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David Hass, M.D.

Dr. Hass practices in our Hamden and Milford offices. He is affiliated with Milford Hospital, Yale-New Haven Hospital’s York Street campus and Yale-New Haven Hospital Saint Raphael campus.


Dr. Hass is a native of Philadelphia. He attended Cornell University, where he graduated with a Bachelor’s degree in Biology and a Master’s degree from Weill Medical College. From there, he completed his Internship and Residency in Internal Medicine at the Hospital of the University of Pennsylvania. After completing his Internal Medicine Residency, Dr. Hass joined the Montefiore Medical Center at the Albert Einstein College of Medicine in New York, where he completed his Gastroenterology Fellowship.

Dr. Hass joined Gastroenterology Center of Connecticut in 2007. He serves as medical director for the Endoscopy Center of Connecticut. His special interests include inflammatory bowel disease, disorders of the liver and biliary tract, pancreatic diseases and complementary and alternative therapies in the treatment of gastrointestinal and hepatic disease.

Read Dr, Hass' whitepaper: "Turning Physicians into Leaders" >


  • Weill Medical College of Cornell University, 2001, M.D.
  • Cornell University, 1996, B.A., Biology

Board Certifications

  • Board Certified in Gastroenterology, 2004
  • Board Certified in Internal Medicine, 2007

Post Graduate Training

  • Gastroenterology Fellowship, 2007, Montefiore Medical Center, Albert Einstein College of Medicine
  • Internal Medicine Residency, 2004, Hospital of the University of Pennsylvania

Professional Memberships

  • Diplomat, American Board of Internal Medicine
  • American College of Gastroenterology
  • American Gastroenterological Association
  • American Society for Gastrointestinal Endoscopy


  • Capsule Endoscopy*
  • Celiac Disease
  • Colon Capsule*
  • Colorectal Cancer Screening
  • Complementary Therapies / Hypnotherapy*
  • Crohn’s Disease and Colitis
  • Eosinophilic Esophagitis
  • Irritable Bowel Syndrome
  • Liver Disorders (including Hepatitis)*
  • Pancreatic Disease
  • Reflux / Barrett’s Esophagus / Gastroesophageal Reflux Disease
  • Small Bowel Diseases*
  • *special interests


  • English