Diagnostic Laboratory Services, Inc. (DLS) is the largest locally owned and operated laboratory in Hawai`i. We serve the entire state of Hawai`i at over 40 locations, as well as Guam and Saipan. At DLS, we care about the patient experience and we believe that our service makes the difference. Since 1985, DLS has been providing excellent laboratory results to help our patients receive the best care possible.