Sutton's medical studies proceeded through the College of Physicians and Surgeons at Columbia University. While he continued to work on patents associated with oil drilling, Sutton also began at this stage to apply his mechanical aptitude to improving medical instruments. With credit for his graduate studies at both the University of Kansas and Columbia University, Sutton obtained his doctorate in medicine in 1907 graduating with “high standing”. He then began an internship at Roosevelt Hospital in New York working in the surgical division headed by Dr. Joseph Blake.