You need a mammogram before breast surgery if over age 35. Top reasons why.

Posted on November 21, 2025

I have a patient who wants to have a breast lift. She is 39, and we tell our patients over the age of 35 they have to have a breast mammogram prior to surgery. She “talked to her doctor” who said it was not necessary until age 40. I disagree.  The reason? Will go into more below, but I have had multiple patients find cancers, find lumps that need biopsies- real concerns which need to be addressed before cosmetic breast surgery.

When do people usually start getting mammograms?

The usual age to start getting breast mammograms is age 40. This is the standard agreed on for average risk patients by the American College of OB Gyne, US Preventive Services Task Force, American College of Radiology, the Society of Breast Imaging, and the American Cancer society.

So why do we recommend age 35 on up? Because we are doing elective surgery of the breast. That means we are cutting into the breast, and if there were a cancer, could be moving the cancer. Breast cancer under age 40 is relatively uncommon (estimates are 4-11%) but recently rates of breast cancer at younger ages have been slowly increasing.

I am a plastic surgeon in the Bay Area, and many of my patients are not average surgical risk. They have not had kids or had kids at an older age. Many of my breast reduction patients have large, dense breasts. Read below about the increased risk of breast density.

What are dense breasts?

Breasts are made of fat and breast tissue. The more breast tissue = denser breasts. IF YOU HAVE DENSE BREASTS YOU ARE AT AN INCREASED RISK FOR BREAST CANCER. You also may require more imaging to “see” through the dense tissue, like an ultrasound or MRI. See my blogs on breast density.

Top 5 reasons you need a mammogram prior to breast surgery

Dr. Greenberg’s final thoughts on breast mammograms

Breast cancer hits 12% of all women. 1 out of every 8 women.  If you have dense breasts, which particularly many of my breast reduction patients do, that risk doubles to 25%. Many of my Palo Alto and Menlo Park patients had kids at an older age or didn’t have children. That also increases your risk.

Screening is so important, and we have had many patients find things on their initial screen, even when under the age of 40 with no prior family history or risk factors.

Safety is key when doing elective surgery. I like boring, uneventful surgeries and healing. Be exciting at a cocktail party, not in my OR.


The information provided on this website is for general informational purposes only and does not constitute medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider for any questions regarding your health or medical condition.

This blog has been authored by Dr. Lauren Greenberg

Dr. Lauren Greenberg is a Stanford-trained, board-certified plastic surgeon who brings over two decades of experience and a strong commitment to natural-looking results. She is known for combining advanced techniques with an honest, thoughtful approach to help patients feel confident and empowered.

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