Dr. Aaron Walfish is Board-Certified in Internal Medicine and Subspecialty Board Certified in Gastroenterology. He has an active practice in gastroenterology, hepatology, and gastrointestinal endoscopy. He is on staff at The Mount Sinai Medical Center and Elmhurst Hospital Center.

He is a Fellowship Director for a Board Certified Gastroenterology Fellowship. He has co-authored multiple articles in peer-reviewed journals and co-written chapters in internationally renowned textbooks. See CV.

Dr. Walfish is a medical consultant and medico-legal expert witness for both defense and plaintiff. He is proficient in simplifying intricate medical topics for juries and laymen.