Dr. Katz is a Medically Supervised Weight Loss Physician. He is the director of the Medical Weight Loss program at New York Bariatric Group.

Dr. Leon Katz originates from Long Island New York.  He attended medical school at the New York University School of Medicine. He completed his residency and general surgery training at Beth Israel Deaconess Hospital in Boston and St. Barnabas Medical Center in New Jersey.  Dr. Katz completed his fellowship in Bariatric and Minimally Invasive Surgery at Northwell Syosset Hospital.

Dr. Katz smiling

Dr. Katz has developed multiple bariatric surgery programs, such as the Crozer Chester Medical Center in Pennsylvania, which was awarded the Center of Excellence designation under his direction.  Dr. Katz began performing robotic bariatric surgery in 2013 and became an established leader in the field having performed over 1100 robotic procedures in addition to over 1400 laparoscopic procedures. Dr. Katz was appointed clinical associate professor of surgery and assistant fellowship director of bariatric surgery at Reading Hospital in Pennsylvania, one of the largest Robotic Center of Excellence Bariatric programs in the United States. 

Dr. Katz works closely with his surgical colleagues to assist in the preoperative assessment and postoperative evaluation of patients who are pursuing bariatric surgery. As part of his practice, Dr. Katz offers bariatric endoscopy and comprehensive medical weight loss management to assist patients who do not qualify for surgery or are interested in a non-surgical option.  Dr. Katz brings his knowledge and passion for helping patients struggling with obesity.

Dr. Katz is a fellow of the American College of Surgeons, fellow of the American Society of Metabolic and Bariatric Surgery and certified by the American Board of Surgery. 


Lost 145lbs

Thomas' success story

I went in for surgery. An hour later, I came out a new man.

Everybody treated me like a king. The day of surgery, I was excited. The hospital couldn’t be any nicer. I went in for surgery. An hour later, I came out a new man. My recovery was awesome. I was out of bed that day. My wife and kids were my motivation on getting this surgery. They are my whole life. I’m happy I’m going to be around for them.

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Lost 76lbs

Nicole's success story

I hit my goal weight ... and I feel fabulous

I had the gastric bypass. I am Type 2 Diabetic and I wanted to gain control of my sugar. I hit my goal weight in about 5 and half months and I feel fabulous. The procedure has completely changed my life for the better because it has empowered me as a middle aged woman that I can really do everything and anything that I want to do. I don't put an age on anything. I don't say I'm too old for something.

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Lost 76lbs

Robert's success story

I was tired of the way I looked. I was tired of the way I felt.

I knew if I didn't change something soon, I was going to be in a lot of trouble. The consultation process was a lot easier than I expected. I was met with open arms. I was treated like I was the only patient here. Not only did they answer all of my questions, they had questions for me to make sure I was the right candidate for the surgery. After surgery and that weight started dropping off, my life started changing for the better.

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Lost 92lbs

Samantha's success story

I feel like a completely different person.

I had the gastric sleeve procedure. The driving factor behind me getting this procedure was my health. I didn't feel good physically or mentally. I had joint pains, even standing was difficult sometimes. Emotionally, this surgery completely turned my life around. I have so much more confidence. So much more happiness. I feel like a completely different person. I feel stronger. I feel able to accomplish more.

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Lost 99lbs