MSK patient Jason Weiner, pictured hiking with his family in Alaska, was one of more than 11,000 people who traveled to MSK for care in 2025. Memorial Sloan Kettering Cancer Center (MSK) has always been a neighborhood hospital, focused on caring for New York City residents since welcoming its first patients in Manhattan, in 1887. Over the decades, MSK’s community has expanded to include the surrounding region, with locations on Long Island and in New Jersey and Westchester County.