Dr. Jason Shih Hoellwarth is an orthopedic surgeon specializing in limb lengthening and complex reconstruction surgery, osseointegration surgery for amputees, as well as treating congenital birth disorders, pediatric deformities, and traumatic injuries. A Chicago-native, Dr. Hoellwarth graduated from Case Western Reserve University with a B.A. in biochemistry and psychology. After graduation, he attended the Keck School of Medicine at the University of Southern California where he led the student-run free clinic, two high school mentoring programs, and completed a year of research in pediatric orthopedic surgery at Boston Children's Hospital. Following orthopedic residency at the University of Pittsburgh Medical Center, where he was a chief resident and responsible for intern training, he completed four successive fellowships to diversify the care he can provide. Dr. Hoellwarth's first fellowship was with the Osseointegration Group of Australia, led by Munjed Al Muderis, where he learned how to perform transcutaneous osseointegration for amputees, which provides a permanent skeletal connection between the bone and the prosthetic limb. He then completed his pediatric orthopedic fellowship at Baylor College of Medicine. This time was split between Houston's Shriners Hospital treating children with problems such as clubfoot (focusing on the Ponseti technique), osteogenesis imperfecta, cerebral palsy, spina bifida, and other issues and at the Texas Children's Hospital with Dr. Scott Rosenfeld caring for children with traumatic injuries, hip dysplasia, and other hip disorders. Dr. Hoellwarth spent the following year focused on pediatric deformity reconstruction at the Paley Institute, where he focused on stature and limb deficiency, including achondroplasia (dwarfism), hypochondroplasia, and hemimelia or deficiency of the femur, fibula, and tibia. Most recently, Dr. Hoellwarth completed his fourth fellowship training with his current Limb Lengthening and Complex Reconstruction partners at HSS, where he solidified his skills with external fixation and hexapod techniques, minimally invasive osteotomies, osseointegration, joint replacement, and managing complex deformity problems such as soft tissue and bone infection, nonunion, malunion, osteochondromas, nerve compression and chronic pain related to bone and joint disorders. Dr. Hoellwarth's continued research endeavors has established him as one of the most published authors worldwide on osseointegration. His research goals are to improve patient care and clinical outcomes. Beyond medicine, Dr. Hoellwarth tries to advocate for the environment and is a volunteer instructor for cultural Chinese lion dance. These hobbies remind him that physical mobility and social equity are essential to health. His hope is to help develop affordable and available care to populations living in limited resource environments.