How pre-existing conditions work
A pre-existing condition is generally any condition that showed signs before coverage started or during a waiting period — whether or not it had been formally diagnosed. This is the most common reason a claim is denied, and the most important thing to understand before buying.
Signs count, not just diagnoses
Insurers typically look at the medical record for evidence that something was already present. A note about limping, recurrent ear infections or an unexplained weight change can be enough for a later related claim to be excluded, even if nobody named a condition at the time. Vet records matter more here than what you personally knew.
Curable versus incurable
Some providers distinguish between the two. A condition treated and fully resolved, with a symptom-free period of a defined length, may become eligible again — a one-off bout of diarrhoea, for example. Conditions regarded as lifelong, such as diabetes or many allergies, are normally excluded permanently. The symptom-free window and the list of what counts as curable differ between providers.
Bilateral conditions
Many policies apply a bilateral clause: if your dog had a cruciate ligament injury in one knee before coverage, the other knee may also be excluded, on the reasoning that the underlying predisposition predates the policy. Ask about this specifically if there is any orthopedic history.
If your pet already has a condition
Coverage is not necessarily pointless. A policy will not help with the existing condition, but it can still cover unrelated future problems — and most pets develop more than one thing over a lifetime. Whether that is worth the premium is a judgement about your own finances, and the honest answer is that it depends on the condition and the pet's age.
Common questions
Will an insurer see my pet's full history?
Generally yes. Insurers commonly request veterinary records when a claim is filed, sometimes going back years. Assume the whole record is visible.
Can a pre-existing exclusion be reviewed?
Some providers will reconsider a curable condition after a documented symptom-free period. Ask what evidence they require and how long the window is.
Ready to compare?
The comparison tool narrows the list based on your pet and what you want covered. It does not recommend a policy — that decision depends on your pet's history and your finances.
Compare Pet Insurance