Dr. Peter E. Legnani, M.D.

Expert Publications

• Difficult differential diagnoses in IBD: ileitis and indeterminate colitis.
• Therapeutic options in the management of strictures in Crohn's disease.
• Predictors and outcome of gastrointestinal complications in patients undergoing cardiac surgery.
• Capsule endoscopy is superior to small-bowel follow-through and equivalent to ileocolonoscopy in suspected Crohn's disease.

Media Releases

Get to know Gastroenterologist Dr. Peter E. Legnani, who serves patients in New York, New York.

Repeatedly named as a top gastroenterologist on the Best Doctors and Super Doctors lists, Dr. Legnani tends to patients at Fifth Avenue GI located in Upper East Side, New York, New York. In addition to general gastroenterology and endoscopy, his major subspecialties include inflammatory bowel disease, colorectal cancer screening, and small bowel endoscopy.

The medical professionals of Fifth Avenue GI strive to provide patients with outstanding medical care for all of their gastrointestinal concerns. The practice specializes in the diagnosis and treatment of digestive diseases in adults, involving the esophagus, stomach, small and large intestines, rectum, liver, pancreas, and biliary system. Drs. Kornbluth, George, and Legnani are each renowned for their expertise in various aspects of gastroenterology, serving as endoscopic surgeons, teachers, and consultants in the GI field.

As for his academic career, Dr. Legnani graduated with a Bachelor of Science (BS) degree from the Columbia University School of Engineering and Applied Sciences in 1991, where he was inducted into Tau Beta Pi, the National Engineering Honor Society. Switching disciplines to medicine, his medical degree came through the University of Connecticut School of Medicine. Thereafter, he completed his residency in internal medicine and his fellowship in gastroenterology at Mount Sinai Medical Center, where he served as chief fellow in gastroenterology and was named Outstanding Teaching Fellow.

A member of the American Society for Gastrointestinal Endoscopy, the doctor is board-certified in gastroenterology by the American Board of Internal Medicine, a physician-led, non-profit, independent evaluation organization driven by doctors who want to achieve higher standards for better care in a rapidly changing world. 

Authoring over 30 papers, book chapters, and reviews, Dr. Legnani is a devoted teacher and mentor for students, residents, and fellows at Mount Sinai Medical Center. He is also a clinical investigator in multiple clinical trials with inflammatory bowel disease as part of the Inflammatory Bowel Disease Center at Mount Sinai.

Gastroenterology is the branch of medicine focused on the digestive system and its disorders. A gastroenterologist is a physician who has extensive training in the diagnosis and treatment of disorders related to the esophagus, stomach, small intestines, colon, liver, pancreas, and biliary system.

Recognized as an expert in his field, Dr. Legnani is the recipient of Compassionate Doctor Recognition (2010, 2011, 2012, 2013, 2015, 2016, 2018), Patients’ Choice 5th Anniversary Award (2012, 2013), Patients’ Choice Award (2008, 2009, 2010, 2011, 2012, 2013, 2018), and Top 10 Doctor – Neighborhood (2014), among others. 

Recommended Articles

• Anemia: Learning More About The Unfortunates

  Anemia is a medical condition in which the count of red blood cells in the blood is lower than the normal number. This can occur due to many reasons such as deficiency of some vitamin, iron or it can also be hereditary. It is one of the most common disorders of blood and there are reports suggesting...

• Blood in Your Stool: Where Does It Come From?

  Where does the bleeding come from?Bleeding that causes blood in the stool can develop in any part of the gastrointestinal tract....

• What Causes Gallstones?

  OverviewMany people with gallstones are not aware of their condition. Gallstones are hard substances that are formed in the gallbladder. They are mainly composed of cholesterol, bilirubin, and bile salts. The stones are of different sizes ranging from a sand particle to a golf ball.Symptoms of...

• Cooking Tips for a Crohn's Diet

  If you are suffering from Crohn’s disease, then you are aware that inflammation of your small intestine can make it more difficult for you to digest and absorb the proper nutrients you require. While there is no cure for Crohn’s disease, there are specific foods that may trigger flare-ups or...

• Learning to Cope with Celiac Disease and Gluten Sensitivity

  For a large sum of individuals around the world, living with a disease or any other type of severe health condition is hard.  Upon learning of the diagnosis, patients must face a life-changing experience, or they have dealt with it their entire life.  Whatever the condition may be, the...

• Orange Poop: A Sign of Celiac Disease?

  Children play what they like wherever they want. Likewise, they are known to eat anything that they can get their hands on. Kids are known to possess such curious, impulsive, and playful traits, which can be tolerated by most. Yet, when they feel unwell, things are never okay; like this one instance...