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Does pet insurance cover pre-existing conditions?

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Lemonade Pet is not sold in every state.

By the WhichPetPlan editorial team · Last verified 2026-10-02
Short answer

Base accident and illness policies generally exclude conditions that showed signs before coverage or during a waiting period, even without a diagnosis. Some policies reconsider specified curable conditions after a symptom-free period. Benefit-specific exceptions also exist: Lemonade’s Dental Care add-on covers pre-existing dental conditions in certain states, and its end-of-life add-on can apply when euthanasia relates to a pre-existing condition. Read the actual endorsement; these exceptions do not make an existing knee or chronic illness claim covered.

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Lemonade is the one insurer on this site we can send you to for a live quote. That does not make it the right plan for every pet. As of October 2, 2026, Lemonade Pet is not yet available in Alaska, Idaho, Kansas, South Dakota, Vermont, West Virginia, or Wyoming.

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The exclusions cheat sheet

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Symptoms can matter before a diagnosis

A condition may count as pre-existing based on signs before coverage or during the waiting period. Keep veterinary appointments and disclose the full medical history. Lack of a written diagnosis does not guarantee eligibility.

Ask how the policy treats related conditions and both sides of the body. Prior knee signs may affect later cruciate coverage; ask for the applicable state wording rather than relying on a general summary.

Curable-condition rules depend on the policy

Some policies allow specified curable conditions to become eligible again after a symptom-free and treatment-free period. The required period and exclusions differ by insurer and state. A chronic condition or knee injury may remain excluded.

Get written confirmation of the applicable rule for your pet’s history. Do not treat an example involving a resolved ear infection as proof that another diagnosis will be covered.

Separate add-ons can have specific exceptions

Lemonade’s official guide says its Dental Care add-on includes pre-existing dental conditions, no deductible and a $1,000 annual limit. It is offered only in certain states. The separate Dental Illness add-on excludes pre-existing dental disease and routine cleaning.

Lemonade’s end-of-life and remembrance add-on can apply when a vet recommends euthanasia for a pre-existing condition. It has its own benefit limit and terms. Neither exception pays ordinary treatment for an existing knee injury or chronic illness.

Ask what a new policy can still cover

A policy may cover eligible future unrelated conditions, subject to its exclusions and waits. Compare the current quote with the coverage left after any exclusions; do not assume every new diagnosis is covered.

Read the medical-history and dental guides linked below. Ask the insurer how each relevant exclusion or add-on applies before buying.

Related questions

Can pet insurance ever cover a pre-existing condition?
Base accident and illness coverage generally excludes it. Specified curable conditions and benefit-specific exceptions may apply under the issued policy. Lemonade Dental Care covers pre-existing dental conditions in certain states; Dental Illness does not.
Does a condition need a diagnosis to be pre-existing?
No. Signs before coverage or during the waiting period can count even without a diagnosis. Disclose the complete medical history and ask about the applicable exclusion.
Can a new policy cover future unrelated conditions?
It may, subject to the actual exclusions, waits and eligibility rules. An existing condition does not automatically exclude every future claim, but related conditions may be excluded.

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