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Online SchedulingAbout Dr. Pasternack is a fellowship-trained foot and ankle surgeon who specializes in all aspects of non-surgical and surgical care of foot and ankle injuries and conditions. He treats all conditions of the foot and ankle including but not limited to ankle and foot arthritis, Achilles ruptures, tendonitis, fractures, bunions, hammertoe, ankle sprains, heel pain, […]
Archives: Providers
Andrew Pao
About Andrew Pao, MD, is a fellowship-trained, board-certified orthopedic surgeon whose practice focuses on the operative and non-operative care of a variety of foot and ankle conditions. His expertise includes treatment for arthritis of the foot and ankle; sports and cartilage injuries; trauma and fracture management of the lower extremity; bunions and forefoot pain; ankle […]
Marc Otten
About Dr. Marc Otten is a fellowship-trained, board-certified neurosurgeon who specializes in treating disorders and injuries of the brain and spine, both non-surgically and surgically. He also currently serves as Assistant Professor of Neurosurgery at Columbia University Medical Center. His research and sub-specialty training focus is on brain tumors and his work with patients with […]
Seth R. Miller
About Dr. Miller has performed over 1,800 total shoulder and reverse shoulder replacement surgeries during his more than 30 years in practice. He was one of the first shoulder surgeons in the state to perform the reverse shoulder replacement procedure, which has been the most significant breakthrough in shoulder replacement surgery. Dr. Miller’s research on […]
Robert Merrill
About Robert Merrill, MD, is a fellowship-trained orthopedic spine surgeon who specializes in all aspects of non-surgical and surgical care of the adult and pediatric spine. Dr. Merrill treats conditions of the cervical, thoracic, and lumbar spine including traumatic spinal injuries, spinal deformity, tumors, infection, and degenerative spine conditions. Dr. Merrill always takes an initial […]
Alex Levchenko
About Dr. Alex Levchenko is a board-certified, fellowship-trained physiatrist specializing in the non-operative management of spine, joint, and musculoskeletal pain. He is also certified in Regenerative Medicine in Interventional Pain Management by the American Board of Interventional Pain Physicians (ABIPP). Dr. Levchenko has advanced expertise in image-guided interventional procedures and innovative treatments aimed at relieving pain and restoring […]
Melissa LaRusso
About Melissa LaRusso, DO is a board-certified Rheumatologist who specializes in the diagnosis and treatment of rheumatic diseases with a particular interest in inflammatory arthritis including rheumatoid arthritis, psoriatic arthritis, and ankylosing spondylitis. Dr. LaRusso sees patients at the ONS offices in Greenwich and Stamford. Dr. LaRusso graduated from St. John’s University in Jamaica, NY, […]
David L. Kramer
About Dr. David Kramer specializes in the surgical treatment of spinal disorders including revision spinal surgery, correction of adolescent and adult spinal deformity, and minimally invasive management of spinal stenosis, disc herniations, spondylolisthesis, spinal trauma and tumors. Despite being recognized for his successful surgical outcome, he has built his reputation on his conservative approach. Dr. Kramer earned his medical […]
Tamar Kessel
About Tamar Kessel, MD is a fellowship trained and board certified physiatrist who specializes in non-operative treatments of musculoskeletal injuries such as PRP (Platelet Rich Plasma), viscosupplementation, and steroidal medications. Dr. Kessel is board-certified in physical medicine and rehabilitation and subspecialty certified in sports medicine Dr. Kessel has a special interest in the use of […]
Jeffrey Heftler
About Jeffrey Heftler, MD, is an interventional physiatrist who specializes in spinal injections and other non-operative treatments for spinal and musculoskeletal disorders. Interventional physiatry is a branch of medicine focused on treating pain through precisely placed anti-inflammatory injections into the spine and pelvis, guided by specialized x-ray technology. At ONS, these procedures are performed in […]