Our Experts

Ziad N. Kronfol, MD, FACS, FASCRS

Director of the Department of Surgery and Chief, Division of Colon and Rectal Surgery

Dr. Kronfol is a double board-certified and fellowship-trained surgeon practicing at Highland Medical, Highland Surgical Associates in West Nyack, NY. Dr. Kronfol received his board certification in both general surgery and colon and rectal surgery from the American Board of Surgery and the American Board of Colon and Rectal Surgery, respectively. He specializes in anorectal surgical procedures, laparoscopic and robotic minimally invasive colon and rectal surgery, transanal minimally invasive surgery, endoscopy procedures, as well as general surgery. He is passionate about providing excellent surgical care to the residents of Rockland, Westchester and Bergen counties using the latest surgical techniques and technology.

Dr. Kronfol earned his medical doctorate from the American University of Beirut Medical Center in Beirut, Lebanon. He completed his General Surgery internship at Vanderbilt University Medical Center in Nashville, TN and his General Surgery Residency at Texas Tech University Health Science Center in El Paso, TX. Dr. Kronfol completed his Fellowship in Colon and Rectal Surgery at Mount Sinai St. Luke’s Roosevelt Hospital Center in New York, NY.

He is a member of the American Society of Colon and Rectal Surgeons, the Society of American Gastrointestinal and Endoscopic Surgeons, and the American College of Surgeons. Dr. Kronfol has presented at many academic conferences and seminars and has several publications.

William P.Semanczuk, MD

William P. Semanczuk, MD, Director of Department of Anesthesia at Montefiore Nyack Hospital

William P. Semanczuk, MD is a board-certified anesthesiologist with extensive experience in hospital and ambulatory centers. He received his medical doctorate from the University of Medicine and Dentistry of New Jersey in Newark, NJ, completed his internship at St. Luke's-Roosevelt Hospital Center and his residency in Anesthesiology at Columbia Presbyterian Medical Center, both in New York, NY. De. Semanczuk is the Director of the Department of Anesthesiology at Montefiore Nyack Hospital, an Adjunct Clinical Assistant Professor at Touro College of Osteopathic Medicine and a member of the American College of Healthcare Executives, the American Society of Anesthesiologists and the New York State Society of Anesthesiologists.