What counts as a pre-existing condition in pet insurance?

Any condition that was diagnosed or showing symptoms before your policy start date is considered pre-existing and permanently excluded. This includes conditions flagged in prior vet records without a formal diagnosis — recurring symptoms, abnormal bloodwork, or a vet note about limping can all create exclusions when claims are reviewed.

How long are pet insurance waiting periods?

Waiting periods vary by carrier and coverage type. Accidents typically have 2–15 day waiting periods. Illness coverage typically has 14–30 day waiting periods. Orthopedic conditions such as cruciate ligament tears often have 6–14 month waiting periods. Any condition that develops during a waiting period is treated as pre-existing.

Does pet insurance cover dental?

Routine dental cleanings are typically excluded from accident-and-illness policies. Dental accidents (broken teeth from trauma) may be covered under some plans. Some policies cover dental illness (e.g. tooth root abscesses). Wellness riders may cover one routine dental cleaning per year. Review each carrier's dental language carefully — it varies significantly.

What Does Pet Insurance Not Cover?

Q: What does pet insurance not cover?

Most pet insurance policies exclude: pre-existing conditions (the leading cause of claim denial), routine and preventive care (vaccines, annual exams, dental cleanings unless a wellness rider is added), breeding and pregnancy costs, cosmetic procedures, elective procedures, and conditions arising during the waiting period. Bilateral conditions, exam fees, and certain breed-specific conditions may also be excluded depending on the carrier.

Exclusions and claim denials are how pet insurance actually works in practice. This reference covers the most common exclusion categories across major US carriers, with waiting period data and the pre-existing condition rules that drive most disputes.

Common exclusions across major carriers

Exclusion	Notes
Pre-existing conditions	Any condition diagnosed or showing symptoms before coverage start date. The #1 cause of claim denial across all carriers. Permanent exclusion in most cases.
Routine and preventive care	Vaccines, annual exams, flea/tick/heartworm prevention, dental cleanings. Excluded from all accident-and-illness policies unless a separate wellness rider is purchased.
Breeding and pregnancy	Pregnancy, whelping, C-sections, fertility treatments. Universally excluded across all major carriers.
Cosmetic procedures	Ear cropping, tail docking, dewclaw removal, declawing — unless a licensed veterinarian deems the procedure medically necessary.
Elective procedures	Any procedure not deemed medically necessary. Spay/neuter is excluded from most standard policies (sometimes covered under wellness riders).
Bilateral conditions (some carriers)	If one knee, hip, or eye has a condition before enrollment, the corresponding condition on the opposite side may also be excluded as "bilateral." Varies significantly by carrier policy language.
Waiting-period conditions	Any condition that develops during the policy waiting period is treated as pre-existing and excluded. Buying coverage the day before a vet appointment does not create retroactive coverage.
Exam fees (some carriers)	Some plans exclude the office visit/consultation fee itself, reimbursing only the treatment costs. Check your policy's definition of "covered expenses."
Experimental treatments	Treatments not approved or widely accepted by the veterinary profession. Clinical trials may be partially or fully excluded depending on carrier.
Behavioral treatments	Training, behavioral therapy, and most prescription behavior medications are excluded from standard plans. A small number of carriers offer behavioral coverage as an add-on.

The pre-existing condition problem

30–40%

Estimated share of pet insurance claim denials citing pre-existing conditions

Across major carriers; specific figures vary by insurer and not publicly reported

2–6 months

Estimated average time between when a pet develops early symptoms and when the owner notices

Veterinary studies on delayed diagnosis; range varies significantly by condition type

The pre-existing condition rule creates a practical problem: conditions often develop before owners recognize them. A dog develops a slight limp in April; the owner doesn't notice anything unusual until June; the vet documents "possible early joint disease" in August; the owner buys insurance in September. All of this is now pre-existing, and the orthopedic condition is excluded — permanently.

When a claim is filed, carriers typically request complete vet records going back 12–24 months (sometimes further). Claims adjusters review those records for any prior mention of anything related to the current claim — symptoms, abnormal values, ambiguous findings — and exclude based on those records. This is standard industry practice, not bad faith.

The practical implication: enrolling before any significant vet visits have occurred minimizes the risk of pre-existing exclusions. A puppy with only vaccines and a single wellness exam has almost no exclusion exposure. A 4-year-old dog with a routine vet history has 4 years of potential exclusion material.

Waiting periods by major carrier

Waiting periods vary by carrier, coverage type, and state. Conditions that develop during a waiting period are treated as pre-existing. The table below reflects publicly documented standard waiting periods — verify current terms on each carrier's website before purchasing.

Carrier	Accidents	Illness	Orthopedic
Lemonade	2 days	14 days	6 months
Embrace	2 days	14 days	6 months
Trupanion	5 days	30 days	30 days
Healthy Paws	15 days	15 days	12 months (hip dysplasia)
ASPCA Pet Insurance	3 days	14 days	14 days

Waiting periods are subject to change and vary by state. Some carriers waive waiting periods with a veterinary exam within 30 days of enrollment. Verify current terms directly with each carrier before purchase.

What is typically covered

Standard accident-and-illness policies typically cover new conditions that develop after the waiting period ends and were not present before enrollment:

Accidents and traumatic injuries

Illnesses and infections

Surgery and hospitalization

Diagnostic tests (bloodwork, X-rays, MRI, ultrasound)

Prescription medications for covered conditions

Emergency and critical care

Specialist and referral visits

Cancer diagnosis and treatment

Chronic conditions (after enrollment, before first diagnosis)

Hereditary and congenital conditions (if not pre-existing)

Coverage specifics vary by policy. Hereditary conditions (hip dysplasia, heart disease, IVDD) are covered by most major carriers if not pre-existing at enrollment — this is a key differentiator. Confirm hereditary coverage language before purchasing for high-risk breeds.

Common questions

Can a carrier add new exclusions at renewal?

Some carriers review medical records at annual renewal and add exclusions for conditions that developed during the prior year. Others maintain the same exclusion list established at enrollment. This is one of the most important policy terms to verify before purchase — ask each carrier specifically whether exclusions can be added at renewal.

What is a 'curable' pre-existing condition?

A small number of carriers (notably Embrace and some others) will remove pre-existing exclusions for conditions that have been symptom-free and treatment-free for a specified period (typically 12–24 months). These are called 'curable' or 'temporary' pre-existing conditions. Chronic or incurable conditions (like allergies, diabetes, or orthopedic disease) remain excluded permanently.

Are teeth and dental disease covered?

Routine dental cleanings are excluded from standard policies. Dental accidents (e.g. a broken tooth from chewing a hard object) are covered by most plans. Dental illness (tooth root abscesses, periodontal disease) is covered by some plans and excluded by others. Wellness riders sometimes include one routine dental cleaning per year. Review the specific dental language in any policy you consider — it varies significantly by carrier.

See how exclusions affect the math for your situation

The calculator uses your pet's breed, age, and spending history to estimate what insurance would have returned — accounting for the policy structure that determines what's claimable versus excluded.

Run the numbers for your breed →