Medicare's coverage of breast ultrasound depends on why your doctor orders it

Medicare Part B covers breast ultrasound when a doctor orders it as a diagnostic tool — meaning to investigate a specific problem or finding — but not for routine screening in most cases. If your mammogram shows something unclear, or if you have symptoms like breast pain or a lump, Medicare will typically cover an ultrasound to help your doctor see the tissue more clearly. If you have dense breast tissue and your doctor wants an ultrasound as a screening tool before any symptoms appear, coverage becomes more complicated and depends on your state and your specific situation.

The key difference is diagnostic versus screening. Diagnostic means your doctor is looking for the cause of something already found or felt. Screening means looking for disease in someone without symptoms. Medicare covers diagnostic ultrasounds at 80% of the approved amount after you meet your Part B deductible. For screening ultrasounds, coverage varies widely.

Key Takeaways

  • Medicare Part B covers breast ultrasound when ordered by a doctor to investigate an abnormal mammogram, lump, pain, or other breast concern.
  • Screening ultrasounds for dense breast tissue are covered in some states but not others, and your doctor must document medical necessity.
  • You pay 20% of the Medicare-approved amount for covered ultrasounds after meeting your Part B deductible.
  • Your Medigap or Medicare Advantage plan may cover some or all of your out-of-pocket costs, depending on your specific plan.
  • Always ask your doctor's office to confirm coverage before your appointment, since coverage rules can change and vary by location.

When Medicare covers diagnostic breast ultrasound

If your mammogram found an area that needs closer look, or if you have a palpable lump, pain, nipple discharge, or skin changes, your doctor can order a breast ultrasound as a diagnostic test. Medicare Part B covers this ultrasound because it serves a medical purpose — helping your doctor figure out what is happening. You will pay 20% of what Medicare approves for the ultrasound, after you have met your annual Part B deductible (which is $240 in 2024, though this amount changes yearly).

Your doctor's office should note in the order why the ultrasound is medically necessary. This documentation helps the imaging center bill it correctly to Medicare. If the ultrasound is ordered without clear medical reason documented, the imaging center may deny the claim or ask you to pay upfront.

Screening ultrasound for dense breast tissue

Dense breast tissue makes it harder for mammograms to spot cancer, and some states have passed laws requiring doctors to tell women if they have dense breasts. Some women and their doctors then choose ultrasound as an additional screening tool. Medicare's coverage of this screening ultrasound is state-dependent and requires specific documentation.

In states with density notification laws, Medicare may cover supplemental screening ultrasound if your doctor documents that you have heterogeneously dense or extremely dense breast tissue and that ultrasound is medically necessary for you. However, this is not automatic. Your doctor must order it with the medical reason clearly stated, and the imaging center must submit it with the right billing codes. Some states' Medicare contractors are more likely to cover this than others.

If you live in a state without a density notification law, or if your doctor does not document medical necessity, Medicare is less likely to cover a screening ultrasound. In those cases, you may be asked to pay out of pocket, which typically costs between $200 and $400 depending on where you live.

What you pay for a covered breast ultrasound

Once Medicare approves a breast ultrasound as covered, you are responsible for 20% of the Medicare-approved amount. The approved amount varies by location and facility. For example, an ultrasound at a hospital outpatient department may have a different approved amount than one at an imaging center, even in the same city.

Before you meet your Part B deductible for the year, you pay the full cost of the ultrasound until you reach $240 (in 2024). After that, you pay 20% of the approved amount. If you have a Medigap plan (also called Medigap insurance), it may cover some or all of that 20%. If you have a Medicare Advantage plan, your out-of-pocket cost depends on your plan's rules — some have copays for imaging, others cover it fully.

How to confirm coverage before your appointment

The best way to avoid surprise bills is to ask your doctor's office to contact Medicare or your insurance plan before your ultrasound appointment. Ask them to confirm that the ultrasound is covered and what your out-of-pocket cost will be. Provide them with your Medicare card and any secondary insurance information.

If your doctor's office cannot reach your plan before the appointment, you can call Medicare yourself at 1-800-MEDICARE (1-800-633-4227). Have your Medicare number ready and tell them the reason your doctor ordered the ultrasound. They can tell you whether it is covered and what you should expect to pay. If you have a Medicare Advantage plan, call the number on your plan card instead.

What happens if Medicare denies the ultrasound

If the imaging center submits the claim and Medicare denies it, you will receive a notice called an Explanation of Benefits (EOB). This notice explains why Medicare did not cover it. You have the right to appeal the decision if you believe it was wrong.

If you disagree with the denial, you can ask your doctor's office to appeal on your behalf, or you can file an appeal yourself. The imaging center can also help you understand the reason for the denial. Sometimes a denial happens because the medical reason was not clearly documented, and resubmitting with better documentation can reverse it.

Breast ultrasound versus other imaging options

Breast ultrasound is not the only imaging tool Medicare covers for breast concerns. Mammograms are covered annually for women 40 and older. If a mammogram is unclear, your doctor might order ultrasound, MRI, or a biopsy depending on what they are trying to find out. MRI of the breast is covered by Medicare when medically necessary, though it typically costs more out of pocket than ultrasound.

3D mammography (tomosynthesis) is also covered by Medicare as a screening tool for women at average risk. Some women have both mammography and ultrasound as part of their screening, especially if they have dense tissue. Your doctor can discuss which imaging makes sense for your situation.

Frequently Asked Questions

Does Medicare cover breast ultrasound if I have no symptoms?

Only if your doctor documents medical necessity — usually dense breast tissue or an abnormal finding on a prior mammogram. Routine screening ultrasound without symptoms or imaging findings is generally not covered, though some states' Medicare contractors are more flexible than others. Ask your doctor whether your situation meets the criteria in your state.

Will I get a bill if the imaging center says the ultrasound is not covered?

The imaging center should tell you before the appointment if they believe Medicare will not cover it. If they do, ask them to submit it to Medicare anyway and let Medicare make the decision. You should not pay upfront unless you sign an Advance Beneficiary Notice (ABN) agreeing to pay if Medicare denies it. Read any form carefully before signing.

Can I use my Medicare Advantage plan for a breast ultrasound instead of Original Medicare?

Yes. Medicare Advantage plans must cover at least what Original Medicare covers, and many cover more. Call your plan's customer service number before your appointment to confirm coverage and find out your copay or coinsurance amount.

What if my doctor orders an ultrasound but does not document why?

The imaging center may contact your doctor's office to ask for the medical reason before the appointment. If your doctor cannot provide documentation, the imaging center may ask you to pay upfront or reschedule once the reason is documented. It is worth asking your doctor's office to make sure the order includes the clinical reason.

Does Medicare cover breast ultrasound at a screening clinic versus a hospital?

Medicare covers it at either location if it is medically necessary, but the approved amount and your out-of-pocket cost may differ. A hospital outpatient ultrasound may have a higher approved amount than the same ultrasound at an imaging center. Ask the facility what the Medicare-approved amount is for your specific ultrasound before your appointment.