Michelassi was honored as an Official of the
Order of Merit of the Republic of Italy with the rank of Commendatore, In 2010, he received the "Campano d'Oro" medal from the University of Pisa, the highest honor that can be accorded to a
University of Pisa alumnus. In 2012, he received the “Grand Award of Merit,” the most notable award of the American Society of the Italian Legions of Merit. In 2017, he was the recipient of the "Society of Surgical Oncology Distinguished Service Award," presented for outstanding contributions to surgical oncology through service to SSO, research, clinical care or health policy. In 2019, he was named an "Honorary Fellow of the Society of Black Academic Surgeons." In 2022, he was honored with the "SSAT Founders Medal," in recognition of his contributions to GI Surgery. In 2024, he received the "Rosenthal Humanitarian Award," from the Crohn's and Colitis Foundation-Greater New York Chapter. Michelassi has been honored also by international surgical societies for his contribution to Surgery. He was awarded honorary membership in the Societa’ Italiana di Chirurgia (Italian Surgical Society) in 2018, in the European Surgical Association in 2019 and in the Deutsche Gesellschaft fur Chirurgie (German Society of Surgery) in 2024, in the Royal College of Surgeons of England and the Japanese Surgical Society in 2025. == References ==