Dr. Reisfield completed a residency in anesthesiology and fellowships in pain medicine and addiction medicine, and is board certified each specialty. His major research interest is adherence monitoring in long-term opioid therapy, and he has authored numerous peer-reviewed articles on this and related topics. He serves on the editorial boards of Journal of Addiction Medicine, Journal of Analytical Toxicology, Journal of Opioid Management, Pain Medicine, and Pain and Therapy, and is a certified medical review officer.