Dr. John Hubbell is the Chief of Anesthesiology at the Rood and Riddle Equine Hospital in Lexington, Kentucky, and holds the title Professor Emeritus of Veterinary Clinical Sciences at The College of Veterinary Medicine of The Ohio State University. Dr. Hubbell has been a Diplomate of the American College of Veterinary Anesthesia and Analgesia since 1982.

Dr. Hubbell was raised in Lima, Ohio, in a pet and horse owning family. After receiving his DVM from Ohio State in 1977, he served an equine surgery internship at the University of California at Davis then returned to Ohio State as a resident in veterinary anesthesiology. Dr. Hubbell was a faculty member at Ohio State from 1982 until 2015 when he joined Rood and Riddle.

Dr. Hubbell is author of numerous articles on veterinary anesthesia and coauthor of two textbooks: Handbook of Veterinary Anesthesia and Equine Anesthesia Monitoring and Emergency Therapy. Dr. Hubbell is an active member of the American Association of Equine Practitioners and speaks frequently at the annual meeting on topics related to anesthesia.