Pre-existing conditions are the single most important rule in pet insurance, and the one most often misunderstood. If your pet already has a condition when the policy starts, the insurer will almost never pay for it. This guide explains how the rule works, how the insurers describe it on their own sites, and what to do if your pet already has a diagnosis.
Insurer statements were checked on each company’s website on October 13, 2026. Terms vary by state and policy. Sources are listed at the end.
What Counts as Pre-Existing
A condition is generally pre-existing if your pet had signs of it, or it was diagnosed or treated, before the policy started or before the waiting period ended. The key point is that it does not need a formal diagnosis: a vet note recording symptoms is often enough. Lemonade’s pet page states that conditions with signs before the waiting periods end count as pre-existing, and that it covers new accidents and illnesses under base coverage.
How Four Insurers Describe the Rule
| Insurer | What its own site says |
|---|---|
| Embrace | “No pet insurance company covers pre-existing conditions,” but curable conditions could be covered going forward if the pet goes 12 months symptom free. It reviews 12 months of medical records before purchase and offers a free Medical History Review. Incurable conditions, with diabetes and allergies as examples, stay excluded |
| Lemonade | Conditions with signs before the waiting periods end count as pre-existing. Waiting periods of 14 days for illness and 30 days for orthopedic conditions |
| Healthy Paws | Covers treatment for new accidents or illnesses except pre-existing conditions. Other exclusions may apply |
| Nationwide | Pre-existing conditions are not eligible for coverage |
Trupanion’s comparison page refers to exclusions such as pre-existing conditions in its policy, and it describes a per-condition deductible. Details of each exclusion are in the policy documents, not on the marketing pages, so read them before you buy.
Two Different Approaches
- Permanent exclusion. A condition that was present at enrollment is excluded for the life of the policy.
- Curable condition rule. Embrace says it may cover a curable condition if the pet has gone 12 months with no symptoms. Ear infections and gastrointestinal upset are its examples.
The difference matters most for pets with a minor, one-time issue in their record. For chronic conditions such as arthritis or diabetes, both approaches exclude them.
A Timeline Example
This is an illustration of how the rule works, not a real case. A dog has an episode of limping in March, and the owner buys a policy in May, with a 30-day orthopedic waiting period.
| Date | Event | Effect |
|---|---|---|
| March | Vet records a limp in the left back leg | On record before the policy |
| May 1 | Policy starts | Waiting periods begin |
| September | Dog is diagnosed with a torn ligament in that leg | Likely treated as pre-existing, since the limp predates the policy |
| Next year | The other leg tears | Many insurers also treat this as pre-existing if it is considered a related, bilateral condition |
If the same dog had been insured as a puppy, the March limp would not have been a prior record, and the later tear would normally have been covered after the waiting period. For a $4,500 surgery on the standard plan ($500 deductible, 80%), that is the difference between about $3,200 paid by the insurer and $0.
What to Do If Your Pet Already Has a Diagnosis
- Still insure for what is not there. A policy will exclude the known condition, and cover accidents and new illnesses. It remains useful for the large, unpredictable bills.
- Ask the insurer for a medical history review. Embrace offers one for free. It is a way to see how the history will be treated before you pay.
- Check how related conditions are handled. Some policies exclude conditions affecting the same body part or system.
- Do not hide anything. If you leave something out and the insurer finds it in your records at claim time, it can deny the claim.
- Set aside savings for the known condition. See insurance vs. a savings account.
What Insurance Cannot Do Retroactively
- It cannot cover a condition that started before the policy.
- It cannot cover signs that appear during the waiting period. See waiting periods explained.
- It cannot reset the clock by switching insurers: a new insurer reviews the whole history.
For the broader list of exclusions, see what pet insurance does not cover, and for timing, when to get pet insurance.
Frequently Asked Questions
Is a condition common in the breed pre-existing? No. Breed risk alone is not a prior condition. Only your pet’s own symptoms or diagnosis count.
Does a vet note without a diagnosis count? It can, if it records signs of the condition.
Can a pre-existing condition become covered later? Only under a curable condition rule such as the one Embrace describes, and only for conditions it considers curable.
Do new insurers see old records? Yes. They ask for your vet records, usually from the previous 12 months or longer.
The Bottom Line
The best defense against the pre-existing condition rule is time: insure while your pet is young and has no history. If your pet already has one, you can still insure for everything that comes later, and you should ask the insurer how it treats your pet’s record before you pay.
Sources
- Embrace Pet Insurance, embracepetinsurance.com, accessed October 13, 2026.
- Lemonade, Lemonade Pet, accessed October 13, 2026.
- Healthy Paws, Healthy Paws pet insurance, accessed October 13, 2026.
- Nationwide Pet Insurance, petinsurance.com, accessed October 13, 2026.
- Trupanion, Pet insurance comparison, accessed October 13, 2026.
This article is general information, not insurance advice. Policy terms vary by company, state and policy date.