The main aim of this study is to present a new, effective approach to diagnose Diabetes Mellitus in a timely, accurate and cost-effective manner, thanks to using technology and new, patented diagnosing procedure. This study shows results of diagnosing Diabetes Mellitus in two different Clinical Expert Decision Support Systems and presents a new way to diagnose diabetes through commonly used urine test strips. It also shows, how this new approach may be reflected into diagnosing algorithms that can be used in diagnostics systems.