MSK Rockville Centre is proud to have served the residents of Nassau County and surrounding communities since 1997. Staff and services have relocated to MSK Nassau in Uniondale, as of Monday, April 8, located 4 miles away. The freestanding outpatient facility offers expanded services and is home to more than 20 MSK doctors whose sole focus is caring for people with cancer. For general information, call Memorial Sloan Kettering at 212-639-2000, 24 hours a day, seven days a week. To make an appointment, call us at 800-525-2225, Monday through Friday between 8:30 AM and 5:30 PM ET.