Garrett M. Nash, MD, MPH

Garrett M. Nash, MD, MPH

I am a surgeon with specialized training in cancers of the colon, rectum, anus, appendix, and peritoneum. The focuses of my practice include minimally invasive techniques for colorectal cancer (including laparoscopy, single-incision laparoscopy, and robotic surgery), avoiding colostomy while preserving bowel, bladder, and sexual function, and the management of peritoneal surface malignancies (including pseudomyxoma peritonei and mesothelioma).

My clinical research involves prospective clinical trials of new technology and surgical techniques for advanced colorectal, appendiceal, and peritoneal malignancies, as well as optimizing surgical margins and lymph node retrieval for colon and rectal cancers.  I am the primary investigator for the ICARuS Trial (Intraperitoneal Chemotherapy After cytoReductive Surgery). This is a randomized clinical trial investigating the benefit of intraperitoneal chemotherapy for metastatic appendiceal and colorectal cancer.  It will be the first-ever prospective trial with the primary goal of measuring the efficacy of intraperitoneal chemotherapy for appendix cancer worldwide and the first randomized trial of intraperitoneal chemotherapy for colorectal cancer in the United States.

Appointments for New Patients
Clinical Expertise

Gastrointestinal Cancers: primary and recurrent colon, rectal, anal, and appendix cancers; carcinoid; peritoneal surface malignancies; pseudomyxoma peritonei; mesothelioma. Laparoscopic Surgery for Colorectal Tumors: single-incision laparoscopy for early-stage colon cancer; robotic colorectal surgery, endoscopic and minimally invasive removal of large polyps. Preservation of bowel, bladder, and sexual function in patients with rectal cancer. Clinical trials in surgery.

Languages Spoken

MD, Columbia University College of Physicians and Surgeons; MPH, Harvard School of Public Health


University of Massachusetts Medical Center; NewYork- Presbyterian Hospital/Weill Cornell Medical Center


NewYork-Presbyterian Hospital/Columbia and Cornell; Memorial Sloan Kettering Cancer Center

Board Certifications

Surgery, Colon and Rectal Surgery

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Publications by Garrett M. Nash
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