What a mammogram is and why seniors get them

A mammogram is an X-ray of the breast used to look for signs of cancer before you feel any lump or pain. For women over 65, mammograms remain one of the most common ways to catch breast cancer early, when treatment is most effective. The decision to continue getting them depends on your age, health, and how long you are likely to live — not on age alone.

Mammograms work by compressing the breast between two plates while an X-ray machine takes pictures from different angles. The compression is uncomfortable for a few seconds but necessary to get a clear image. The whole appointment usually takes 15 to 30 minutes, though you may wait longer if the radiologist needs additional images.

There are two main types: a standard 2D mammogram (also called digital mammography) and a 3D mammogram (tomosynthesis), which takes multiple images and creates a layered picture of the breast. 3D mammograms may find cancers more reliably and produce fewer false alarms, but they are not yet standard everywhere and may cost more out of pocket.

Key Takeaways

  • Most women over 65 with average risk can continue regular mammograms, but screening decisions should be made with a doctor who knows your health history and life expectancy.
  • Medicare covers one screening mammogram per year for women 65 and older at no cost if your doctor orders it.
  • A mammogram takes 15 to 30 minutes and involves brief discomfort as the breast is compressed; 3D mammograms may reduce false alarms but are not yet widely available.
  • Abnormal results do not mean cancer — most require follow-up imaging or ultrasound, not when ready biopsy.
  • Stopping mammograms is a reasonable choice for women over 75 with serious health conditions, a short life expectancy, or no history of breast cancer.

When doctors recommend stopping mammograms

There is no hard age cutoff for mammograms. Instead, the decision rests on your overall health and how long you are likely to live. The U.S. Preventive Services Task Force recommends that women 75 and older talk with their doctor about whether to continue screening. Women under 75 with serious conditions — advanced heart disease, dementia, advanced cancer — may also benefit more from focusing on comfort than from finding a new breast cancer.

The reason is practical: breast cancer grows slowly in older women. If you are 80 and have other serious health problems, a cancer found today might never cause you harm in your lifetime. Mammograms can also produce false alarms — abnormal results that turn out to be benign — leading to anxiety and more appointments. Weighing that burden against the benefit is a conversation between you and your doctor, not a decision made by age alone.

If you have had breast cancer before, your doctor may recommend continuing mammograms longer, because your risk of a second cancer is higher. If you have never had breast cancer and are over 75 with multiple chronic illnesses, stopping is often the right choice.

What Medicare covers

Medicare Part B covers one screening mammogram per year for women 65 and older at no cost to you — no copay, no deductible — as long as your doctor orders it. The mammogram must be done at a facility certified by the FDA. Your doctor does not have to be a specialist; your primary care doctor can order one.

If the screening mammogram shows something abnormal, a diagnostic mammogram (which takes more images and may include ultrasound) is also covered. You pay nothing for either if Medicare approves it as medically necessary.

If you have supplemental insurance (Medigap) or a Medicare Advantage plan, your coverage may be slightly different, but the screening mammogram itself is always covered by Medicare Part B. Call your plan directly if you are unsure whether a specific facility or type of mammogram is covered.

How to schedule and what to bring

Start by asking your primary care doctor whether a mammogram makes sense for you right now. If your doctor agrees, ask for a written order or referral. You can then call a mammography facility directly — hospitals, imaging centers, and some breast health clinics all offer them — or ask your doctor's office to schedule for you.

When you call, tell them you have Medicare and ask whether they are Medicare-certified. Ask whether they offer 2D, 3D, or both. Ask how long the wait is; some facilities have openings within a week, others may take several weeks.

Bring your Medicare card and any photo ID. Wear a two-piece outfit so you can undress only the top. Avoid scheduling during the week before your period, when breasts are often tender. Avoid deodorant, powder, or lotion on the day of the appointment — these can show up on the X-ray and sometimes require repeat images.

Understanding your results

Results are usually ready within one to two weeks. Your doctor's office will contact you, or the facility will mail a summary. Mammogram results are reported using the BI-RADS scale (Breast Imaging-Reporting and Data System), which ranges from 0 to 6.

A result of 1 or 2 means no cancer was found — normal or benign findings. A result of 3 means probably benign but needs follow-up imaging in three to six months. A result of 4 or 5 means something suspicious was found and a biopsy may be needed. A result of 6 means cancer has already been diagnosed.

If your result is 3, 4, or 5, your doctor will order follow-up imaging — usually an ultrasound or a second mammogram from a different angle — before any biopsy is considered. Most abnormal mammograms turn out to be benign (fibroadenomas, cysts, or dense breast tissue), not cancer. Follow-up imaging often clarifies what you are seeing and may eliminate the need for biopsy.

Ask your doctor to explain your result in plain language. If you do not understand what "probably benign" means or what the next step is, ask again. You have the right to a clear explanation.

Risks and limitations of mammograms

Mammograms use a small amount of radiation, but the dose is low and the risk of harm from that radiation is extremely small — much smaller than the benefit of finding cancer early. If you are pregnant or think you might be, tell the facility before the mammogram.

False positives are common: about 10 to 15 percent of screening mammograms show something that requires follow-up, but most turn out to be benign. This can cause anxiety while you wait for results and additional appointments. False negatives also happen — about 15 to 20 percent of breast cancers do not show up on mammograms, especially in women with dense breast tissue.

Overdiagnosis is a real concern in older women: some cancers found on mammograms grow so slowly that they would never cause harm in your lifetime. This is one reason why the decision to continue screening should be made with your doctor, weighing your personal health and preferences.

Alternatives and additional screening options

If you cannot tolerate mammography — because of pain, anxiety, or physical limitations — other options exist. Breast ultrasound uses sound waves instead of radiation and is particularly useful for women with dense breast tissue or to evaluate a specific area of concern. It is not a screening tool on its own but works well alongside mammography.

MRI (magnetic resonance imaging) of the breast is more sensitive than mammography but is expensive, takes longer, and produces more false positives. It is typically reserved for women at very high risk of breast cancer — those with a BRCA mutation, a strong family history, or a personal history of breast cancer.

Clinical breast exams — where a doctor or nurse feels your breasts for lumps — are no longer recommended as a routine screening tool for average-risk women, though your doctor may do one during a regular checkup. Self-exams are also not recommended as a screening method, though knowing how your breasts normally feel is useful.

Frequently Asked Questions

Does a mammogram hurt?

Mammograms are uncomfortable but not usually painful. The compression lasts only a few seconds per image. If you have tender breasts or anxiety about the procedure, tell the technician — they can sometimes adjust the compression or take breaks. Taking ibuprofen an hour before the appointment may help if you know your breasts are sensitive.

What if I have breast implants?

Mammograms can be done with implants, but the technician needs to know beforehand. Implants can hide some breast tissue, so additional images (called displacement views) are usually taken to see the tissue behind the implant. The appointment may take longer, but the procedure is safe.

How often should I get a mammogram?

For women 65 and older with average risk and no symptoms, once a year is standard. Women at higher risk — those with a family history of breast cancer or a personal history of breast cancer — may need more frequent screening or additional imaging. Your doctor will recommend a schedule based on your individual risk.

What should I do if my mammogram is abnormal?

First, do not assume it means cancer. Most abnormal mammograms are benign. Your doctor will order follow-up imaging — usually ultrasound or a second mammogram — to clarify what was seen. If follow-up imaging is still unclear, a biopsy may be recommended. Ask your doctor to explain each step and what it means before you move forward.

Can I refuse a mammogram if my doctor recommends one?

Yes. Screening is always your choice. If you decide not to have a mammogram, talk with your doctor about your reasons — whether it is anxiety, concern about overdiagnosis, or something else — so you can make a decision together that fits your values and health.