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Dr. Ali Khalessi, MD

Dr. Ali Khalessi, MD

Gastroenterologist
55 W 17th St, New York, NY
Dr. Ali Khalessi is a highly rated, double board-certified gastroenterologist and attending physician at Manhattan Gastroenterology, and a member of the faculty at NewYork-Presbyterian/Weill Cornell Medical Center. Trained at NYU Grossman School of Medicine and NYU Langone Medical Center, he combines the rigor of academic medicine with a warm, unhurried approach to patient care. During his gastroenterology fellowship at Rutgers New Jersey Medical School, he was selected to serve as Chief Fellow, a role reserved for physicians who show exceptional clinical judgment and leadership. A highly skilled endoscopist, Dr. Khalessi performs thousands of procedures each year, including screening and diagnostic colonoscopy, upper endoscopy, esophageal dilation, and hemorrhoid treatment. He has a special interest in inflammatory bowel disease and has cared for a large panel of patients with Crohn’s disease and ulcerative colitis on advanced biologic therapies. He also treats GERD, Barrett’s esophagus, fatty liver disease, IBS, and other digestive conditions, and offers comprehensive colon cancer screening. His research spans inflammatory bowel disease, liver disease, esophageal disorders, and young-onset colorectal cancer. His work has appeared in the Journal of Clinical Gastroenterology, Clinics in Liver Disease, Gastro Hep Advances, and Gastroenterology, and he has presented at national meetings of the American College of Gastroenterology and the American Gastroenterological Association. Dr. Khalessi believes great care starts with listening. He takes the time to explain each diagnosis and treatment option clearly and partners with his patients to build a plan that fits their lives. His expertise, compassion, and dedication have earned him an excellent reputation among patients and colleagues in New York City. Dr. Khalessi looks forward to meeting you!
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About Dr. Ali Khalessi

Dr. Ali Khalessi is a highly rated, double board-certified gastroenterologist and attending physician at Manhattan Gastroenterology, and a member of the faculty at NewYork-Presbyterian/Weill Cornell Medical Center. Trained at NYU Grossman School of Medicine and NYU Langone Medical Center, he combines the rigor of academic medicine with a warm, unhurried approach to patient care. During his gastroenterology fellowship at Rutgers New Jersey Medical School, he was selected to serve as Chief Fellow, a role reserved for physicians who show exceptional clinical judgment and leadership. A highly skilled endoscopist, Dr. Khalessi performs thousands of procedures each year, including screening and diagnostic colonoscopy, upper endoscopy, esophageal dilation, and hemorrhoid treatment. He has a special interest in inflammatory bowel disease and has cared for a large panel of patients with Crohn’s disease and ulcerative colitis on advanced biologic therapies. He also treats GERD, Barrett’s esophagus, fatty liver disease, IBS, and other digestive conditions, and offers comprehensive colon cancer screening. His research spans inflammatory bowel disease, liver disease, esophageal disorders, and young-onset colorectal cancer. His work has appeared in the Journal of Clinical Gastroenterology, Clinics in Liver Disease, Gastro Hep Advances, and Gastroenterology, and he has presented at national meetings of the American College of Gastroenterology and the American Gastroenterological Association. Dr. Khalessi believes great care starts with listening. He takes the time to explain each diagnosis and treatment option clearly and partners with his patients to build a plan that fits their lives. His expertise, compassion, and dedication have earned him an excellent reputation among patients and colleagues in New York City. Dr. Khalessi looks forward to meeting you!

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In-network insurances

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Popular visit reasons

Abdominal Pain
Colonoscopy
Diarrhea
Gallstones
Gastroenterology Consultation
Gluten Sensitivity
Hemorrhoids
Pancreas Problem
Abdominal Pain
Colonoscopy
Diarrhea
Gallstones

Office location

17th Street
55 W 17th St, New York, NY 10011
Get directions

Education and background

Practice names

Hospital affiliations

  • New York-Presbyterian Hospital / Weill Cornell Medical Center

Board certifications

  • American Board of Internal Medicine (ABIM)
  • Gastroenterology (American Board of Internal Medicine)

Education and training

  • Medical School - New York University, Doctor of Medicine
  • Rutgers Robert Wood Johnson Medical School, Fellowship in Gastroenterology
  • NYU Grosssman School of Medicine, Residency in Internal Medicine

Professional memberships

  • American College of Gastroenterology
  • Americal Society for Gastrointestinal Endoscopy
  • American Gastroenterological Association

Awards and publications

  • Chief Gastroenterology Fellow
  • Cum Laude Honors Recipient- Engineering Majors
  • SURP Award for Research

Languages spoken

  • English

Provider's gender

Male

NPI number

1093204307

Patient reviews

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Frequently asked questions

How soon can I make an appointment with Dr. Ali Khalessi?

Generally, Dr. Ali Khalessi has appointments available on Zocdoc within 1 week. You can see Dr. Khalessi's earliest availability on Zocdoc and make an appointment online.

Is Dr. Ali Khalessi accepting new patients?

Dr. Ali Khalessi generally accepts new patients on Zocdoc. You can see Dr. Khalessi's earliest availability on Zocdoc and schedule an appointment online.

Does Dr. Ali Khalessi accept my insurance?

Choose your insurance plan to verify if Dr. Khalessi is in-network.

Can I make an appointment with Dr. Ali Khalessi online?

Yes, you can make an appointment online with Dr. Khalessi using Zocdoc. It’s simple, secure, and free.

Which hospital is Dr. Ali Khalessi affiliated with?

Dr. Ali Khalessi is affiliated with New York-Presbyterian Hospital / Weill Cornell Medical Center.

What practice does Dr. Ali Khalessi work with?

Where is Dr. Ali Khalessi's office located?

Dr. Ali Khalessi's office is located at 55 W 17th St, New York, NY 10011.

Which board certifications does Dr. Ali Khalessi have?

Dr. Ali Khalessi is certified by American Board of Internal Medicine (ABIM) and Gastroenterology (American Board of Internal Medicine).

What are common reasons for patients to see Dr. Ali Khalessi?

Dr. Ali Khalessi frequently sees patients for Abdominal Pain, Colonoscopy, Diarrhea, Gastroenterology Consultation, and Hemorrhoids. You can see other visit reasons for Dr. Ali Khalessi on their profile.

What languages does Dr. Ali Khalessi speak?

Dr. Ali Khalessi speaks English.

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