About Dr Karihaloo

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

He returned to practice after finishing his fellowship in advanced laparoscopic GI surgery on the Gold Coast. He has appointments in the private and public sectors and is former Director of General Surgery at John Hunter Hospital, and current chair of the Medical Advisory Committee at Lake Macquarie Private Hospital. He has been performing bariatric surgery in the primary and revisional setting for 15 years.

He 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 and presenter 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.

He is keen and committed to lifelong follow up of his bariatric surgical patients and ongoing research and quality improvement to optimise patient outcomes. 



  • Newcastle High School 1983-86
  • Sydney Boys High School 1986-88
  • Sydney University 1990-96


  • BSc(Med)(Hons 1) 1993
  • MBBS 1996
  • FRACS 2006


  • VMO, John Hunter Hospital
  • VMO, Belmont District Hospital
  • VMO, Lake Macquarie Private Hospital
  • VMO, Warners Bay Private Hospital
  • President, Hunter Surgical Society 2010-12
  • Director, Department of General Surgery John Hunter Hospital 2017-2021
Surgical Experience
  • First Laparoscopic Sleeve Gastrectomy in the Hunter region – June 2008
  • First Laparoscopic Gastric Bypass in the Hunter region – June 2009
  • First Laparoscopic Distal Pancreatectomy in the Hunter region – August 2009
  • Laparoscopic Gastric Banding – 500+ cases
  • Laparoscopic Sleeve Gastrectomy – 800+ cases
  • Laparoscopic Gastric Bypass – 100+ cases
  • Laparoscopic Single Anastomosis Gastric Bypass (“mini bypass”)
  • Laparoscopic Gastric Plication
  • Laparoscopic Colectomy – 200+ cases
  • Laparoscopic Fundoplication
  • Laparoscopic Hernia Repair – 1000+ cases
  • Laparoscopic Bile Duct Exploration
  • Laparoscopic Cholecystectomy – 1000+ cases
  • Laparoscopic distal Pancreatectomy, segmental Heptatectomy, Splenectomy, Adrenalectomy
  • Pancreaticoduodenectomy
  • Biliary resection/reconstruction
  • Hepatectomy
  • Extensive experience of all emergent and elective open general surgical procedures and trauma
  • Demonstrator at Bard Floseal Workshop September 2007, Royal Brisbane Hospital
  • Demonstrator at Tyco Laparoscopic Colectomy Workshop August 2007, Gold Coast
  • Bariatric Surgery – Beyond the Basics.  Johnson and Johnson workshop July 2007, Melbourne
  • Advanced Bariatric Surgery – workshop, Hamburg August 2009
  • Intragastric Balloon – workshop, Sydney September 2010
  • Laparoscopic Ventral Rectopexy – workshop, Brisbane August 2011
  • Apollo endoscopic suturing workshop – Sydney November 2016
  • The Allergens of Alternaria Alternata.  BSc(med) Thesis, Sydney University, 1993.
  • Britton WJ, Tovey ER, Sluyter R, Karihaloo C (1994).  Analysis of IgE reactivity to house dust mite, grass pollen and fungal allergens in MZ and DZ twins by immunoblotting.  Allergy Clin Immunol News (sup) 2:315
  • Wills VL, Gibson K, Karihaloo C, Jorgensen JO (2002). Complications of biliary T-tubes after choledochotomy. ANZ J. Surg. 72(3): 177 -80.  Listed in top 20 most cited articles from ANZJS
  • Karihaloo C, Tovey ER, Mitakakis TZ, Duffy DL,  Britton WJ (2002). Evidence for the genetic control of immunoglobulin E reactivity to the allergens of Alternaria  alternata. Clinical and Experimental Allergy 32(9):1316-22.
  • Agrez M, Karihaloo C, Reeves G, Puvaneswary M, Sturm L, Scurry J (2004).  Rectal cancer masquerading as an amoeboma: case report and review of the literature.  ANZ J Surg. 74(9):812-5.
  • Dewar D, Karihaloo C, Gani J Splenosis, Splenunculi.http://www.surgicalexam.com/case-reports/report1.html 
  • Karihaloo C.  Obesity Surgery: the 21st century evidence.  Medicine Today. 11(8):81-3.
  • Williams J, Karihaloo C.  Comparison of gastric banding and sleeve gastrectomy.  ANZCS ASC 2011.
  • Karihaloo C. Body composition after sleeve gastrectomy. IFSO 2013

 Presentations (2012-)

  • Bariatric surgery and fertility. Newcastle Obstetric and Gynaecology Society. October 2012
  • Body composition after sleeve gastrectomy. IFSO Istanbul, Turkey August 2013
  • Metabolic surgery. Internal Medicine Society of ANZ. Newcastle September 2013
  • Complex ventral hernia repair. Newcastle November 2014


Dr Karihaloo practices from the second floor of the Lake Macquarie Specialist Medical Centre.

Level 2, Suite 1
Lake Macquarie Specialist Medical Centre
6-8 Sydney St, Gateshead NSW 2290

If you have any enquiries or to make an appointment phone (02) 4947 8177 or email admin@surgerycentral.com.au