Criterion Services, Inc. is a full-service occupational health and testing clinic based in Johnson City, Tennessee, serving clients across Northeast Tennessee. We specialize in DOT and non-DOT drug testing, pre-employment physicals, lab services, DNA and paternity testing, ChildGuard testing, post-accident and return-to-duty testing, HPEs, and random testing program management (TPA services). Attorneys, trucking companies, HR departments, manufacturing companies, and families rely on us for accurate, efficient, and confidential results. Unlike large clinics, we offer same-day appointments, short wait times, and personalized care, all while maintaining strict compliance with FMCSA, OSHA, and SAMHSA guidelines. At Criterion Services, our mission is clear: Relate. Educate. Motivate. Advocate. Whether you need workplace compliance solutions, legal case support, or personal testing, we are your trusted partner in occupational health and testing.