Millennium Health is an accredited specialty laboratory providing medication monitoring via definitive urine and oral fluid drug tests to support improved clinical decision-making as part of treatment for millions of Americans with chronic pain, mental illness, substance use disorders, and other health conditions. Drug testing is used to obtain objective information about patients’ recent use of prescription medications and/or illicit drugs and helps monitor the effectiveness of treatment plans. We also conduct real-time tracking of emerging drug use trends to help researchers, public health officials, and policymakers address the significant increase in drug overdose deaths.