INTRODUCTION: Hand allotransplantation is a treatment option available for individuals who have suffered a traumatic upper extremity injury. To date, there is not an industry-standard recognized measurement tool to assess post-hand allotransplantation functional performance. A commonly used observational functional assessment tool is the Carroll Upper Extremity Function Test (UEFT). This study explored therapists' perceptions of the Carroll UEFT applicability to measure functional outcomes post-hand allotransplantation. METHODS: The study employed a qualitative phenomenological approach with in-depth, semi-structured interviews with five occupational therapists and two physical therapists representing five hand transplant centers in the United States. Braun and Clarke's six-phase thematic analysis approach was utilized for data analysis. RESULTS: The findings generated four themes: (1) scoring is too vague and subjectivity prevails, (2) questionable reliability of the scores, (3) translates to real-life functional tasks, and (4) outcomes affecting decisions. CONCLUSION: The study identified limitations of the Carroll UEFT as applied to a targeted population, hand transplant recipients. The