Your pet gets sick, you file a claim, and the insurance company denies it. A situation like this costs pet owners thousands in unexpected vet bills—and it happens more often than you'd think. Understanding why claims get rejected and how to prevent it will save you stress and money when your furry friend needs care most.
Pre-Existing Conditions Are the #1 Reason Claims Get Denied
Insurance companies won't cover health issues your pet had before the policy started. This includes conditions diagnosed during the waiting period (typically 14 days for accidents, 30 days for illnesses at most insurers). If your cat had a urinary tract infection three months before signing up, any future UTI claim related to that issue will be flagged as pre-existing.
The takeaway: Get your pet a full vet checkup before applying for insurance. Document everything. Some providers like Embrace and Nationwide allow you to disclose existing conditions upfront, and they'll clearly note what's excluded rather than surprising you later.
Exclusions and Waiting Periods
Every policy has exclusions—conditions the insurer simply won't cover. Common ones include:
- Breed-specific hereditary conditions (hip dysplasia in Labs, patellar luxation in Chihuahuas)
- Dental disease and teeth cleaning (some plans cover this for an extra $15–$25/month)
- Behavioral issues and anxiety medications
- Spaying/neutering and preventive care (unless you buy a wellness add-on)
- Chronic conditions if they develop during the waiting period
Waiting periods also differ by insurer. Accidents typically have a 14-day waiting period, while illnesses can be 30 days. Orthopedic conditions (like ACL tears) sometimes have 12-month waiting periods at carriers like Healthy Paws.
Action item: Read the policy's exclusions list before enrolling. If your dog is a Golden Retriever, confirm whether hip dysplasia is covered or excluded.
Insufficient Documentation and Incomplete Claims
Vets' office notes matter more than you realize. If your vet writes "lameness in rear leg" without specifying which leg, the date onset was noticed, or test results, the insurance company may reject the claim as vague. Insurers use these notes to determine whether a condition is new, chronic, or pre-existing.
Missing receipts, invoice details, or diagnostic reports also delay or deny reimbursement. Some insurers require itemized invoices showing the exact procedure code, drug name, and dosage.
Prevention steps:
- Request detailed vet notes and itemized invoices immediately after any visit
- Include diagnosis codes (ask your vet for the ICD-10 code)
- Submit claims within 30–90 days of treatment (the window varies by company)
- Keep copies of all original receipts, not just reimbursement checks
Policy Limits and Deductibles Confusion
Denials also happen when pet owners misunderstand their coverage limits. If you have an annual limit of $5,000 and you've already claimed $4,800 in year-to-date treatments, that final $200 claim will be approved but any amount above the annual max gets denied.
Deductibles work differently depending on the plan. Some insurers use a per-incident deductible (you pay $250 per condition once, then insurance kicks in), while others use an annual deductible (you pay $250 total per calendar year). Policies typically range from $100–$1,000 deductibles, with monthly premiums between $20–$60 depending on your pet's age and breed.
Read your policy's declarations page carefully. It should clearly state your annual limit, deductible type, and reimbursement percentage (usually 70%, 80%, or 90%).
Breed and Age Restrictions
Some carriers deny claims for senior pets or exclude certain breeds altogether. Others increase premiums significantly. If you own a French Bulldog or English Bulldog, expect higher rates due to breathing and orthopedic issues.
Age also matters—many insurers won't issue new policies for pets over 10 years old, or they'll charge 50%+ more. Enroll early if you have a young pet.
Frequently Asked Questions
Q: Can I appeal a denied claim? Yes. Most insurers have a 30–60 day appeal window. Gather additional vet documentation, ask your vet to write a letter explaining the condition's onset date, and resubmit with a written appeal explaining why you believe coverage applies.
Q: Does pet insurance cover wellness visits and vaccines? Not typically under accident-and-illness plans. You'll need a separate wellness add-on (usually $150–$300/year) that covers annual exams, vaccinations, and preventive care like flea treatment.
Q: What's the difference between accident-only and accident-and-illness coverage? Accident-only plans cover injuries (broken bones, poisoning) but exclude illnesses. Accident-and-illness plans cover both. Accident-and-illness runs $30–$60/month for an adult dog; accident-only is cheaper at $10–$25/month but leaves you exposed to expensive illness claims.
Ready to find a plan that fits your pet's needs? Mercoly lets you compare pet insurance providers side-by-side, making it easy to spot coverage gaps and choose the right policy upfront.