Nishan Rajaratnam, MD, is an infectious disease specialist. His primary clinical interests include transplant-related infections, oncology-associated infections, complex orthopedic infections, invasive fungal diseases, and the management of immunocompromised patients. Dr Rajaratnam earned his MD from All Saints University School of Medicine. He completed his internal medicine residency at Hackensack Meridian Health – Palisades Medical Center, followed by an infectious disease fellowship at University Hospital in Newark. He is board certified in infectious disease and internal medicine by the American Board of Internal Medicine. He joined the Englewood Health Physician Network in 2025.