ObjectiveTo describe the development of a web-based, patient-facing decision aid to support patients and research participants to make an informed, values-based decision about whether to receive additional results from genomic sequencing. MethodsWe developed the decision aid following the multi-step process described in the International Patient Decision Aids Standards. This utilized literature review, focus groups, and alpha testing with research participants undergoing clinical genomic sequencing. ResultsThe decision aid, the Optional Results Choice Aid (ORCA), includes a seven-question “values clarification exercise,” illustrative patient quotes, and summative guidance for the user. The decision aid was found to be highly readable, acceptable and relevant in alpha testing. ConclusionWe developed a decision aid to support informed, values-based decision making for patients and research participants considering whether to receive additional results from genomic sequencing. ORCA is being implemented in the NHGRI-funded Cancer Health Assessment Reaching Many (CHARM) study, where we are measuring informed values-choice congruence. Practice implicationsORCA was designed to support patients and research participants to make an informed, values-based decision about whether to receive additional results from genomic sequencing.