Healthier Weight
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Mr John Loy MB BCh BAO FRCS (Gen Surg)

Mr John Loy

Mr Loy is a new member of the Healthier Weight surgical team and an experienced Consultant Upper GI and Bariatric Surgeon.

He has been trained to Royal College of Surgeon’s Fellowship level in Bariatric Surgery and spent a year in the world renowned NYU Langone Medical Centre with Professors George and Christine Fielding.

He operates a busy full-time NHS weight loss surgery practice, receiving tertiary referrals for primary and complex revisional surgery. 

He is the surgical teaching coordinator for Queen Mary University Barts and the London medical students at the Homerton University Hospital and a collaborates on research into fatty liver disease in obesity with the Blizzard Institute. 

Mr Loy regularly appears in the media regarding weight loss surgery and is involved in training and assessing surgical doctors to perform bariatric surgery. Patients appreciate his person-centred friendly and approachable manner ensuring the best outcomes and patient satisfaction.



Career profile

  • Completed medical school and basic surgical training in Belfast in 2002
  • Higher surgical training in Severn Deanery, specialising in upper GI and bariatric surgery
  • Expert laparoscopic bariatric training in Bristol, Gloucester, Truro and Taunton as a specialist registrar 
  • Consolidated training through a Royal College of Surgeons fellowship in the Southwest Bariatric Surgery Centre of Excellence in Taunton
  • Recently spent a year in New York with Professors George and Christine Fielding at the internationally renowned NYU Langone Bariatric Surgery Unit - one of the busiest bariatric units in the world

Procedures and specialisms


Current positions and membership

  • GMC Number: 6053450
  • Consultant Upper GI and Bariatric Surgeon Homerton University Hospital, London.
  • Fellow Royal College of Surgeons of Edinburgh
  • British Obesity and Metabolic Surgery Society
  • Association of Upper GI Surgeons
  • Association of Surgeons of Great Britain and Ireland

For prices and finance options, get a quote here or call 0800 313 4618

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*Weight loss surgery results and benefits vary and are different for each individual. As such, Healthier Weight cannot guarantee specific weight loss goals.