The complex nature of self-disclosure poses challenges for genetic counselors in clinical practice. We examined the impact of genetic counselor self-disclosure on observer perceptions of the counselor. In an online analog study, 123 participants watched a 3-minute video of a simulated genetic counseling session. For half the participants, the video showed the counselor disclosing that she had a family medical history similar to the patient (direct personal disclosure). For half the participants, the counselor revealed her experience with other patients (direct professional disclosure). Half the participants in each video condition read that the patient had discovered personal information about the counselor during a pre-session web search (indirect personal disclosure); half read that the patient learned of the counselor's FAQ webpage for prospective patients (indirect professional disclosure). Participants in the direct personal disclosure conditions gave higher ratings to the counseling relationship on an abbreviated version of the Barrett-Lennard Relationship Inventory and rated themselves more likely to see the counselor compared to those in the direct professional disclosure conditions. The content of the indirect disclosure conditions (personal or professional) had no effect. Brief, direct, verbal disclosure of session-relevant personal information by a genetic counselor appears to enhance the counselor-patient relationship and increase the likelihood of patients returning to the counselor.