Three-dimensional (3D) + two-dimensional (2D)- mammography may have particular value for minority, rural, and underserved women in New Mexico by decreasing recall rates and improving diagnostic sensitivity, thus alleviating some of the unique burdens associated with breast cancer screening in the multi-ethnic and underserved New Mexico patient population. Primary objective: To compare recall rates using 3D + 2D- vs. 2D- mammogram in New Mexico women undergoing screening mammogram between 2013 and 2016. Secondary objectives: Evaluate knowledge, attitudes, perceived barriers, intentions, decisional influences, and other psychosocial/cultural factors influencing breast cancer screening among medically underserved patients and assess what impact 3D + 2D-mammography might have on those perceptions; Determine primary care providers' knowledge, attitudes, beliefs, and preferences regarding 3D + 2D- vs. 2D- mammography; evaluate breast cancer detection rate and biopsy positive predictive value for screening mammograms using 3D + 2D- vs. 2D using PENRAD data; evaluate screening outcome, compliance with recall recommendations, breast cancer detection rate, positive predictive value, and demographics of interest in New Mexico women undergoing screening and offered 3-D mammography (retrospective chart review).