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News
State laws requiring dense breast notifications — and mandating insurance coverage — are driving more women to get supplemental ultrasound after mammography. A large study of over 12.5 million women found that insurance coverage laws nearly doubled the odds of supplemental ultrasound use. Experts stress that not every woman with dense breasts needs extra screening, but awareness is the critical first step.
State-level dense breast notification and insurance coverage laws are making a measurable difference in how women follow up after mammography. A retrospective study published in JAMA Network Open, tracking over 12.5 million women aged 40–64, found that both types of laws were independently associated with increased use of supplemental ultrasound — and to a lesser extent, MRI — after routine screening.
The effect was especially pronounced when it came to insurance coverage: women in states with coverage mandates had nearly double the odds of getting supplemental ultrasound compared to those without. Notification laws that specifically targeted women with dense breasts (rather than all mammography patients) and those that included information about supplemental screening options also showed stronger uptake.
By the Numbers:
Why it matters: Dense breast tissue can mask tumors on standard mammograms, making supplemental imaging a potentially life-saving tool. These findings suggest that well-designed state laws — particularly those pairing notification with coverage and targeted messaging — can meaningfully improve screening equity and access.
