The purpose of this study was to evaluate the efficacy of an intervention to assist HIV positive men who have sex with men (MSM) in forming and executing strategies for the disclosure of their serostatus to their families of origin. Results indicate that the intervention was successful in assisting men with the primary outcome of disclosure. Participants reported no regret with disclosures occurring during the intervention and follow-up period. Effects on secondary outcomes including family functioning, depression, loneliness, and perceived social support were inconclusive. Implications, refinements of this intervention, and suggestions for future disclosure research are provided.