Objective Although telehealth psychotherapies have been studied for over 20 years, mental health services remained largely delivered in person until the COVID-19 pandemic forced clinics to reconsider the utility of telehealth psychotherapy. This study aims to compare patient engagement in in-person versus telehealth services in outpatient psychotherapy for mood and anxiety disorders. Method A cohort investigation was conducted, using a propensity score matched sample, extracted from an electronic health record (EHR) to compare engagement in psychotherapy for 762 patients who used in-person services before the pandemic to a cohort of 762 patients who used telehealth psychotherapy after the onset of COVID-19. The authors compared cohorts on initial engagement in psychotherapy services following an initial intake, number of psychotherapy sessions attended, and the rate of missed sessions. Results There was a 26% increase in the total number of individual psychotherapy sessions attended when the clinics transitioned to telehealth services (p < .001). In addition, patients who received telehealth psychotherapy were five times more likely to not cancel or miss any scheduled sessions (p < .001). Conclusion These results indicate that telehealth services may result in improved treatment engagement for outpatient centers focused on brief evidence-based psychotherapies for mood and anxiety disorders.