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Background: There are limited data evaluating the success of a structured transition plan specifically for pediatric heart transplant (HT) recipients following their transfer of care to an adult specialist. We sought to identify risk factors for poor adherence, graft failure, and mortality following the transfer of care to adult HT care teams. Methods: We retrospectively reviewed all patients who underwent transition from the pediatric to adult HT program at our center between January 2011 and June 2021. Demographic characteristics, comorbid conditions, and psychosocial history were collected at the time of HT, the time of transition, and the most recent follow‐up. Adverse events including mortality, graft rejection, infection, and renal function were also captured before and after the transition. Results: Seventy‐two patients were identified (54.1% male, 54.2% Caucasian). Mean age at the time of transition was 23 years after a median of 11.6 years in the pediatric program. The use of calcineurin inhibitors was associated with reduced mortality (HR.04, 95% CI.0–.6, p =.015), while prior psychiatric hospitalization (HR 45.3, 95% CI, 6.144–333.9, p =.0001) was associated with increased mortality following transition. Medication nonadherence and young age at the time of transition were markers for high‐risk individuals prior to the transition of care. Conclusions: Transition of HT recipients from a pediatric program to an adult program occurs during a vulnerable time of emerging adulthood, and we have identified risk factors for mortality following transition. Development of a formalized transition plan with a large multidisciplinary team with focused attention on high‐risk patients, including those with psychiatric comorbidities, may favorably influence outcomes. [ABSTRACT FROM AUTHOR]