Do You Still Need Mammograms After 74 — and What About Before 40?

By Kamandeep Chhabra, CCPA, MRT(N) — Director of Operations & Physician Relations, Limeworth X-Ray & Ultrasound, Hamilton

 In Ontario, routine self-referral screening runs from age 40 to 74. After 74, the program stops automatically inviting you, but screening can continue if you’re in good health and want to — that’s a conversation with your doctor, not an automatic stop. Under 40, routine screening isn’t offered for average-risk women, but high-risk women may start as early as 30, and any new symptom at any age should be checked right away.

The Ontario Breast Screening Program covers ages 40 to 74, which naturally raises two questions I hear a lot: "Am I done at 75?" and "I’m in my thirties — should I be screening already?" The age limits aren’t arbitrary, but they also aren’t the whole story. Here’s how to think about screening at both ends.

Why 40 to 74?

Screening ages are set by weighing the benefits of catching cancer early against the downsides of screening — things like false alarms and unnecessary follow-up. For average-risk people, the evidence is strongest between 40 and 74, which is why the OBSP invites this group and lets them self-refer every two years. It’s a population-level guideline, though, and your own situation can shift the picture.

After 74: The Program Stops Inviting — But You Might Not Be Done

Here’s the nuance that matters: at 75, the OBSP stops automatically recalling you. That is not the same as a rule that you must stop screening.

Whether it makes sense to continue depends on your overall health and how you’re doing. For someone in their late seventies who is active and in good health, continued screening may still be worthwhile, because breast cancer risk doesn’t disappear with age. For someone managing serious health conditions, the benefits of finding a slow-growing cancer may be smaller.

This is genuinely a conversation to have with your doctor, weighing your health, your preferences, and what you’d want to do with the information. If you and your provider decide screening still makes sense, it can continue with a requisition — you don’t simply age out overnight.

If your doctor recommends continuing your mammograms past 74, we’re happy to see you in Hamilton with a requisition, on a schedule that fits you.

Before 40: Routine Screening Isn’t the Norm — With Important Exceptions

At the younger end, routine screening isn’t offered to average-risk women under 40, and there are good reasons. Breast tissue tends to be denser in younger women, which makes mammograms harder to read, and breast cancer is less common in this age group, so routine screening would produce more false alarms than benefit.

But there are two big exceptions:

• Higher-risk women. If you have a strong family history, a known gene change (like BRCA1 or BRCA2), or other high-risk factors, the High Risk OBSP can begin as early as age 30, with yearly mammograms and MRI. This needs a referral and an eligibility assessment.

• Anyone with a symptom. Age limits are about screening — checking healthy people with no symptoms. If you notice a lump or another change at any age, that’s a different pathway entirely. See your doctor promptly for an assessment, which usually starts with an ultrasound in younger patients.

How to Decide

• In your late 30s and worried about family history? Talk to your doctor about whether you qualify for high-risk screening rather than waiting for 40.

• Turning 40? You can now self-refer for OBSP screening — a great time to start.

• Approaching or past 74? Ask your doctor whether continuing makes sense given your health and preferences.

• Any age, new symptom? Don’t wait for a screening milestone — get it checked.

The age brackets are a helpful default, not a hard ceiling or floor. The best screening plan is the one you build with your doctor around your own risk and health — and we’re here to handle the imaging whenever it’s time.

Screening Is a Personal Decision — Especially at the Edges

At both ends of the age range, the "right" answer depends on you, not just a number. After 74, it comes down to your overall health, how many good, active years you expect, and how you personally weigh the reassurance of screening against the chance of a false alarm. Some people in their late seventies and eighties want to keep screening; others, especially when managing other serious conditions, reasonably choose to stop. Under 40, the question is really about risk — average risk means waiting, higher risk may mean starting sooner. Neither decision has to be made alone. Bring your family history, your health, and your preferences to your doctor, and make the call together. That shared conversation is worth more than any rigid cutoff.

Frequently Asked Questions

Should I keep getting mammograms after age 74?

The OBSP stops automatically recalling you at 75, but that isn’t a rule to stop. If you’re in good health and want to continue, screening can go on with a requisition — it’s a decision to make with your doctor based on your health and preferences.

Can I get a screening mammogram before 40?

Routine screening isn’t offered to average-risk women under 40. However, high-risk women may qualify for the High Risk OBSP as early as 30, and any symptom at any age should be assessed right away.

Why does routine screening start at 40?

Because that’s where the benefits of screening most clearly outweigh the downsides for average-risk people. Younger breast tissue is denser and breast cancer is less common, which increases false alarms.

Can Limeworth do my mammogram if I’m over 74?

Yes. If your doctor recommends continued screening, bring your requisition and we’ll book you in, including Saturdays.

Book Your Mammogram in Hamilton

Limeworth X-Ray & Ultrasound is a proudly OBSP-participating, ICHSC-accredited diagnostic clinic on the Hamilton Mountain, near CF Lime Ridge Mall with Dynacare bloodwork right across the hall. Our experienced, compassionate female mammography technologists, modern digital mammography and breast ultrasound, and fast appointments (including Saturdays) make breast imaging easy.

To book: For an OBSP screening mammogram, women aged 40–74 can self-refer — email your phone number to 849xray@gmail.com or call 905-574-7755. For a diagnostic mammogram or breast ultrasound, send your doctor’s requisition to the same address.

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