Mammograms After 50: How Often, What Medicare Covers and What to Expect
A mammogram is a simple x-ray picture of the breast. It can find breast cancer early, sometimes before it is large enough to feel. Many women over 50 are unsure how often to go, what Medicare pays for, and what to expect. This guide answers those questions in plain words.
Figures and rules below are as of November 2026.
What a Mammogram Is, and Why It Matters
The National Cancer Institute describes a mammogram as a low-dose x-ray of the breast. A doctor who reads these images, called a radiologist, looks for lumps, tiny calcium spots and other changes. A screening mammogram is for people with no symptoms. A diagnostic mammogram is done when there is a lump or other change that needs a closer look.
The CDC says screening can find breast cancer when it is easier to treat, and regular screening can lower the risk of dying from breast cancer. It cannot prevent cancer, and it is not perfect. The CDC also notes that screening has some downsides, such as false alarms that lead to more tests, and cancers that are sometimes missed.
How Often Should You Have One?
The U.S. Preventive Services Task Force recommends a mammogram every two years for women ages 40 to 74 who are at average risk of breast cancer. Both the CDC and the National Cancer Institute point to this guidance. Some women are at higher risk, such as those with a strong family history or certain gene changes. They may be advised to start earlier or be screened more often.
The CDC encourages a shared decision with your doctor, looking at the benefits and risks for you. If you are 75 or older, ask your doctor whether screening still makes sense for you.
Benefits and Limits to Know About
The CDC lists the possible downsides of mammograms in plain terms: a false positive, which means the test looks abnormal but no cancer is found, and which can lead to more tests and worry; overdiagnosis, which means finding a cancer that might never have caused harm; a small amount of radiation from the x-rays; and false negatives, where a cancer is missed. The CDC also says the benefits of screening are real: when breast cancer is found at a localized stage, more than 99% of women are alive five years later.
Other tests you may hear about
The CDC mentions a few other tools. A breast MRI is sometimes used along with mammograms for women at high risk, but it is not used for average-risk screening because it can look abnormal when there is no cancer. A breast ultrasound may be ordered as a follow-up. The CDC also encourages “breast self-awareness,” which simply means knowing how your breasts normally look and feel and telling your doctor about any change. A new lump, skin change or nipple change is worth a call to your doctor even if your last mammogram was normal.
What Medicare Covers
Medicare Part B covers mammograms. Here is how Medicare.gov describes the three types:
- Baseline mammogram: covered once for women ages 35 to 39. It gives your doctor a first picture to compare against later.
- Screening mammogram: covered once every 12 months for women 40 and older. You pay nothing for the test if your provider accepts assignment, which means the provider agrees to Medicare’s approved amount.
- Diagnostic mammogram: covered when it is medically necessary, even more than once a year. After you meet the Part B deductible, you generally pay 20% of the Medicare-approved amount.
A breast ultrasound is covered only when it is medically necessary and ordered by your provider. What you owe can also depend on other insurance you have, the type of facility, and where the test is done.
Medicare.gov also warns that a doctor may suggest a service that Medicare does not cover, or one that is more frequent than Medicare allows. It is fine to ask, “Why do you recommend this, and what will Medicare cover?”
If you are in a Medicare Advantage plan, it must cover what Original Medicare covers, but the plan’s network rules may apply. Call the number on your card to check.
Getting Ready for Your Appointment
The National Cancer Institute shares a few practical tips:
- Skip deodorant, antiperspirant, powder, lotion, cream and perfume on your breasts and underarms that day.
- Tell the staff if you have breast implants, so they can plan the right pictures.
- The machine presses the breast between two plates for a few seconds. This can be uncomfortable for some people. Some find that an over-the-counter pain reliever beforehand helps. Ask your pharmacist whether one is right for you.
- If you have not yet gone through menopause, avoid the days just before or during your period, when breasts may be tender. Most readers here are past that, but it may help a daughter or friend.
- Bring your Medicare card, your photo ID and any earlier mammogram records.
Getting Your Results
The National Cancer Institute says results usually arrive within about two weeks, by mail or in your online patient record, and they also go to the doctor who ordered the test. If you have not heard back in two weeks, call and ask. No news is not always good news.
What if you are called back?
Being called back for more pictures or an ultrasound can be frightening. The National Cancer Institute says most people who are called back do not have breast cancer. Often the radiologist simply needs a clearer view. Try to keep the follow-up appointment, and bring a family member or friend if it helps.
Dense breasts
Your report also notes how dense your breast tissue is. The National Cancer Institute says dense breasts can make a mammogram more likely to miss cancer. If your report says your breasts are dense, ask your doctor what that means for you.
If Cost Is a Worry
The CDC says its National Breast and Cervical Cancer Early Detection Program offers free or low-cost mammograms to people who qualify. The National Cancer Institute’s Cancer Information Service can also help you find low-cost options at 1-800-4-CANCER. Be careful of anyone who calls offering a “free” breast screening in exchange for your Medicare Number or bank details. Real screenings are scheduled through your own doctor or a facility you choose.
Questions to Ask Your Doctor
- How often should I have a mammogram, based on my age and family history?
- Do I have any risk factors that mean I should be screened differently?
- Where is a good place for me to go, and is it covered by my plan?
- How will I get my results, and how soon?
Pairing this with your yearly wellness visit can make it easier to remember. Many people also review other checkups at the same time.
This article is general information, not medical advice. Talk to your doctor or pharmacist about your own health.
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