Narcis Aron, MD

The board-certified nephrology specialists at Optum have extensive experience treating a broad range of conditions including hypertension, kidney stones, electrolyte and acid-base disorders, hemodialysis and peritoneal dialysis. With an office conveniently located in Mount Kisco, NY, our physicians can provide a range of diagnostic testing and treatment services including dialysis, renal disease and post-kidney transplant. Optum accepts most major health plans.

Dr. Katherine Rosenwasser is the Chief of Pediatric Orthopedic Trauma at Columbia University Irving Medical Center (CUIMC) / Morgan Stanley Children's Hospital of New York (MSCHONY). She is an expert in the operative and non-operative treatment of lower extremity deformity and musculoskeletal trauma in pediatric patients – from infants to adolescents. Her practice focuses on caring for children with limb-length discrepancies, clubfoot, congenital deformities, and those requiring complex lower extremity reconstructive surgeries. Dr. Rosenwasser’s advanced training allows her to leverage the latest surgical techniques and non-operative therapies to provide life-altering interventions for young patients. After receiving her medical degree from Columbia University’s Vagelos College of Physicians & Surgeons, Dr. Rosenwasser remained at Columbia University Irving Medical Center and NewYork-Presbyterian where she completed residency training in orthopedic surgery, serving as executive chief resident. Following her residency, Dr. Rosenwasser completed dual fellowships in pediatric orthopedic surgery at the Hospital for Sick Children in Toronto, and pediatric limb lengthening and reconstruction under the direction of Dr. John Herzenberg at the Sinai Hospital’s Ruben Institute for Advanced Orthopedics in Baltimore, Maryland. Dr. Rosenwasser is an active member of the academic orthopedic community, both as a member of numerous national organizations and as an active researcher with a variety of ongoing research projects focused on improving patient outcomes for children who require complex orthopedic care.