Dr. Kenneth Kneessy

Dr. Kenneth C. Kneessy, M.D., is a board-certified plastic surgeon who has proudly served the Long Island community since 2000 aa a Partner at Suffolk Plastic Surgeons. Having lived his entire life in Suffolk County, Dr. Kneessy has deep roots in the community and considers it a privilege to have raised his family there.  

Dr. Kneessy earned his Doctor of Medicine degree from the State University of New York of New York at Buffalo in June1992. He began his residency in General Surgery that same year at New York Hospital Medical Center, where he served as Chief Resident during his final year. In 1997, he advanced his surgical training by completing fellowship at Westchester County Medical Center where he received specialized training in burns, plastic surgery and microsurgery. He subsequently completed a fellowship in plastic surgery at Temple University in Philadelphia, Pennsylvania.  

In June 2000, Dr. Kneessy returned to Long Island and began his career at Suffolk Plastic Surgeons. He has been certified by the American Board of Plastic Surgery since 2003. For more than two decades, he has dedicated his career to providing compassionate, high-quality plastic and reconstructive surgical care to patients throughout Long Island. 

Dr. Kneessy serves as a Clinical Assistant Professor of Surgery at the Renaissance School of Medicine at Stony Brook University. He holds hospital appointments at Stony Brook University Hospital, St. Charles Hospital, JT Mather Northwell Hospital, Good Samaritan Hospital, St. Catherines of Siena Hospital and NYU Langone Hospital- Suffolk. He also serves as Chief of Plastic Surgery at Mather Hospital, part of Northwell Health. 

Dr. Kneessy is an active member of several professional organizations, including the Aesthetic Society (formerly, ASAPS), the American Society of Plastic Surgeons (ASPS), the Northeastern Society of Plastic Surgeons and the New York Regional Society of Plastic Surgeons. He is also a Fellow of the American College of Surgeons (FACS).  

Beyond his medical practice, Dr. Kneessy is committed to giving back to his community. He is a member of Blanca’s House, a local not-for-profit organization of volunteer healthcare professionals. Through this organization, he donates his time and surgical expertise on missions, helping provide surgical care to individuals who might not otherwise have access to these services. He is also involved with Hope house Ministries, the Long Island Chapter of the National Multiple Sclerosis Society, and a recent philanthropic initiative to restore the historic St. James Theater.  

Outside the operating room, Dr. Kneessy enjoys drawing and painting the human form. His passion and aptitude for art played an important role in inspiring his career in plastic surgery. He also enjoys running, visiting Walt Disney World, and traveling with his wife and family.  

Dr. Kneessy recently relocated his practice to a state-of-the-art facility in East Setauket, featuring an ambulatory surgical suite and a dedicated medical spa treatment room.