Andrew Duffy, MD, FACS, FASMBS

Associate Professor of Surgery (Gastrointestinal); Director, Bariatric and Metabolic Surgery Yale-New Haven Health System

Departments & Organizations

Gastrointestinal Motility Program

Obesity Research Working Group

Surgery: Bariatric Surgery Program | Gastrointestinal Surgery: Minimally Invasive & Bariatric Surgery; Yale Bariatric Surgery Program

Yale Medicine

Office of Cooperative Research


Andrew Duffy, MD, is a Board Certified General Surgeon and is fellowship-trained in minimal access surgery. He is the Director of Bariatric and Metabolic Surgery for the Yale-New Haven Health System. His goal is to offer the most effective surgery with the least recovery time and post-operative discomfort.

Dr. Duffy is dedicated to helping individuals with acute and chronic issues with their stomach, intestines, colon, gallbladder, or other abdominal organs. He specializes in all type of primary and recurrent abdominal wall and hiatal hernias. He has extensive experience at surgically treating colon cancer and diverticulitis using laparoscopic techniques.

He also specializes in laparoscopic procedures for obesity, including gastric bypass, sleeve gastrectomy, ajdustable gastric banding and revision of prior bariatric surgery.

He specializes in laparoscopic gastrointestinal surgery; laparoscopic colon surgery for colon cancer or diverticulitis; laparoscopic bariatric surgery for morbid obesity; laparoscopic gastric bypass surgery; laparoscopic adjustable gastric banding; laparoscopic sleeve gastrectomy; revisional bariatric surgery; laparoscopic surgery for reflux and achalasia; laparoscopic Nissen, laparoscopic Heller myotomy; laparoscopic splenectomy; laparoscopic paraesophageal hernia repair; laparoscopic repair of abdominal-wall hernias; laparoscopic repair of inguinal hernias; gall bladder; gall stones; cholecystectomy; gall stone pancreatitis; Gastroesophageal Reflux Disease (GERD); Inflammatory Bowel Disease (IBD); Crohn's disease; ulcerative colitis; appendicitis; gastroparesis.

Education & Training

MD University of Massachusetts Medical School (1996)
BS Boston College (1992)
Clinical Fellow Weill Medical College of Cornell University
Chief Resident University of Massachusetts Medical School
Resident University of Massachusetts Medical School
Board Certification AB of Surgery, Surgery, General (2004, recertified: 2013)

Honors & Recognition

  • New York Magazine Best Doctors 2012, New York Magazine (2017)

  • Connecticut Magazine Top Docs 2017, Connecticut Magazine (2017)

  • Connecticut Magazine Top Docs 2016Connecticut Magazine (2016)

  • Connecticut Magazine Top Docs 2015Connecticut Magazine (2015)

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Contact Info

Andrew Duffy, MD, FACS, FASMBS
Patient Care Locations
Gastrointestinal and Bariatric SurgeryTemple Medical Center
40 Temple Street, Ste Suite 7B

New Haven, CT 06510
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Yale Minimally Invasive and Bariatric SurgeryYale Minimally Invasive and Bariatric Surgery
2000 Post Road, Ste 101

Fairfield, CT 06824
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Mailing Address
40 Temple Street
New Haven, CT 06520-8062

Curriculum Vitae