Mammography Screening

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Percentage of female Medicare enrollees ages 65-74 who received an annual mammography screening. The 2024 Annual Data Release used data from 2021 for this measure.

Evidence suggests that mammography screening reduces breast cancer mortality, especially among older women.1 A physician’s recommendation or referral – as well as satisfaction with physicians – are major factors facilitating breast cancer screening. The American Cancer Society recommends that women ages 40 to 44 should have the option to begin yearly mammograms, women ages 45-54 should get mammograms every year, and women 55 and older should get mammograms every 2 years.2

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Data and methods

Data Source

Mapping Medicare Disparities Tool

The Centers for Medicare & Medicaid Services Office of Minority Health's Mapping Medicare Disparities (MMD) Tool contains health outcome measures for all states and counties for disease prevalence, costs, hospitalization for 55 specific chronic conditions, emergency department utilization, readmissions rates, mortality, preventable hospitalizations, and preventive services.

Website to download data
For more detailed methodological information

Key Measure Methods

Mammography Screening is a percentage

Mammography Screening is the percentage of female fee-for-service (FFS) Medicare enrollees, ages 65-74, who received an annual mammogram.

The method for calculating Mammography Screening has changed

With the 2019 Annual Data Release, the source for this measure switched from Dartmouth Atlas of Health Care to Mapping Medicare Disparities. The current data source includes mammography screening for women between the ages of 65 and 74; the Dartmouth Atlas of Health Care data only included women ages 67 to 69.

Measure limitations

Mammography Screening includes women ages 65-74 on Medicare; however, by using data on only this subset of women, this measure may potentially miss trends and disparities among younger age groups or women not on Medicare.

This measure captures women who have received a mammogram in the past year; however, the current recommendation for this age group is to get a mammogram every 2 years. For this reason, our measure may underestimate the percentage of women meeting the current mammography screening recommendation.


The numerator is the number of women ages 65-74 enrolled in Medicare Part B for at least one month of the selected year who have had a mammogram in the last year (Current Procedural Terminology/Healthcare Common Procedure Coding System codes: 77052, 77057, 77063, G0202).


The denominator is the number of female Medicare beneficiaries ages 65-74 enrolled in Medicare Part B for at least one month of the selected year. Individuals enrolled in Medicare Advantage at any point during the year are excluded.

Can This Measure Be Used to Track Progress

This measure can be used to track progress with some caveats. It is important to consider the data source change introduced with the 2019 Annual Data Release, when comparing Mammography Screening data across years. Additionally, the measure includes mammography screening received by those enrolled in the Medicare FFS program only.

Finding More Data

Disaggregation means breaking data down into smaller, meaningful subgroups. Disaggregated data are often broken down by characteristics of people or where they live. Disaggregated data can reveal inequalities that are otherwise hidden. These data can be disaggregated by:

  • Age
  • Gender
  • Race

Mammography screening data by age groups, gender, and race can be obtained from the Mapping Medicare Disparities tool.


1 Elmore JG, Armstrong K, Lehman CD, Fletcher SW. Screening for breast cancer. Journal of the American Medical Association. 2005;293(10):1245-1256.

2 American Cancer Society. American Cancer Society guidelines for the early detection of cancer. 2023. Accessed January 26, 2024.

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