Weight Loss (Bariatric) Surgery

Yale New Haven Hospital offers a comprehensive weight-loss program for the patient with morbid obesity — from pre-operative treatment to post-surgical strategies for maintaining health. Led by a dedicated team of experts in medicine, nursing, nutrition, psychology and surgery, our Bariatric Surgery Program is recognized for its safety, efficiency, sensitivity and expertise.

About Weight Loss Surgery

About one-third of adults in the U.S. are considered obese, according to the most recently available statistics from the Centers for Disease Control and Prevention (CDC). When overweight reaches the stage where it affects your health and causes or worsens certain health issues, it is considered "morbid" or disease-causing obesity. A ratio of weight to height called Body Mass Index BMI is generally used to classify the degree of overweight. An individual is considered to have morbid obesity at a BMI of 40 or at 35 if health problems such as diabetes, high blood pressure or obstructive sleep apnea are also present.

Obesity isn't simply a result of overeating. There are many contributing factors such as genetics, environmental, physiologic, metabolic and certain medications. Studies have demonstrated that dieting and exercise programs have a limited long-term success in individuals with morbid obesity.

Weight-loss surgery has been shown to be the most effective treatment of morbid obesity. Weight-loss surgery and healthy lifestyle changes can result in significant weight loss and health improvement.

Our physicians conduct free seminars throughout the year to give potential patients and their families information on the latest advances in weight-loss surgery, as well as the services provided at Yale New Haven Hospital. 

Available Procedures

Yale New Haven Hospital offers two different, minimally invasive (i.e. laparoscopic) bariatric operations. In addition, revisions of previous weight-loss surgery procedures are performed.  

Learn more about the innovative weight-loss procedures performed at YNNH

Why Choose YNHH

Patients at Yale New Haven Hospital benefit from a dedicated bariatric surgery team led by world-class surgeons and medical caregivers specializing in all facets of weight-loss surgery. All follow standardized protocols to provide consistent, compassionate care and support for the weight-loss patient.


Accredited as a “Comprehensive Center with Adolescent Qualifications” under MBSAQIP

The bariatric surgery program at Yale New Haven Hospital (YNHH) has been accredited as a Comprehensive Center with Adolescent Qualifications under the Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP) administered jointly by the American College of Surgeons and the American Society of Metabolic and Bariatric Surgery. This designation means that YNHH has met the essential criteria that ensure it is fully capable of supporting a bariatric surgery care program and that its institutional performance meets the requirements outlined by the MBSAQIP Accreditation Program.

Designation as a “Comprehensive Center with Adolescent Qualifications” provides confirmation that a bariatric surgery center has demonstrated its commitment to providing the highest quality care for its bariatric surgery patients of all ages.

Clinical Team

Our bariatric surgery team is recognized for its expertise and innovation. Each surgeon is fellowship-trained in minimally invasive, bariatric surgery. In fact, our surgeons teach laparoscopic techniques to other physicians around the country. They are also well known for their research, uncovering new approaches to weight loss surgery that may benefit patients in the future.

Yale New Haven bariatric surgery physicians are recognized for their expertise and innovation. In fact, they have taught laparoscopic techniques to other surgeons around the country. In addition to being recognized for their surgical skill, YNHH bariatric surgeons are also well known for their research, uncovering new approaches to weight loss surgery that may benefit patients in the future.

Is Bariatric Surgery right for you?

Most weight loss programs are based on diet, exercise and behavior change. For the morbidly obese individual, these methods alone most often are not enough to cause substantial weight loss and health improvement, or to help maintain weight loss that does occur. New research has shown that the body often resists weight loss efforts for underlying hormonal and metabolic reasons, with a “set point” that often keeps the individual at an overweight level despite efforts to lose weight.

Weight-loss surgery has been shown in studies to interrupt these metabolic patterns and result in reduced hunger, improved “satiety” or satisfaction with meals, and ultimately to reduce fat stores and weight. Other studies have found additional benefits for Type 2 diabetic patients, who may have reduced need for medication, and less complications from this debilitating disease. These results have caused the American Diabetes Association, the American Heart Association, the International Diabetes Foundation, and the American Association of Clinical Endocrinologists to endorse weight-loss surgery as a treatment for Type 2 diabetics with morbid obesity.

Morbid obesity is a complex chronic disease. Weight-loss surgery should be viewed first and foremost as a method for alleviating this debilitating disease. Having surgery is a serious decision. The information provided is intended to help you become more informed, and to learn how to the start the process.

Learn more about Eligibility Requirements for Bariatric Surgery