The stigma of substance use disorder (SUD) may be as harmful as the disorder itself. Strategic disclosure is one way to help people deal with SUD stigma. Honest, Open, Proud (HOP) is an evidence-based approach to promoting strategic disclosure. The purpose of this project is to conduct community based participatory research (CBPR) to adapt HOP for SUD. CBPR is a prominent approach to public health that engages people with SUD in all phases of program development and evaluation.