], but I have not received a final written response.

Please confirm the appeal status, identify any missing information, and provide the decision date required by the applicable policy or procedure. If the company has completed its review, please send the final written position, the policy provisions relied on, and any further appeal, external review, appraisal, or complaint option.

This follow-up is not a waiver of any deadline or remedy. Please preserve the claim record and communicate with me in writing.

Sincerely,
[Your name]

Health insurance deadlines and external review

Health appeals have more formal stages than many property or auto disputes. The denial notice should tell you whether the decision is an internal denial, a final internal denial, or an administrative issue; how to file an internal appeal; the deadline and required form; whether expedited review is available; whether external review is available; and where to send the request and supporting documents.

Healthcare.gov's guidance says a consumer may file an internal appeal and an external review request at the same time in some circumstances. An external reviewer can assess whether an eligible denial should stand, but the notice and plan documents determine whether that option applies.

Rules also vary by state and plan type. For example, Nebraska Department of Insurance guidance says an internal appeal must be filed within 180 days of receiving the denial notice. It also says an independent review organization provides written notice to uphold or reverse the denial within 45 days after receiving an external review request. That Nebraska guidance excludes certain grandfathered health plans from external-review requirements and says an external-review decision is binding on the claimant and insurer, subject to other remedies under the law.

Don't treat Nebraska's deadlines or effect as a rule for every state. Check the law and plan documents that apply to your coverage.

Escalation: what to do if the insurer says no

Use this order unless a deadline requires a different path:

  1. Submit the formal internal appeal. Use the insurer's form or portal if required. Attach a focused letter and copies of evidence.
  2. Ask for supervisor review. This is useful for delays, communication failures, incomplete inspections, or inconsistent explanations.
  3. Request the next review option. Depending on the product, that may be external health review, appraisal, mediation, arbitration, or a formal grievance.
  4. Contact the appropriate regulator. For most private insurance products, start with the official insurance department in the relevant state. Its website should explain whether it handles your policy and complaint type.
  5. Check plan-specific routes. Employer-sponsored health plans, government programs, and self-funded plans may use a different administrator or agency.
  6. Consider professional help for high-stakes disputes. A lawyer, licensed public adjuster, patient advocate, or other qualified professional may be useful when the amount is substantial, an exclusion is disputed, a release is requested, or a filing deadline is close.

A regulator complaint usually asks whether the insurer followed applicable rules and handled the claim properly. It may prompt a response or correction, but it may not determine the final value of your loss. Small-claims court, civil court, or a policy dispute process has separate eligibility, filing limits, and deadlines.

Don't assume that an email, phone call, regulator complaint, or settlement discussion extends a deadline to sue. If a limitation date may be approaching, verify it promptly with the policy, court rules, or a qualified professional.

Document claim-handling problems without overclaiming

"Bad faith" is a legal conclusion, and the standard differs by state. A denial or delay isn't automatically bad faith. Your first complaint is usually stronger if it records observable conduct instead of accusing the adjuster of a legal violation.

Fact to document Why it may matter
The insurer missed a promised inspection or response date Shows the timeline and possible delay
The explanation changed between letters or calls Helps identify an inconsistent position
A report, estimate, or medical record was ignored Supports a request for reconsideration
No one inspected the claimed damage May support a request for a new investigation
The adjuster gave conflicting policy information Shows why written clarification is needed
The company pressured you to sign a release Makes it important to understand what rights the document affects

Use dates, names, quotations, and attachments. Avoid claiming that an insurer broke the law unless you have verified the specific rule and facts. A regulator or court, not a template, determines whether the conduct meets a legal standard.

Common mistakes that weaken an appeal

For a disputed amount, include a short calculation:

Documented repair or benefit amount: $[amount]
Less deductible or policy adjustment: -$[amount]
Payment already received: -$[amount]
Additional amount requested: $[amount]

Frequently asked questions

Is an insurance complaint the same as an appeal?

No. An appeal challenges the decision on coverage, payment, or eligibility. A complaint may focus on delay, communication, an adjuster's conduct, or regulatory compliance. You may need both.

How long should an insurer have to respond?

There isn't one universal deadline for every U.S. claim. Use the deadline in the denial notice, policy, plan documents, or applicable state procedure. A sample letter's requested response date isn't a substitute for a legal or contractual deadline.

Can I appeal an underpaid claim?

Usually, you can ask the insurer to review the payment and explain the valuation. Include a line-by-line estimate, photographs, invoices, and policy language. Check whether the policy offers appraisal or another dispute process.

What if I never received a written denial?

Ask for the decision, reason, policy provision, evidence relied on, and appeal instructions in writing. Keep tracking the claim, and don't assume that the absence of a letter means no deadline applies.

Should I hire a lawyer?

Consider qualified help when the claim is large, an exclusion or rescission is involved, the insurer asks for a release, a serious injury or death is involved, or a filing deadline is close. For smaller disputes, compare the likely recovery with professional fees and available regulator or policy procedures.

Pull the denial or payment letter, match the problem to the table above, fill in the matching template with your claim numbers and attachments, and send it through the channel named in the notice before that notice's deadline.