The goal of this clinical trial is to test a disclosure intervention among people in treatment for opioid use disorder. The main question it aims to answer is whether people who receive a disclosure intervention have better treatment- and recovery-related outcomes one year after receiving the intervention. Participants will complete a brief disclosure intervention designed to help them (1) make key disclosures related to disclosure and (2) build skills to disclose. Researchers will compare results to participants in a waitlist comparator condition, who receive the intervention at the end of the study.

Inclusion Criteria:

• Client of Brandywine Counseling & Community Services
• Receiving opioid use disorder treatment at Brandywine Counseling & Community Services
• Considering disclosing one's opioid use disorder history and/or treatment to someone new

Exclusion Criteria:

• Diagnosis of schizophrenia
• Participation in pilot study of intervention

De-identified data from this project will be shared via the National Addiction & HIV Data Archive Program (NAHDAP), which is hosted by the Inter-university Consortium for Political and Social Research (ICPSR). Responses to surveys and medical record data will be shared.

Data will be made available no later than when the primary outcome paper is published or when the award ends, whichever comes first. The data will be shared indefinitely.

Data will be accessible through the National Addiction & HIV Data Archive Program (NAHDAP). NAHDAP will make data available via restricted-use files (which will require a signed Restricted Data Use Agreement between the requestor's institution and the University of Michigan as well as an application to request access). ICPSR/NAHDAP will approve or deny access based on the results of the application review.