Inclusion Criteria:  Age 18 or older DSM-5 opioid use disorder diagnosis treated with medications for opioid use disorder (MOUD)  Exclusion Criteria:  Mindfulness intervention experience (MBSR, MBRP) Active psychosis or high risk of suicidality Cognitive impairment (per self-report or report by clinician) Unwilling or unable to remain in MOUD treatment for duration of study