About Thirlby Clinic. Thirlby Clinic is a group practice with 1 location. Currently, Thirlby Clinic specializes in Family Medicine and Internal Medicine with 9 physicians. Thirlby Clinic Office Locations. Thirlby Clinic Plc. 3537 W Front St Ste I Traverse City, MI 49684 (231) 935-8950. Monday : 8:00 AM - 5:00 PM:.