Research reviewed August 6, 2026. Buying a pet-insurance policy is only the beginning. When a giant-breed dog needs care, the owner must submit a complete claim, respond to requests for records, read the insurer’s decision, and sometimes challenge a denial. Each stage has its own documents, deadlines, and possible delays.

This guide explains the general process in plain language. It is educational information, not individualized insurance, legal, financial, or veterinary advice. Procedures and deadlines vary by insurer, state, policy form, and claim. The policy and written notices issued to you control.

Quick reference

Stage	What generally happens	What to keep	Common problem
Claim submission	The owner or veterinary hospital sends the required invoice, proof of payment, claim information, and supporting records.	Itemized invoice, receipt, claim confirmation, and submitted files.	Missing records, an unreadable invoice, or incomplete treatment details.
Claim review	The insurer compares the treatment and medical history with the policy’s coverage, exclusions, waiting periods, deductible, and limits.	Requests for information and every record supplied in response.	The review pauses while the insurer waits for records from an owner or clinic.
Decision	The insurer pays, partially pays, or denies the claim and should explain how the policy was applied.	Explanation of benefits, denial letter, calculations, and cited policy language.	Assuming a partial payment is correct without checking excluded charges and calculations.
Internal appeal	The owner asks the insurer to reconsider, usually with a written explanation and additional evidence.	Appeal instructions, deadline, submission proof, veterinary letter, and medical evidence.	Missing a policy-specific deadline or arguing only from fairness instead of the contract and records.
Regulatory complaint	If the dispute remains unresolved, the owner may ask the state insurance department to review the insurer’s conduct.	Policy, claim file, correspondence, timeline, appeal result, and desired resolution.	Treating a complaint as a substitute for first following the insurer’s appeal process.

A complete claim starts with the invoice

An itemized invoice should identify the veterinary hospital, patient, services, dates, and charges. Insurers may also require proof that the bill was paid, medical notes, diagnostic results, or a claim form. Pets Best, for example, says an online claim submission needs an itemized invoice showing the hospital, the pet’s name, the total cost of services, and proof of payment.

Save the original documents before uploading them. Keep the confirmation number or screenshot showing that the insurer received the claim. If a veterinary hospital sends records separately, ask when and where they were sent.

Processing time begins with a usable file

An advertised claim-processing estimate may not begin until the insurer has enough information to review the claim. A missing chart, illegible invoice, or unanswered question can extend the process. That does not automatically mean the insurer acted improperly, but the owner should ask exactly what remains outstanding and who is expected to supply it.

Keep a simple log with the claim number, date submitted, requested documents, dates sent, representative names, and promised follow-up dates. Written records become especially valuable if the claim is later disputed.

Read a partial payment as carefully as a denial

A decision may exclude examination fees, taxes, preventive care, noncovered treatments, expenses during a waiting period, or amounts above a benefit limit. The insurer may then apply the deductible and reimbursement percentage to the remaining eligible amount. Compare the explanation of benefits with the invoice and your policy rather than comparing only the invoice total with the payment.

If the calculation is unclear, request an itemized explanation identifying every excluded charge and the policy provision used. A clerical or coding error may be correctable without a formal appeal.

Why claims are denied

Common reasons include a preexisting-condition determination, treatment during a waiting period, an excluded service, insufficient records, a limit already reached, or a finding that the treatment does not meet the policy’s definition of an eligible veterinary expense. A denial is not proof that the insurer is correct, but it is also not proof of misconduct. The next step is to identify the exact factual and contractual basis for the decision.

Build an appeal around evidence

Read the denial letter and locate every cited policy provision.
Confirm the appeal deadline and required delivery method.
Write a short timeline of symptoms, examinations, diagnoses, and treatment.
Identify the precise fact or interpretation you dispute.
Ask the veterinarian for a focused letter when medical clarification is needed.
Include relevant examination notes, imaging, laboratory results, invoices, and earlier records.
Explain why the evidence satisfies the policy language.
State the requested outcome.
Submit through a trackable method and keep proof of delivery.
Save the final appeal decision and every communication.

Embrace provides a formal route for appealing claim decisions. Pets Best policy forms also describe claim-appeal procedures and may impose a deadline. Do not borrow a deadline from another insurer or another state; use the instructions attached to your own decision and policy.

A giant-breed orthopedic example

Suppose a Great Dane’s cruciate-ligament surgery claim is denied because earlier veterinary notes mentioned intermittent limping. A useful appeal would not merely state that the surgery was expensive or necessary. It would address when the earlier symptom occurred, which limb was involved, whether the records support the insurer’s conclusion, how the policy defines a preexisting or bilateral condition, and what the treating veterinarian can medically clarify.

The strongest appeal connects the evidence to the policy. If the veterinary record is inaccurate, request a dated correction or addendum from the clinic rather than altering the original record.

Internal appeal versus state complaint

An internal appeal asks the insurer to reconsider its claim decision. A complaint asks the state insurance department to examine whether the insurer followed the policy and applicable law. The National Association of Insurance Commissioners advises consumers to try resolving the issue with the insurer first and to gather the policy number, bills, records, correspondence, and a factual timeline before filing a complaint.

A regulator may require an insurer to explain or correct improper conduct, but it does not rewrite the policy to create coverage that the contract excludes. State procedures differ, so use the insurance department for the state connected to your policy.

Questions to ask before buying a policy

How can claims be submitted?
Which documents are required for the first claim?
When does the stated processing time begin?
How will I know that records are missing?
Will I receive an itemized explanation of benefits?
What is the deadline for appealing a decision?
May my veterinarian submit supporting information directly?
Who reviews an appeal?
Are there additional review levels?
Which state insurance department regulates the issued policy?

Sources and further reading

Insurance disclosure: CompareDecisions.com is not an insurance producer, agent, broker, or insurer and does not provide individualized insurance advice. Verify procedures, deadlines, and policy terms with the insurer and the policy approved for your state.

Affiliate disclosure: CompareDecisions may earn compensation from some companies discussed on this site. Compensation does not change the standards used to explain claims or appeals. Trupanion’s affiliate application remains under review, and this guide contains no Trupanion affiliate link.

Read how medical-record reviews affect coverage decisions or return to the main pet-insurance comparison.

Pet-Insurance Claims, Denials, and Appeals Explained