WMCHealth Physicians Heart and Vascular Institute, located in Mammaroneck, NY, provides a multi-specialty practice with physicians in cardiology, cardiovascular surgery, cardiothoracic surgery and pediatric cardiovascular services. WMCHealth Physicians Heart and Vascular Institute is a member of the Westchester Medical Center Health Network (WMCHealth), a 1,700-bed healthcare system headquartered in Valhalla, New York, with 10 hospitals on eight campuses spanning 6,200 square miles of the Hudson Valley.