A look at our institute's specialities


GEM Obesity & Diabetes Surgery Centre is now the proud recipient of South India's FIRST & ONLY Bariatric Surgery Centre of Excellence (BSCOE) designation in India.

With the blessings of Dr.C.Palanivelu , a pioneer in the field of laparoscopy and considered to be one of the greatest surgeons of all times, Dr. P. Praveen Raj has taken the department to great heights, not just in par but better than most centres' around the globe. Praveen Raj is the only surgeon in south India to be branded as the Bariatric Surgeon of Excellence in this part of the globe.

Dr. Praveen Raj and his team is credited with performing over 3000 bariatric surgical procedures with the largest numbers of Single Incision surgeries in the country, which includes all varieties of procedures including a laparoscopic cholecystectomy, obesity surgery to even complicated cancer surgeries like cancer rectum, colon etc. He has also performed the first single incision laparoscopic Roux en Y Gastric Bypass in the country with the credit of having the largest numbers in the country in this surgery.When countries are facing the problems of lack of co-ordination between surgeons and physicians, his efforts have made him author the "Bariatric Surgery Practice Guide”, A first of its kind book by an Indian author.

He’s also the most celebrated surgeon having performed bariatric surgeries on many Indian celebrities and politicians. He’s also trained over 200 surgeons in the field of bariatric surgery , being the most sought after training centre for bariatric surgery.


  • Obesity Surgery Society of India (OSSI)
  • International Federation of the Society of Obesity and Metabolic Disorders (IFSO)
  • American Society for Metabolic and Bariatric surgery Society (ASMBS)
  • Association of Surgeons of India (ASI)
  • Association of Minimal Access Surgeons of India (AMASI)
  • Indian Association for Gastrointestinal Endosurgeons (IAGES)


  • President for the International Excellence Federation for Bariatric Surgery (India Chapter),
  • Honorary Secretary for the Obesity Surgery Society of India,
  • Chair -Young-IFSO-APC and
  • Organising Committee Member representing India for the upcoming World Congress of the International Federation for Surgery for Obesity to be held in Dubai in September 2018.

Dr. Praveen Raj is the Editor-in-Chief for the most sought after “Bariatric Surgery Practice Guide” a first of its kind textbook from India. He has authored several papers and presentations on laparoscopy and bariatric procedures, and has held several workshops and conferences on obesity, bariatric surgery and laparoscopy across Asia. He’s also the first in Asia to be awarded with a doctorate (PhD) in bariatric surgery by the Datta Meghe Institute of Medical Sciences, Nagpur.

Dr. Praveen Raj has completed his Bachelors of Medicine in PSG Institute of Medical Sciences, Coimbatore with Honours and the Masters in General Surgery from the prestigious Sri Ramachandra University, Chennai. He also secured his masters in Surgery and Surgical Gastroenterology from the National Board (DNB).He completed his fellowship in Bariatric surgery from Tugun, Australia and the Weill-Cornell University at NYC. He’s also been honoured with the Honorary Fellow in Advanced laparoscopy by the Indian Association for Gastrointestinal Endosurgeons (IAGES)

He constantly pushes the envelope in the field of metabolic research and has numerous publications and presentations to his name. He research on non-alcoholic fatty liver disease has shown insights into how obesity can increase the incidences of liver diseases and the role of bariatric surgery in reducing and preventing this. He has also spear-headed the idea of Enhanced Recovery in surgery(ERAS) for bariatric surgery wherein the patients recover quickly and comfortably that they can be discharged in one day after the surgery.

  • Has performed over 3000 bariatric procedures being the largest in South India
  • First Surgeon in the World to perform series of laparoscopic DuodenoJejunal bypass surgeries for treatment of Obesity & Diabetes
  • First Surgeon to perform Single Incision Laparoscopic Gastric Bypass in the country
  • First South Indian Surgeon to be recognised as an International Surgeon of Excellence the by Surgical Review Corporation, USA 2012
  • President, International Excellence Federation in Bariatric Surgery(India Chapter)
  • Honorary Secretary , Obesity Surgery Society of India

Click here to listen to Dr.Praveen Raj on the myths and facts of losing weight.



Our team comprises of highly motivated and qualified medical and management professionals. Each team member brings with them vast experience and an overarching dedication to the holistic care of the bariatric patient.


Founder & Chairman of GEM Hospital, Institute of Gastroenterology & Laparoscopy

"A pioneer in laparoscopic, who revolutioned laparoscopic surgery for cancers of the gastrointestinaltract"


Head & Consultant – Obesity & Diabetes Surgery Centre

  • Director- Gem Hospital, Institute of Gastroenterology & Laparoscopy
  • President - International Excellence Federation for Bariatric & Metabolic Surgery, India Chapter Surgeon of Excellence, Surgical Review Corporation, USA
  • Honorary Secretary, Obesity Surgery Society of India


Senior Bariatric Consultant


Consultant Diabetologist & Cardiologist

Dr. Divakar


Dr. Raghunath


Dr. Prabhakaran

Bariatric Anaesthetist

Dr. Siddartha Bhattacharya

Junior Consultant

Ms. Usha


Ms. Uma


Ms. Deepika


Ms. Deepa

Patient Manager

At Gem Obesity & Diabetes Surgery Centre, our support groups constitute an integral part of our vision to provide safe, effective and efficacious care to our patient population. Research has consistently demonstrated that ongoing post- surgical support is absolutely critical to the success of bariatric surgery and long-term sustained weight loss and weight maintenance and that support group meeting attendance directly increases the chances of short and long term patient success post bariatric surgery.

We recognize that obesity is a debilitating disease of mind, body and spirit and must be addressed holistically to achieve long-term success. Post Surgery patients realize that weight loss surgery will not miraculously eliminate the emotional or psychological trauma that morbid obesity had inflicted on them for years on end. They are also in the process of developing an entirely new way of looking at food as well as having to respond to questions about their bariatric surgery experience, both on a personal and professional basis.

Our support groups are in place to assist patients with addressing more immediate and long-term questions and needs including the most beneficial diets, exercise regimens, body contouring options, dealing with lifestyle changes that follow bariatric surgery etc.

Regardless of where a patient is in the process (considering bariatric surgery, arriving just prior to the surgery or post-surgery), they are welcome to attend the sessions and are highly encouraged to bring their loved ones along as well. The success of this surgery also hinges on the unwavering support the patient receives at home, which is why educating the family is a priority for us.

Topics addressed at the support group meetings range from providing the latest information on diet and exercise regimens to learning how to view food differently to the importance of adhering to the medication regimen strictly to ways to bolster one’s emotional, mental, psychological and spiritual health.