Hansen is a fellow in the American College of Apothecaries, and a member of the International Society for Pharmacoeconomics and Outcomes Research and the Washington State Pharmacy Association. He was also an Agency for Healthcare Research and Quality/UW K12 Patient Centered Outcomes Research Scholar, an ARCS Foundation Scholar, and was selected as a Distinguished Alumnus of the UW School of Pharmacy. Hansen has served as a journal referee for “JAMA Internal Medicine,” “Pediatrics,” “Value in Health,” and “The Journal of Pain.” He is also an active pharmacy practitioner in a community practice setting. In this role, he applies his research skills in order to improve the practice of pharmacy.