Rationale, design and methods of the

introductionStimulant use disorder is a growing contributor to drug poisoning and mortality in the USA, with disproportionate impact on black communities driven by stimulant-opioid polysubstance use and other structural barriers to treatment. Contingency management (CM) is the most effective evidence-based treatment for stimulant use disorder but remains poorly implemented especially in minoritised communities. Cultural adaptation represents a promising implementation strategy to improve acceptability, engagement and equity of CM while maintaining fidelity to core evidence-based programming. METHODS AND ANALYSIS: The Cultural Adaptation of Contingency Management ( ETHICS AND DISSEMINATION: Ethical approval was obtained from the Yale University Institutional Review Board. All participants will provide written informed consent. Study findings will be disseminated through peer-reviewed publications, scientific conferences and community-engaged channels to inform culturally responsive approaches to CM for stimulant use disorder. TRIAL REGISTRATION NUMBER: NCT07443332.