RecruitingBehavioural interventionMeasurement of Adherence and Health-Related Quality of Life, and Health-Care Resource UtilizationThe goal of this research study is to learn about the quality of life, experiences with treatment, and healthcare costs of patients who are receiving long-term treatment for venous thromboembolism (VTE) that is related to cancer. This is an investigational study. Up to 260 participants will be enrolled in this multicenter study. Up to 170 will take part in MD Anderson.