Dr. David A. Andreychik

Ronald DiSimone, MD, is an orthopaedic surgeon and is certified in orthopaedic surgery by the American Board of Orthopaedic Surgery. He is the medical director of orthopaedic care at UPMC in North Central Pa. He received his medical degree from Hahnemann University School of Medicine and completed his residency at Hahnemann University Hospital. Dr. DiSimone’s clinical interests include orthopaedic spine, robotic total knee replacement, and direct anterior total hip replacement. He is a member of the American Academy of Orthopaedic Surgeons (AAOS), North American Spine Society, Eastern Orthopaedic Association, Pennsylvania Orthopaedic Society, and Lycoming County Medical Society. In his free time, he enjoys hiking and skiing. Dr. DiSimone is designated as a UPMC Health Plan Hip and Knee Joint Replacement Surgery Center of Excellence surgeon at UPMC Williamsport based on his commitment to quality care and outstanding patient experience. Dr. Disimone is rated as a Distinguished provider by MediFind in Herniated Disc Surgery. His top areas of expertise are Spondylolisthesis, Osteoarthritis, Fractured Spine, Microdiscectomy, and Cervical Disc Surgery.

Philosophy of care | Most patients with back or neck pain do not need surgery. I believe my job is to discuss all the options with you so together we can make an informed decision about your care. I think patients do better when they play an active role in their treatment. | Why I entered medicine | I knew early on that I wanted to be a surgeon because of its hands-on aspect. My mother was an operating room nurse, so I had the opportunity to observe surgery while in high school. This experience steered me toward orthopedic surgery. | Community involvement | We are active in our church and with the various sports organizations in which our children are involved. | Personal interests | When not working I enjoy reading, guitar, golf and cycling. | Image | Lehigh Valley Hospital is ranked 25th in the country for orthopedic care on the 2025-2026 U.S. News & World Report Best Hospitals list. Our team of more than 200 orthopedic specialists provide award-winning, nationally-recognized care with experience, expertise and leading-edge technology. |. Dr. Henderson is rated as an Advanced provider by MediFind in Herniated Disc Surgery. His top areas of expertise are Spondylolisthesis, Spinal Stenosis, Scoliosis, Microdiscectomy, and Herniated Disc Surgery.

Dimitrios Papadopoulos is an Orthopedics provider in Danville, Pennsylvania. Dr. Papadopoulos is rated as an Advanced provider by MediFind in Herniated Disc Surgery. His top areas of expertise are Scaphoid Non-Union, Diskitis, Kienbock's Disease, Microdiscectomy, and Herniated Disc Surgery.