A/Prof Karantanis was born in Sydney and has trained in Sydney and London. He is a Fellow of the College of Obstetricians and Gynaecologists. He also completed a PhD and has subspecialty qualifications in Urogynaecology. He is a Conjoint Associate Professor with the University of NSW involved with teaching and research.
A/Prof Karantanis practices Obstetrics (caring for women through their pregnancy and childbirth), Gynaecology (managing menstrual disorders, ovarian cysts, fertility and other problems), and is a Certified Urogynaecologist (helping women with urinary incontinence and pelvic organ prolapse).
A/Prof Karantanis is experienced in evidence-based conservative approaches, minimally invasive and laparoscopic (keyhole) and robotic surgical techniques.