Pre-existing conditions in pet insurance

The definition

Florida law defines a pre-existing condition as one for which, before the policy started or during a waiting period:

a veterinarian gave advice,
the pet was treated,
or signs or symptoms directly related to the condition are known “from verifiable sources”.

The key word is “symptoms”. No diagnosis is needed. Say that a year before you bought the policy, the vet record noted “ear discharge”, “redness between the toes”, “regurgitates after eating” or “itchy”. Two years later you come in with a large bill. Based on that note, the insurer may exclude ear infections, allergies, digestive disease or skin conditions entirely.

How it is checked

Nobody looks at the record when the policy is sold. You can buy a policy in five minutes without a single document. The insurer requests the record at the first large claim, from every clinic the pet has visited, and reads all of it.

There are two exceptions. Trupanion requests records at enrollment and sends a Medical Record Summary: a list of what it treats as pre-existing. Even so, Trupanion says it will make the final decision when a claim is filed. Embrace reviews the medical history after purchase if you ask (Medical History Review). Everyone else checks only when you file a claim.

So read your pet’s vet record before you buy. Ask the clinic for two to three years of records. If they contain errors, or complaints written down “just in case”, ask the clinic to correct them before you buy insurance. After a claim, nothing can be corrected.

Look-back windows and curable conditions

How far back insurers look. Under its terms for all states, Trupanion looks at the 18 months before the policy start date. Most others look at the entire history, with no time limit.
Curable conditions. If an illness has resolved and not come back, some insurers treat it as new again. IAIC (Pumpkin, Spot) does so after 180 days without symptoms or treatment; Embrace, Figo and Lemonade after 12 months. This does not apply to chronic, congenital, hereditary or orthopedic conditions or knee ligaments: those stay excluded for good. Trupanion’s FAQ gives a direct example: an allergy diagnosed in a puppy is never covered, even after years without symptoms.
Bilateral conditions (both sides of the body). If the cruciate ligament in one leg tore before the policy, many insurers also exclude the other leg.
Renewal. Under Florida law, a condition the policy already covered cannot become pre-existing when you renew with the same insurer or an affiliated company. The insurer also cannot require a vet exam as a condition of renewal. This is your main protection: as long as the policy has no gaps, a chronic illness stays covered for life. A gap of even one day turns everything in the record into pre-existing conditions.
Who has to prove it. In Florida the insurer must prove that an exclusion applies. Use this in a dispute. If the record has no entry tied to this specific condition, you can challenge a denial, up to a complaint to the Department of Financial Services.

The guide to state laws covers what other states guarantee. States without a law based on the NAIC model may not offer these protections.

In practice

Insure before the first entry in the record, while the history is clean. Best of all, insure a puppy on the day it comes home.
Do not cancel the policy or switch insurers after the first diagnosis. Switch only while the record is clean.
If you switch, leave no gap: start the new policy, wait out its waiting period, and only then cancel the old one.
Moving between brands of one insurer (for example, from Pumpkin to Spot, both IAIC)? Ask in writing whether this counts as a renewal under §627.71545 that keeps coverage for known conditions. How pet insurance works explains why this is possible.
The wording in the record decides everything. For insurance, the best entry is “Wellness exam, no concerns”. We are not asking you to hide symptoms. We are asking you not to record what is not there.

Pre-existing conditions are also why customers put up with rate increases; see the pet insurance trap and why prices rise. What to ask before you buy is in how to choose.

Sources

Florida Statutes §627.71545, Pet Insurance Act (ch. 2025-11): definitions of pre-existing condition and renewal, burden of proof.
Florida policy forms and disclosures: Pumpkin PET-P-20000-FL, Trupanion TRU (D) 00012 FL, Lemonade and Pets Best sample policies.
Trupanion: FAQ pages and policy terms (Medical Record Summary, 18-month look-back).
Florida Department of Financial Services, Division of Consumer Services: complaints about insurers.