Comprehensive Lab Services (CLS) drug testing provides an objective means to detect abuse or monitor treatment adherence. We are committed to providing reliable, innovative, and value-focused substance abuse screening products and laboratory services. Our laboratory uses an Immunoassay instrument for initial screening and Liquid Chromatography / Mass Spectrometry (LC/MS/MS), the highest analytical standard in the industry from confirmatory procedures. Our services provide health care clinics and physicians offices with prompt and efficient turnaround times with the most accurate interpretation.