
Prof. Dr. Nik Ritza Kosai
Obesity/Bariatric Surgery
About
Dr. Nik Ritza Kosai Nik Mahmood is among Malaysia’s pioneers in the field of bariatric and upper gastrointestinal surgery. He pioneered Malaysia's first and foremost centre for obesity and metabolic surgery. He studied at the University of St Andrews, Scotland and the University of Manchester, completed his Specialist Surgical Training in NW of England and was awarded MRCS & FRCS (General Surgery) in the UK.
Professional Background
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First Clinic/Unit Established: UGI and Bariatrics Unit at Hospital Canselor Tuanku Muhriz, PPUKM (2011) - first referral centre for upper GI cancers and obesity treatment in Malaysia
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Procedures Performed: More than 2,300 bariatric /metabolic operations and more than 500 intragastric balloons.
Innovations & Contributions
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Research Contributions: Published over 200 peer-reviewed papers on outcome of bariatric surgery, oesophageal and gastric cancers, Helicobacter pylori and gastro-oesophageal reflux; obtained research grants worth a total of over RM 2 million
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Notable Medical Advancements: Has been widely published internationally and locally including co-authoring research into the history and evolution of bariatric surgery in Malaysia; participated in the development of the national guidelines for managing all stages of bariatric surgery and the National Obesity Guidelines.
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Leadership Roles: President, Malaysian Metabolic and Bariatric Surgical Society; President, Malaysia Chapter of IFSO (International Federation for the Surgery of Obesity); Vice President, Malaysian Upper GI Society; examiner for the MRCS (Royal College of Surgeons of Edinburgh)
Good to Know
Specialties
Languages Spoken
Awards
• Dato' (State Title)
• 1500+ Bariatric Surgery Milestone
Consultant General Surgeon
Gleneagles Hospital Kuala Lumpur
2011 - Present
Head of Upper GI, Metabolic & Bariatric Surgery
2011 - Present
Consultant General Surgeon
2024 - Present
MRCS & FRCS (General Surgery)
Royal College of Surgeons, UK
2009
MBChB
University of Manchester, UK
1995
BSc (Med Sci)
University of St. Andrews, Scotland, UK
1992
Gleneagles Hospital Kuala Lumpur
Nik Ritza Kosai has been practicing medicine since 2005, giving them over 20 years of clinical experience. They currently serve as Bariatric & Upper GI Surgeon and have built a focused career in bariatric & upper gi surgeon, gleneagles hospital.
You can request a consultation with Nik Ritza Kosai through CureMeAbroad by submitting your details. Video consultations are available for international patients before travel through CureMeAbroad.
Bariatric surgery with Nik Ritza Kosai typically costs 50-70% less than equivalent procedures in the US or UK. The final price depends on the procedure type (sleeve, bypass, or mini bypass), length of hospital stay, and pre-surgical workup. CureMeAbroad can provide a detailed quote after reviewing your medical profile.
Nik Ritza Kosai practices at Gleneagles Hospital in Kuala Lumpur. The facility is equipped with modern surgical and diagnostic infrastructure, and maintains international accreditation standards to ensure a safe and reliable care environment for overseas patients.
Yes, Nik Ritza Kosai regularly treats patients from the US, UK, Europe, Australia, and the Middle East. Their hospital provides dedicated international patient support including pre-arrival medical record review, visa support letters, airport transfers, and coordination of post-travel follow-up care.
Nik Ritza Kosai specializes in bariatric and metabolic surgery, including gastric sleeve, gastric bypass (Roux-en-Y), and mini gastric bypass. They use minimally invasive laparoscopic techniques to reduce recovery time and improve long-term outcomes for patients managing obesity or metabolic conditions.
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How many years of experience does Nik Ritza Kosai have?

Nik Ritza Kosai has been practicing medicine since 2005, giving them over 20 years of clinical experience. They currently serve as Bariatric & Upper GI Surgeon and have built a focused career in bariatric & upper gi surgeon, gleneagles hospital.
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