Background: Proficiency testing (PT) is the most commonly employed type of External Quality Assurance (EQA) and a tool to measure laboratory performance. Participating in PT is crucial for clinical laboratories that will help the participating laboratory to reduce errors, produce accurate patient test results and most importantly improve patient care by taking corrective action accordingly. The aim of this study is to assess the utilization of PT result in their laboratory Service and Identify challenges related to its utilization effectiveness.