Memorial Sloan Kettering doctors, including oncologists, surgeons, radiologists, pathologists, psychiatrists, and more, treat every cancer type and are part of your care team at MSK. To learn about our doctors, find a specialist near you, or make an appointment, please see our listings below. You can search by disease, location, department, treatment procedure, and language spoken.
Colorectal Surgeon & Clinical Geneticist
Mohammad Ali Abbass, MD, MPH
Assistant Attending Physician; Co-Lead, Inherited GI Cancer Genomics, Niehaus Center
Gastrointestinal Medical Oncologist
Deb Schrag, MD, MPH
Chair, Department of Medicine, George J. Bosl Chair at Memorial Sloan Kettering Cancer Center
Gastrointestinal Medical Oncologist
Ryan Sugarman, MD
Medical Site Director, MSK Nassau; Medical Director, Strategic Partnerships
Colorectal Surgeon
Martin R. Weiser, MD
Acting Chair, Department of Surgery; Vice Chair for Faculty Affairs, Department of Surgery; Stuart H.Q. Quan Chair in Colorectal Surgery