Dr Costa Karihaloo grew up in Newcastle and completed medical training at Sydney University and surgical training based in the Hunter region.

Dr Karihaloo returned to practice in Newcastle having completed the Ramsay Fellowship in advanced laparoscopic surgery on the Gold Coast. He has appointments in the private and public sectors and is a former Director of General Surgery at the John Hunter Hospital. He is the Chairman of the Medical Advisory Committee at Lake Macquarie Private Hospital and has been performing bariatric surgery for fifteen years.

Dr Karihaloo performed the first laparoscopic sleeve gastrectomy in the Hunter region in 2008 and has successfully performed over 1000 cases since then. He performed the first laparoscopic gastric bypass in the region in 2009, the first laparoscopic mini-gastric bypass in 2013 and the first laparoscopic post pyloric bypass in 2018. He has been a regular contributor at national and international meetings and has a particular interest in body composition post bariatric surgery as well as adjuvant medical therapies post weight loss surgery.

Dr Karihaloo is committed to lifelong follow up of bariatric surgical patients and ongoing research and quality improvement to optimise patient outcomes. Dr Karihaloo operates at Belmont and John Hunter Hospital and at Lake Macquarie Private Hospital and Warners Bay Private Hospital.