Adherence to recommended services is essential for long-term effectiveness of ambulatory treatment programs, but factors associated with such adherence are not securely established. We evaluated attendance at 896 scheduled psychiatric clinic visits for 62 patients at a major psychiatric teaching hospital. Visit adherence was found to be significantly higher among patients in an acute stage of illness, those with a personality disorder, those with a post-high-school education, and those living alone. Adherence was also higher when visits were routinely scheduled, when the intervisit interval was shorter, and when the visit entailed psychotherapy rather than pharmacotherapy.