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

• What Is Traveler's Diarrhea?

  Traveler’s diarrhea is an infection of the stomach or intestine caused by consuming contaminated food and water. This travel-related infection is commonly seen in developing countries. Traveler's diarrhea is also known as Turista, Delhi Belly, and Montezuma's Revenge in other parts of the world....

• Everything to Know About Celiac Disease

  There are many types of people who have allergies or are sensitive to certain foods. One of these allergies or sensitivities is gluten. Those who are sensitive to gluten are diagnosed with Celiac disease, which has a vast history that makes it a commonly known condition. But how exactly did Celiac...

• New Cannabis Patch for Celiac Disease Related Neuropathy

  Recently researchers have developed a patch that contains extracts from cannabis to treat painful peripheral neuropathy related to various disorders, including celiac disease.Celiac disease is an autoimmune disease, which is a condition within the immune system that turns against some of the body's...

• Elisabeth Hasselbeck Raises Awareness of Celiac Disease

  For some, the first time they heard much about the term "Gluten-free" was from Elisabeth Hasselbeck, who was formerly on The View. She also was a hardcore player on the show Survivor, inspiring many across the nation. Some didn't understand what celiac disease really was when she spoke about it, but...

• Reasons Why You Need a Biopsy

  OverviewA biopsy is a procedure that involves the removal of a sample tissue in the body to examine it closely under a microscope. The tissue is mainly examined to diagnose a certain disease. Some may use a needle or surgical methods to remove any lumps or suspicious nodules in the body. Some...

• What Are the Most Obvious Symptoms of Appendicitis?

  Appendicitis is a condition that causes the inflammation of the appendix. The appendix is a tube around 3½ inch long and extends from the large intestine. It is said that the appendix has a role in gut immunity, but nothing as yet is definite with regard to its function. An individual can live...