Get Your Free Guide to Medicare and PET Scans

What Medicare Covers Regarding PET Scans

A PET scan, or positron emission tomography scan, is a medical imaging test that helps doctors see how your body's cells are working. Unlike X-rays that show structure, PET scans show activity and function. They use a small amount of radioactive material to create detailed images of organs and tissues inside your body. Medicare, the federal health insurance program for people age 65 and older, covers certain PET scans under specific circumstances.

Medicare Part B covers PET scans when they are medically necessary and ordered by a doctor for particular conditions. The coverage is not automatic for all PET scans—there are specific rules about when Medicare will pay for them. Your doctor must determine that the scan is appropriate for your medical situation. The conditions most commonly covered include initial staging of certain cancers, restaging of cancer after treatment, monitoring for cancer recurrence, evaluation of dementia and Alzheimer's disease, and assessment of cardiac viability after a heart attack.

Medicare typically covers PET scans performed at approved imaging centers and hospitals. The scan itself involves receiving an injection of a radioactive tracer, waiting a period of time for it to circulate through your body, then lying still while a scanner creates images. The entire process usually takes between 30 minutes to an hour, though preparation time may add to your visit length.

It's important to understand that while Medicare may cover the PET scan itself, you may still have out-of-pocket costs. If you have Original Medicare, you typically pay a copay or coinsurance amount. If you have a Medicare Advantage plan (Part C), your costs depend on your specific plan's rules. The amount you pay can vary based on whether the facility is in-network or out-of-network for your plan.

Practical Takeaway: Before scheduling a PET scan, have your doctor confirm with your insurance that the scan meets Medicare's coverage requirements for your specific medical condition. This conversation helps you understand what costs you may face and prevents surprises when you receive bills.

Conditions Where PET Scans May Be Covered

Medicare has established coverage policies for PET scans related to specific medical conditions. Understanding these conditions helps you know when your scan might be covered by Medicare versus when you might face higher out-of-pocket costs. The coverage criteria were developed based on medical evidence showing that PET scans provide valuable information for diagnosis and treatment planning in these situations.

For cancer patients, PET scans play an important role in several scenarios. When someone receives a new cancer diagnosis, a PET scan may be used for initial staging, which means determining how far the cancer has spread. This information helps doctors plan treatment. If a patient completes initial cancer treatment with surgery, chemotherapy, or radiation, a PET scan may be used to check if the cancer has returned. Additionally, when patients are being monitored years after treatment ends, PET scans can help detect recurrence early. Specific cancer types have particular coverage rules—for example, PET scans for certain types of lung cancer, colorectal cancer, lymphomas, and melanomas have defined coverage criteria.

Neurological conditions represent another major area of PET scan coverage. When someone shows signs of memory loss or cognitive decline, doctors may order a PET scan to help diagnose Alzheimer's disease or other forms of dementia. These scans can show patterns of brain activity that differ between normal aging and disease. Medicare covers PET scans in these situations when ordered as part of the diagnostic process and when the results will affect the patient's treatment plan.

Cardiac PET scans are also covered in certain situations. After a person has had a heart attack, a PET scan may show which parts of the heart muscle are still viable—meaning they can still function with proper blood flow. This information helps cardiologists decide whether procedures like angioplasty or bypass surgery might help restore heart function. Without knowing which tissue is still viable, doctors might recommend procedures that won't help, so these scans provide crucial decision-making information.

Practical Takeaway: Ask your doctor whether your specific medical situation falls within Medicare's coverage guidelines for PET scans. If it does, this information becomes important documentation for your medical record and for any insurance questions that arise.

How to Find Approved PET Scan Facilities

Not every imaging center or hospital can perform covered Medicare PET scans. Facilities must meet specific standards and receive approval from Medicare to bill Medicare for PET scan services. Finding an approved facility is an important step because using an non-approved facility could result in higher out-of-pocket costs or having to pay the full cost of the scan yourself.

You can search for Medicare-approved PET scan facilities through several methods. The Centers for Medicare and Medicaid Services (CMS) maintains databases of certified imaging providers. Your doctor's office often has information about which local facilities are approved for Medicare PET scans and can refer you to appropriate locations. When you call facilities to schedule, you can directly ask whether they are certified to perform Medicare PET scans and whether they accept Medicare insurance.

If you have a Medicare Advantage plan rather than Original Medicare, your plan may have additional requirements about which facilities you can use. Some Medicare Advantage plans require you to use in-network providers for lower costs, while out-of-network providers result in higher copays or coinsurance. Your plan's member handbook or website should list approved imaging centers, or you can call your plan's customer service line for this information.

When contacting facilities, provide specific information about your medical situation, including your doctor's order or referral, your diagnosis, and the type of PET scan you need. This helps staff confirm that the facility performs that particular type of scan and can process it under Medicare. Ask about appointment wait times, as some facilities may have longer schedules than others. Additionally, ask whether the facility can help verify your coverage in advance—many facilities will contact Medicare or your insurance plan to confirm that your PET scan meets coverage requirements before your appointment date.

Practical Takeaway: Before scheduling your PET scan, confirm that the facility is Medicare-approved and that it accepts your specific insurance plan. Obtaining pre-approval documentation from the facility can prevent billing problems and help you understand your exact cost responsibility.

Understanding Your Out-of-Pocket Costs

Even when Medicare covers a PET scan, you will likely have some out-of-pocket costs. Understanding these costs in advance helps you budget and prepare financially. The amount you pay depends on your specific Medicare coverage type and whether you have met certain annual deductibles or thresholds.

If you have Original Medicare (Parts A and B), PET scans are covered under Part B, which focuses on outpatient services. Under Part B, you typically pay a copay or coinsurance amount. Coinsurance means you pay a percentage of the approved cost—usually 20% after your deductible is met. Medicare establishes an approved amount for the service, and you pay 20% of that approved amount. Your actual bill depends on the approved amount, which varies slightly based on geographic location and the specific type of PET scan performed. In 2024, you would pay approximately 20% of the approved amount, which typically ranges from $100 to $500 depending on the scan type and location, though these are estimates and actual costs vary.

Your Part B annual deductible also affects your costs. The Part B deductible is reset each year (currently $240 in 2024, though this amount changes annually). If you haven't met your deductible yet when you have your PET scan, you pay the full approved cost until your deductible is satisfied, then pay coinsurance on the remainder. Once you've paid your deductible for the year, you pay only the coinsurance percentage.

If you have a Medicare Advantage plan (Part C), your out-of-pocket costs depend entirely on your specific plan. Some plans cover PET scans with a copay, which might be $50, $100, $150, or another amount depending on your plan. Other plans require coinsurance instead. Some plans may require prior authorization, meaning your doctor must receive written approval from your plan before the scan is performed. If your plan requires prior authorization and your doctor doesn't obtain it, you could face higher out-of-pocket costs or have the service denied. Your plan's member handbook provides specific cost information.

Practical Takeaway: Request an estimate of your out-of-pocket costs from both your doctor's office and the imaging facility before your appointment. Many facilities can provide this estimate by checking your insurance coverage