Pfizer COVID-19 vaccine appointments are available to our patients. Sign up for Connect today to schedule your vaccination. Review the latest on COVID-19 vaccines.

GI Metabolic and Bariatric Surgery

At this time, we have adjusted many appointments to Video Visits. Please contact our office for any scheduling questions.
(646) 962-8462
Learn more about Video Visits

Find a Doctor

Browse Specialists

About Us

The Weill Cornell Medicine GI Metabolic and Bariatric Surgery Program is dedicated to providing the most advanced diagnostic and surgical techniques to help you to accomplish your individual health goals.

The decision about whether to undergo surgery is often complex and very personal, which is why our team of world-renowned surgeons and clinicians provide individualized care alongside the latest advances in medicine.

Our specialties include:

  • Laparoscopic and robotic bariatric surgery, which uses the most advanced techniques to perform weight loss surgery
  • Metabolic surgery, which aims to put type 2 diabetes into long lasting remission
  • Minimally invasive gastrointestinal surgery, which addresses a broad variety of disorders, ranging from hernias to problems that arise in the stomach, gall bladder, esophagus and intestine
  • Medical weight management:¬†intensive medical treatment for obesity including lifestyle counseling, individualized nutrition and physical activity recommendations, and medication management.

Our use of cutting-edge, minimally invasive methods means small incisions, a short hospital stay (if any), and a quicker recovery from your operation. All surgery is performed at NewYork-Presbyterian, the #1 hospital in New York City for 17 years in a row. 

In addition to our surgical expertise, we also offer nutritional guidance and support groups as part of our comprehensive approach.

Contact us today to schedule a consultation or to learn more about our services.


Read the latest on wellness and preventive care for the whole family

View All Posts


Dr. Gregory Dakin discusses Weill Cornell Medicine's minimally invasive approach, which results in less pain, shorter hospital stays and quicker recovery time.

What Our Patients Are Saying

Scott S.
Talking about Rasa Zarnegar, M.D.

"Dr. Zarnegar is my hero! Not that I have any medical expertise or experience but he is excellent all around and I highly recommend him if you need surgical care. Take it from someone who never had surgery in his entire life. I did plenty of research in my efforts to line up the right doctor at the right time to get a hernia repaired, one that I had been prolonging for years. I had consulted with nearly a half a dozen surgeons from the Eastern end of Long Island to NYC, from some of the top medical institutions. I always knew I had a right inguinal hernia, but among the consultations I had, Dr. Zarnegar was the only surgeon to identify that I had not just one but three hernias: left and right inguinal hernias plus an umbilical hernia. Only one other surgeon picked up on the umbilical hernia in addition to the right inguinal. Given the cost of healthcare today, can you imagine what the out-of-pocket expense would have been if I had to endure 3 separate surgeries rather than the one"

Jun 06, 2021
Source: Healthgrades
Magdalena Matos

"I loved the fact that I felt comfortable, safe and sound during my visit to the clinic with this world wide pandemic COVID19 that safety measures are still exercised, and keeping patients at a distant and also without hesitation during my visit with Dr. Cheguevara, Afaneh and nurses all showed their strong ethics, while privately keeping my matters confidential they were caring, kind and professional in addressing my health situations and quickly assigned a date for surgery to repair my belly hernia. Much appreciated. Thank you in advance."

May 23, 2021
Source: Google
Anthony Velez

"Very awesome he did my endoscopy turn out good he is great at explaining your situation to u he cares alot about his patience thanks doc...."

Oct 15, 2020
Source: Google
*Individual results may vary