Andrew J. Duffy, MD


Bariatric Surgery, General Surgery

Conditions & Treatments

Achalasia, Appendectomy, Bariatric Medicine (Weight Loss), Bariatric/Weight Loss Surgery, Colon Cancer, Crohn's Disease, Diverticulitis, Gall Stone Pancreatitis, Gastric Bypass, Gastroesophageal Reflux Surgery, Gastrointestinal Cancer, Gastroparesis, Inflammatory Bowel Diseases (IBD), Laparoscopic Anti-reflux Surgery, Laparoscopic Appendectomy, Laparoscopic Bariatric Surgery, Laparoscopic Cholecystectomy, Laparoscopic Colon Surgery, Laparoscopic Heller Myotomy, Laparoscopic Hernia Repair, Laparoscopic Inguinal Hernia Repair, Laparoscopic Nissen Fundoplication, Laparoscopic Splenectomy, Minimally Invasive Procedure, Minimally Invasive Surgery, Morbid Obesity Surgery, Ulcerative Colitis

(203) 785-6060
Accepting New Patients
Telehealth Visits


Andrew Duffy, MD, is a board certified general surgeon and is fellowship-trained in minimal access surgery. He is associate surgical chief of the Digestive Health Service Line for Yale New Haven Health System (YNHHS) and director of the YNHHS Hernia Program. 

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, adjustable 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.





Affiliated With

Yale Medicine


Yale Bariatric & Minimally Invasive Surgery

40 Temple Street
Suite 7B
New Haven, CT 06510

Get Directions

Monday9:00 AM - 5:00 PM
Tuesday9:00 AM - 5:00 PM
Wednesday9:00 AM - 5:00 PM
Thursday9:00 AM - 5:00 PM
Friday9:00 AM - 5:00 PM
(203) 785-6666

Yale Bariatric & Minimally Invasive Surgery

2000 Post Road
Suite 101
Fairfield, CT 06824

Get Directions

(203) 418-9530

Shoreline Surgery Center

111 Goose Lane
Shoreline Medical Center
Guilford, CT 06437

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Education & Training


University of Massachusetts Medical School


University of Massachusetts Medical School


Weill Medical College of Cornell University

Accepted Insurance

Insurance coverage regularly changes, please contact the doctor’s office directly to verify that your specific insurance plan is accepted.

  • aetna
  • anthem bc/bs
  • berkeley care network
  • cigna healthcare
  • community care network
  • connecticare
  • corvel
  • first health network
  • focus healthcare
  • great west
  • husky
  • medicaid
  • medicare
  • multiplan
  • oxford health plans
  • railroad medicare
  • tricare/champus
  • united healthcare
  • us family health plan
  • wellcare