Professor Fehily treats patients from all over the UK and internationally. He is the lead hip surgeon for the Hip and Groin Clinic, for the English Institute of Sport (Manchester), for the Armed Forces (Northern) and is a registered Consultant in the United Arab Emirates, having practiced in Dubai.
He is the lead on many surgeon education courses, training other consultants from all over the UK and Europe in both key-hole and hip replacement techniques.
He regularly treats high-level athletes, ranging from dedicated amateurs to Commonwealth, World Championship, Olympic and Premier League competitors. He regularly treats professional athletes from sports including football, rugby, taekwondo, squash and athletics amongst many others.