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Our Faculty


  • Division Chief

    Associate Professor of Surgery (Colon and Rectal); Surgical Director of Inflammatory Bowel Disease Program, Gastrointestinal Surgery; Chief of Colon and Rectal Surgery, Surgery

    Vikram Reddy, MD, PhD, MBA is chief of Colon and Rectal Surgery at Yale School of Medicine. He is a fellowship-trained colon and rectal surgeon. His goal is to help individuals have managed relief from chronic inflammatory bowel disease and its painful symptoms. He has extensive experience in the laparoscopic and robotic management and screening of anorectal cancer. He specializes in advanced laparoscopic management of colon and rectal diseases; screening and laparoscopic management of colon cancer; screening and management of rectal cancer (including laparoscopic or robotic sphincter preserving surgery and Transanal Endoscopic Microsurgery (TEMS); laparoscopic and robotic management of complicated or uncomplicated diverticulitis; management of inflammatory bowel disease (including laparoscopic bowel resection and ostomy, laparoscopic or robotic proctocolectomy, and J-pouch for ulcerative colitis); laparoscopic or robotic management of polyposis syndromes and disorders of continence.


  • Assistant Professor of Surgery (Colon and Rectal; Director, Colon and Rectal Surgery, Bridgeport

    Dr. Amit Khanna is an Assistant Professor in the Yale School of Medicine Department of Surgery. He serves as Director of Colon and Rectal Surgery for the Bridgeport region, and is responsible for leading the provision of colorectal surgical services across the area, in collaboration with the Digestive Health service line and Smilow Cancer Hospital Network teams. Dr. Khanna has more than 20 years of experience as a high-volume surgeon, specializing in the minimally invasive treatment and management of inflammatory bowel disease, colorectal malignancy, and anorectal diseases.
  • Assistant Professor of Surgery (Colon and Rectal); Assistant Professor, Biomedical Informatics & Data Science; Clinical Member, Cancer Prevention and Control Program - Yale Cancer Center; Clinical Fellow, Clinical Epidemiology Research Center (CERC)

    Dr. Leeds is an Assistant Professor in the Department of Surgery's Division of Colon & Rectal Surgery. His clinical practice broadly covers benign and malignant diseases of the colon, rectum, and anus. In addition, he leads a clinical research lab focused on identifying and optimizing modifiable risk factors of abdominal surgery. After obtaining an undergraduate degree at Princeton, Dr. Leeds taught high school science in Memphis, Tennessee with Teach For America. Dr. Leeds then went on to medical school at Emory University and completed clinical training in general surgery at The Johns Hopkins Hospital. He then finished subspecialty training in colon and rectal surgery at the Cleveland Clinic in Cleveland, Ohio. Along with his clinical training, Dr. Leeds has also obtained additional post-graduate degrees in business administration at the University of Oxford and clinical investigation at Johns Hopkins Bloomberg School of Public Health.
  • Professor of Surgery (Colon and Rectal Surgery); Chief, Section of Gastrointestinal Surgery; Director, Colon and Rectal Surgery; Director of Surgical Education

    Walter E Longo, MD, MBA , FACS, FASCRS, Is one of five Yale surgeons who is board-certified specifically in colorectal cancer. He earned his medical degree from New York Medical College. He is fellowship trained and is a Board Certified General Surgeon and a Board Certified Colon and Rectal Surgeon. Dr. Longo is committed to providing patients with the highest standards for the diagnosis and medical and surgical management of the diseases of the colon, rectum, and anus using minimally invasive techniques. Watch a video with Dr. Walter Longo >>He specializes in screening and management of colon cancer; rectal cancer; anal cancer; sphincter preserving surgery; transanal removal of cancer; diverticulitis; inflammatory bowel disease; stricturoplasty; bowel resection; ostomy; polyposis syndromes and adenomatous polyps; hemorrhoids; fissures; fistulas; anal abscesses; disorders of continence; and pelvic floor disorders.
  • Assistant Professor of Surgery (Colon and Rectal); Co-Chair, Lower GI Tumor Board; Co-Director of the CRC Program, Surgery

    Dr. Anne Mongiu is an Assistant Professor in the Department of Surgery, whose clinical interests span the breadth of benign and malignant colon, rectal, pelvic and anal surgery. She completed her medical and doctoral degrees at Northwestern University, where her research was focused upon understanding mechanisms of cell motility. She completed her residency in General Surgery at Brigham and Women’s Hospital/Harvard Medical School, and then pursued a fellowship in Colon and Rectal Surgery at the University of Louisville, where she focused on minimally invasive (robotic) techniques for treating IBD, diverticular disease, and colorectal cancer.
  • Assistant Professor of Surgery (Colon and Rectal)

    Dr. Haddon Pantel, MD, is a fellowship trained colorectal surgeon. He treats benign, inflammatory, and cancerous diseases of the colon, rectum, and anus, including such problems as colon cancer, rectal cancer, diverticulitis and inflammatory bowel disease. He earned his medical degree from the University of Vermont followed by a General Surgery Residency at Lahey Clinic, and he subsequently completed fellowship training in Colon and Rectal Surgery at the Lahey Clinic as well. He is a Fellow if the American College of Surgeons and is board certified in both General Surgery and Colon and Rectal Surgery.
  • Instructor of Clinical Surgery (Colon and Rectal); Medical Director of Colorectal Surgery, Colorectal Surgery

    Dr. Yavorek is a Clinical Instructor in Surgery and has over 25 years of clinical experience and resident training in New Haven. He graduated from Jefferson Medical College and served his surgical residency at Monmouth Medical Center in Long Branch, NJ and his colon and rectal surgery fellowship at Grant Medical Center in Columbus ,OH. Dr. Yavorek is board certified by the American Board of Surgery and the American Board of Colon and Rectal Surgery and is a fellow of both organizations. Most recently he was Site Director of Colon and Rectal Surgery at the St. Raphael's Campus of YNHH and he has assumed the role of Medical Director of Colon and Rectal Surgery at Lawrence and Memorial Hospital. He specializes in benign and malignant diseases of the colon, rectum and anus and has been performing minimally invasive colorectal surgery for 25 years with a special interest in robotic surgery for colon and rectal cancers.