Paul K. Simpson, MD, is a board-certified Internal Medicine specialist with over 35 years of experience in primary care Internal Medicine in Alaska, California, Missouri, Pennsylvania, and Texas. At Family Recovery Solutions, he treats substance abuse and addiction patients, and at Danville State Hospital, he provides medical care to inpatients. Dr. Simpson started his primary care practice career by founding Valley Medical Care in Juneau, Alaska. In addition to his office and hospital practice, he supervised eight mid-level medical practitioners staffing clinics in remote island villages of the Southeast Alaska archipelago. He also operated Clinic Vessel Faering, a floating medical clinic which served mining, fishing, logging and native Alaskan villages not accessible by road. In 1989, Dr Simpson joined Scripps Clinic and Research Foundation in San Diego, California. His responsibilities there included attending physician teaching rounds for the Scripps Clinic Internal Medicine Residency Program. He developed the Quality Assurance and Peer Review programs at the Scripps Clinic La Mesa site and served as first chairperson on those committees as well as serving on the system-wide Executive, Peer Review and Quality Assurance committees. He also served as clinical instructor and mentor for the University of California at San Diego Medical School's Introduction to Clinical Medicine course. His practice experience has focused on general adult medicine with special interest in gastroenterology, addiction medicine, and transportation health. Dr. Simpson has performed colonoscopy and esophagogastroduodenoscopy (EGD) since 1980. Dr. Simpson's main area of research and publication has been the effect of transportation systems on human health. He has lectured on this topic in the USA, Canada, Germany, and Ireland. Dr Simpson is married and has two adult daughters.