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Insurance2026-05-14 · 10 min read

Pet Insurance Pre-Existing Conditions: Curable, Incurable, Bilateral

How pet insurance defines pre-existing conditions, the difference between curable and incurable exclusions, bilateral condition rules, symptom-based denials, and what owners can do when a claim is.

Ran Chen
Ran Chen
Founder, VetMedGuide. Life-sciences operator and 10× global market-access lead.
Published

Pre-existing conditions are the single most common reason pet insurance claims are denied. Unlike human health insurance under the Affordable Care Act — which prohibits excluding pre-existing conditions — pet insurance in the United States is property and casualty insurance. Insurers can and do exclude conditions that showed any sign before the policy's effective date or during its waiting period.

The problem for pet owners is that "pre-existing" is defined more broadly than most people expect. A condition does not need a formal diagnosis to be pre-existing. Documented symptoms are enough. And the distinction between curable and incurable — a classification that varies by insurer — determines whether a condition might eventually be covered.

This article explains how insurers define pre-existing conditions, how curable and incurable exclusions work, why bilateral conditions create a separate category of denial, how symptoms alone can trigger exclusion, and what owners can do if a claim is denied.

Quick answer

A pre-existing condition is any injury or illness that occurred, reoccurred, existed, or showed clinical signs — whether or not diagnosed by a veterinarian — before the policy's effective date or during its waiting period. Most insurers will not cover pre-existing conditions at all. A few will cover curable conditions after a symptom-free period (typically 180 days to 12 months, depending on the insurer). Incurable conditions — allergies, diabetes, arthritis, hip dysplasia, epilepsy — are excluded permanently by nearly every carrier.

Bilateral conditions add another layer: if one side was affected before enrollment, the other side is often excluded even if the second occurrence happens years into the policy.

How insurers define "pre-existing"

The definition is broader than many owners realize. A condition is pre-existing if any of the following happened before coverage started or during a waiting period:

  • A veterinarian diagnosed the condition.
  • The owner observed symptoms consistent with the condition (limping, scratching, vomiting, increased drinking).
  • The condition existed but had not yet been noticed or documented.

This means that a dog that was licking its paws excessively before enrollment, but was never formally diagnosed with allergies, will likely have allergy-related claims denied. The paw licking is a clinical sign of allergies, and allergies are an incurable pre-existing condition.

Insurers verify this through medical record review. When a claim is filed, the insurer typically requests the pet's veterinary records going back 12–24 months. They look for any mention of symptoms, diagnoses, or treatments that could be linked to the claimed condition.

Curable vs. incurable: the critical distinction

Some insurers distinguish between curable and incurable pre-existing conditions. This distinction determines whether a condition might eventually become eligible for coverage.

Curable pre-existing conditions

These are conditions that can be completely resolved with no further signs or symptoms. Examples include urinary tract infections, upper respiratory infections, ear infections (in some policies), bite wounds, acute diarrhea not linked to chronic disease, and conjunctivitis.

If a pet had a curable condition before enrollment, some insurers will cover future occurrences of that condition after a specified symptom-free and treatment-free period:

Insurer Symptom-free window for curable conditions Notes
ASPCA Pet Health Insurance 180 days (6 months) Exception: knee and ligament conditions are permanently excluded if one side was pre-existing
Embrace 12 months Bilateral exclusion applies: if one side was pre-existing, the opposite side is not covered
Spot 180 days Chronic and incurable conditions remain excluded
Fetch Pet Insurance 12 months (within first 2 years of policy) If the condition recurs during the first 2 years, it becomes classified as incurable
Lemonade 12 months Must be completely symptom-free and treatment-free
Pumpkin 180 days Applies only to conditions deemed curable

The key detail is what "symptom-free" means in practice. If a dog had an ear infection six months before enrollment and the owner was still cleaning the ears with a medicated solution at the time of enrollment, most insurers would not consider the condition resolved. Treatment-free means no medications, no veterinary visits for that issue, and no observed clinical signs.

Incurable pre-existing conditions

These are conditions that cannot be cured and must be managed long-term. Nearly all insurers permanently exclude them. Examples include:

  • Allergies (environmental, food, flea)
  • Arthritis and osteoarthritis
  • Diabetes mellitus
  • Hip dysplasia
  • Epilepsy and seizure disorders
  • Many types of cancer
  • Heart disease
  • Hypothyroidism and hyperthyroidism
  • Intervertebral disc disease
  • Chronic kidney disease
  • Urinary crystals and idiopathic cystitis (when chronic)
  • Cruciate ligament tears (when one side is pre-existing, bilateral rules apply)

Once an incurable condition is documented in the medical record, it is excluded for the life of the policy. Switching insurers does not reset this — the new insurer will review the same veterinary records and reach the same conclusion.

AKC Pet Insurance: the exception

AKC Pet Insurance (underwritten by Independence American Insurance Company) is unusual in that it covers eligible curable and incurable pre-existing conditions after 365 days of continuous coverage. This provision is not available in all states — check with AKC directly for current state availability. The 365-day clock requires continuous coverage — a lapse resets it. AKC is the only major carrier consistently offering this provision, which makes it the primary option for owners seeking coverage for chronic conditions that already exist.

Bilateral conditions: the hidden exclusion

A bilateral condition is one that can affect both sides of the body — hips, knees, elbows, eyes, ears, kidneys. The exclusion works as follows: if one side was affected before or during the waiting period, the other side is excluded even if the second occurrence happens years later under active coverage.

The logic is actuarial: if a dog tears its right cruciate ligament, the left cruciate is statistically at much higher risk. From the insurer's perspective, the underlying predisposition existed at enrollment.

Common bilateral conditions that trigger this exclusion:

  • Cruciate ligament ruptures
  • Hip dysplasia
  • Patellar luxation
  • Elbow dysplasia
  • Glaucoma
  • Ear infections (in some policies)

ASPCA Pet Health Insurance is explicit about this for knee and ligament conditions: if a knee or ligament condition occurred before coverage, any future knee or ligament condition — on either side — is permanently excluded, regardless of the 180-day curable-condition window.

Embrace notes in its policy materials that if one side was pre-existing, "recurrence on the opposite side is more likely and won't be covered."

Owners should ask specifically about bilateral exclusions before enrolling, particularly if the pet has any history of limping, joint issues, or eye conditions.

Symptom-based denials: no diagnosis required

One of the most frustrating denial scenarios for owners is when a condition was never formally diagnosed but symptoms were documented. Examples:

  • A cat was noted to be drinking more water and urinating outside the box at a wellness visit six months before enrollment. Later, the cat is diagnosed with chronic kidney disease. The insurer reviews the record and finds the earlier polydipsia/polyuria noted. The CKD claim is denied as pre-existing.
  • A dog was licking its paws at a grooming appointment noted in the chart. Later diagnosed with allergies. Allergy treatment is denied.
  • A dog had a limp that resolved on its own. Later diagnosed with hip dysplasia. The earlier limp is cited as a pre-existing clinical sign.

The lesson is that veterinary records are the primary evidence source for pre-existing condition determinations. Everything a veterinarian notes in the medical record — including observations the owner may consider minor — can be used to establish that a condition existed before coverage.

Coverage lapses and switching insurers

Pet insurance does not transfer between carriers the way human health insurance does. Each new policy starts fresh with new waiting periods and a new pre-existing condition review.

If a policy lapses — even briefly — several things happen:

  1. New waiting periods apply. The accident, illness, and orthopedic waiting periods start over.
  2. Conditions that developed during the previous policy may now be pre-existing. A cat that developed diabetes while covered, whose policy lapsed, and who is re-enrolled will find that diabetes is now a pre-existing condition under the new policy.
  3. The curable-condition clock resets. Any symptom-free period accumulated under the old policy does not carry over.

This is why continuous coverage matters. A gap of even a few weeks can convert a covered condition into a permanently excluded one.

What to do when a claim is denied

If a claim is denied as pre-existing:

  1. Request the denial explanation in writing. The insurer should specify which condition was deemed pre-existing and cite the medical record evidence.
  2. Review the cited medical records with your veterinarian. Sometimes the record note is ambiguous — for example, "owner reports occasional limping" is not the same as a diagnosis of arthritis. Your veterinarian may be able to write a letter clarifying the record.
  3. File a formal appeal. Most insurers have an appeals process. The appeal should include a letter from the veterinarian explaining why the condition was not pre-existing, supporting medical records, and any evidence that the symptom-free window for a curable condition has been met.
  4. Check whether the condition qualifies as curable. If the condition was resolved and the symptom-free window has passed, request that the insurer re-evaluate under the curable-condition provision.

Appeal success rates are not published by most carriers, but detailed veterinary documentation is the strongest tool. A vague denial can often be reversed with a specific letter from the treating veterinarian.

What owners should ask before enrolling

  • How does this insurer define "pre-existing," and does it distinguish between curable and incurable?
  • What is the symptom-free window for curable conditions, and does it reset if the condition recurs during the waiting period?
  • How are bilateral conditions handled — specifically, if my pet has a joint or eye issue on one side, will the other side ever be covered?
  • Will the insurer review my pet's full medical record at enrollment, or only when a claim is filed?
  • What is the appeals process for a pre-existing condition denial, and what documentation does the insurer require?

Sources

Topics
Pet Insurance & Claims
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