Despite the seriousness of Hepatitis C (HCV), many patients do not receive treatment. One promising means of addressing these issues for medically ill patients is through participation in support group services. This study examined individual-, treatment- and system-level factors associated with enrolling in a support group intervention (psychoeducation) for persons with HCV. A total of 235 research participants were recruited as part of a NIAAA-funded randomized clinical trial for patients with HCV and their family members, with 172 (73.2 %) agreeing to enroll in the psychoeducation trial and 63 (26.8 %) declining. Factors leading to enrollment indicated that individuals without employment, with certain personality structures (low cooperativeness and self-directedness), and traveling greater distance to their group were more likely to agree to participate. Populations being seen in public settings demonstrate a desire for additional support and education, but at the same time these potential participants are faced with challenges to following through and enrolling in the desired services. © 2012 Springer Science+Business Media, LLC.