Current breast cancer screening guidelines promote the use of shared decision making for women younger than 50 years of age, yet their effect on mammography utilization is largely unknown. This study aimed to examine the effect of two elements of shared decision making on the use of mammogram screening: patient-perceived choice and patient-provider communication. Data were obtained from HINTS 4, a nationally representative survey of the U.S. population, administered from 2011 to 2013. Choice was measured with the question "Has a doctor ever told you that you could choose whether or not to have a mammogram?" Communication was measured using a 7-item scale (range: 7-28; higher scores denote better communication). Binary logistic regression models assessed the effect of patient choice and communication on ever having a mammogram using weighted sample data. The sample included 1,085 women younger than 50 years of age: 31% of women perceived having a choice to undergo mammography. The mean patient-provider communication score was 22.8. Those who thought they were given a choice regarding mammography were more likely to have a mammogram relative to those who did not think a choice was given by the provider. Patient-provider communication had no significant association with mammography utilization. Patient perceived choice, but not patient-provider communication, is positively associated with mammography utilization in women younger than 50 years of age.