Most pet insurance plans do not cover PET scans, but they may cover other diagnostic imaging your veterinarian orders

A PET scan (positron emission tomography) is a specialized imaging test that tracks how cells use glucose to detect cancer, infections, and organ damage. Most standard pet insurance plans exclude it because the test is expensive, rarely performed on animals, and usually only recommended when a pet already has a diagnosed condition. Your coverage depends on what your policy says about diagnostic imaging in general, what your deductible and co-insurance are, and whether your pet has a pre-existing condition.

The real question is not whether PET scans are covered, but whether your plan covers the diagnostic tests your veterinarian actually recommends. That usually means X-rays, ultrasounds, and bloodwork — which most plans do cover, though with limits and cost-sharing.

Key Takeaways

  • PET scans are almost never included in standard pet insurance plans because they are expensive, rarely used in veterinary medicine, and typically only ordered after a diagnosis is already made.
  • Most plans cover more common diagnostic imaging like X-rays and ultrasounds, but you pay a deductible first and then a percentage of the cost (usually 10 to 20 percent).
  • Pre-existing conditions are almost always excluded, so if your pet has been diagnosed with cancer or another serious illness, imaging related to that condition will not be covered.
  • The best way to know what your plan covers is to read the policy document itself or call your insurer and ask specifically about the diagnostic tests your veterinarian has recommended.

How pet insurance treats diagnostic imaging

Pet insurance companies divide coverage into categories: accidents, illnesses, and wellness. Diagnostic imaging — X-rays, ultrasounds, CT scans, MRI — usually falls under the illness category. That means you must have an active policy before your pet shows symptoms, and the condition must not be pre-existing.

When your veterinarian orders an imaging test, you typically pay the full bill upfront, then submit a claim to your insurer. The company reimburses you based on what the policy allows. If your plan has a $500 annual deductible and 80 percent reimbursement, you pay the first $500 out of pocket, then the insurer covers 80 percent of the remaining cost. You pay the other 20 percent.

PET scans fall outside this standard coverage because they are not routine veterinary diagnostics. Most veterinary clinics do not have PET scan equipment. The test is typically performed at a specialty or research facility, costs between $2,000 and $5,000, and is usually ordered only after a diagnosis like cancer is already confirmed. At that point, the condition is no longer new — it is established — and many policies exclude or limit coverage for conditions diagnosed before the policy started.

What diagnostic tests are usually covered

Standard pet insurance plans cover the imaging your veterinarian orders first: radiographs (X-rays), ultrasound, and sometimes CT or MRI scans. These are the tests that help diagnose the problem in the first place. X-rays and ultrasounds are covered by most plans because they are affordable, widely available, and essential to diagnosis.

CT and MRI scans are covered by some plans but not others. These are more expensive than X-rays or ultrasound and are usually ordered when the initial imaging does not show enough detail. Check your policy documents or call your insurer to confirm whether these are included and what your out-of-pocket cost will be.

Bloodwork, urinalysis, and other laboratory tests are also usually covered under the illness category, though some plans cap the annual amount they will reimburse for all diagnostics combined. If your pet needs multiple tests, ask your veterinarian which ones are most urgent so you can prioritize if your plan has a limit.

Pre-existing conditions and what they mean for imaging

A pre-existing condition is any illness, injury, or symptom your pet had before your policy started or during the waiting period. Once a condition is pre-existing, no imaging related to it is covered — not now, not ever, for the life of the policy. This is the single biggest reason claims for diagnostic imaging are denied.

If your pet was limping before you bought insurance, and six months later your veterinarian wants to X-ray the leg to see if there is a fracture or arthritis, that X-ray will not be covered because the limping was pre-existing. The insurer will argue that the condition existed before the policy took effect, even if you did not know what was causing it.

This matters for PET scans especially because they are usually ordered for pets that already have a diagnosis. If your pet was diagnosed with cancer before your insurance started, a PET scan to monitor that cancer will not be covered. If your pet develops a new, unrelated condition after the policy starts, imaging for that new condition should be covered — assuming it is not excluded for another reason.

Wellness plans and preventive imaging

Some insurers offer optional wellness add-ons that cover preventive care: annual exams, vaccinations, dental cleanings, and sometimes preventive bloodwork. These are separate from accident and illness coverage and usually cost extra per month.

Wellness add-ons rarely cover diagnostic imaging because imaging is ordered when something is wrong, not to prevent problems. However, if your plan includes an annual wellness exam and your veterinarian orders bloodwork as part of that exam, the bloodwork may be covered under the wellness benefit. Imaging ordered because of abnormal bloodwork results would fall under illness coverage instead.

Read the fine print of any wellness add-on you are considering. Some plans are clear about what counts as preventive; others are vague. If you are unsure whether a specific test would be covered, ask your insurer before your pet needs it.

Specialty and emergency clinics versus regular veterinarians

If your pet needs a PET scan or other advanced imaging, your regular veterinarian will refer you to a specialty clinic or emergency hospital that has the equipment. Most pet insurance plans cover imaging at specialty clinics the same way they cover it at regular clinics — subject to the same deductible, co-insurance, and exclusions.

However, some plans have higher out-of-pocket costs at specialty or emergency facilities, or they may require pre-authorization before you go. Call your insurer before the appointment to confirm what you will owe. Specialty imaging can be expensive, and you want to know your costs before you commit.

If your pet is in an emergency and needs imaging when ready, most insurers will not deny a claim because you did not call first. But if the imaging is planned and not urgent, pre-authorization can prevent disputes later and may save you money if your plan offers a better reimbursement rate for authorized procedures.

How to find out what your specific plan covers

The only way to know whether your plan covers a specific test is to read your policy document or contact your insurer directly. Do not rely on the marketing materials or the company website — they describe what the plan can cover, not what yours does.

Your policy document lists what is covered, what is excluded, what your deductible is, what percentage you are reimbursed, and any annual or per-incident limits. It also lists the waiting periods for different conditions and explains how pre-existing conditions are defined.

If your veterinarian has recommended a specific test — whether it is a PET scan, CT scan, ultrasound, or bloodwork — call your insurer with the test name and ask: Is this covered? What is my deductible? What percentage will you reimburse? Are there any limits on how much you will pay for this test or for all diagnostics combined? Write down the answers and the name of the person you spoke with. If you file a claim later and the insurer denies it, you will have documentation of what you were told.

Frequently Asked Questions

Will pet insurance cover a PET scan if my dog has cancer?

Not if the cancer was diagnosed before your policy started. If your dog was diagnosed with cancer before you bought insurance, that condition is pre-existing and imaging related to it will not be covered. If your dog develops cancer after your policy is active, imaging may be covered, but you will need to meet your deductible and pay your co-insurance percentage.

What is the difference between a PET scan and a CT scan for pets?

A CT scan takes detailed cross-section images of the body using X-rays. A PET scan tracks how cells use glucose to show which areas are most active — useful for detecting cancer spread or infection. CT scans are more common in veterinary medicine and more likely to be covered by insurance. PET scans are rarely used in animals and almost never covered.

If my plan does not cover PET scans, what imaging will it cover?

Most plans cover X-rays, ultrasounds, and bloodwork. Many also cover CT and MRI scans, though you should confirm with your insurer. All of these are subject to your deductible and co-insurance. Call your insurer with the specific test your veterinarian recommended to find out whether it is covered and what you will owe.

Can I get reimbursed for imaging my pet already had before I bought insurance?

No. Pet insurance only covers services provided after your policy starts. If your pet had imaging done before you bought insurance, that claim cannot be submitted. This is another reason to buy insurance while your pet is young and healthy — you avoid pre-existing condition exclusions.

Do I need pre-authorization before my pet gets a PET scan?

Even though most plans do not cover PET scans, call your insurer before the procedure to confirm. Some plans may cover it in specific situations, or your insurer may be able to tell you upfront that it will not be covered, saving you from an unexpected bill. Pre-authorization also protects you if there is a dispute about the claim later.