A Novel Intervention for Patients With Cancer

This research study is being done to develop an intervention for psychological symptoms that patients diagnosed with cancer may experience. Psychological symptoms may include thoughts, feelings, emotions, and memories The names of the study intervention and research activities involved in this study are/is: * Acceptance \& Commitment Therapy (ACT) for Cancer (involving 6 sessions with a licensed clinical psychologist) * Questionnaires * Post-study interview Consistent with the NIH Stage Model for Behavioral Intervention Development, the investigators have adapted an existing, empirically-validated intervention, Acceptance and Commitment Therapy (ACT), to address substance use disorder risk during cancer care. The core components of ACT are particularly well-suited to address the psychological processes underlying opioid misuse in individuals treated for cancer pain. The overarching aim is to assess the feasibility and acceptability of the intervention by conducting a randomized pilot trial of the revised intervention ("ACTION") for cancer patients on opioid therapy, and at risk for SUD.